2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 999
* Ignition ON.
* Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
The EBCM detects an internal malfunction.
Action Taken When the DTC Sets
* The EBCM disables the antilock brake system (ABS), traction control and the vehicle stability enhancement system for the duration of the
ignition cycle.
* A driver information center message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 1 ohm between the ground circuits listed below and ground.
* Terminal 13
* Terminal 38
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.
* Terminal 1
* Terminal 25
瀚慖f the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
Showing posts with label * Ignition ON.. Show all posts
Showing posts with label * Ignition ON.. Show all posts
Friday, December 20, 2019
Wednesday, December 18, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 973
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 973
* Ignition ON.
* Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
The EBCM detects an internal malfunction.
Action Taken When the DTC Sets
* The EBCM disables the antilock brake system (ABS), traction control and the vehicle stability enhancement system for the duration of the
ignition cycle.
* A driver information center message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 1 ohm between the ground circuits listed below and ground.
* Terminal 13
* Terminal 38
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.
* Terminal 1
* Terminal 25
瀚慖f the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
* Ignition ON.
* Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
The EBCM detects an internal malfunction.
Action Taken When the DTC Sets
* The EBCM disables the antilock brake system (ABS), traction control and the vehicle stability enhancement system for the duration of the
ignition cycle.
* A driver information center message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 1 ohm between the ground circuits listed below and ground.
* Terminal 13
* Terminal 38
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.
* Terminal 1
* Terminal 25
瀚慖f the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
Monday, December 16, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 917
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 917
* Ignition ON.
* Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
* The EBCM detects an open in the low reference circuit.
* The EBCM detects that the two signal circuits do not match each other.
Action Taken When the DTC Sets
* The EBCM disables the antilock brake system (ABS), traction control and the vehicle stability enhancement system (VSES) for the duration
of the ignition cycle.
* A DIC message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, use a scan tool to observe the EBCM BMC Primary Piston Position Sensor A and B parameter while applying and releasing the brake
pedal. The voltage should change between 0-5 V.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the brake master cylinder piston position sensor.
2. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal 4 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 2 and ground.
瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the EBCM.
瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
4. Verify the scan tool BMC Primary Piston Position Sensor A parameter is less than 1 V.
瀚慖f greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the EBCM.
5. Install a 3A fused jumper wire between the signal circuit terminal 3 and the 5 V reference circuit terminal 2. Verify the scan tool BMC
* Ignition ON.
* Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
* The EBCM detects an open in the low reference circuit.
* The EBCM detects that the two signal circuits do not match each other.
Action Taken When the DTC Sets
* The EBCM disables the antilock brake system (ABS), traction control and the vehicle stability enhancement system (VSES) for the duration
of the ignition cycle.
* A DIC message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, use a scan tool to observe the EBCM BMC Primary Piston Position Sensor A and B parameter while applying and releasing the brake
pedal. The voltage should change between 0-5 V.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the brake master cylinder piston position sensor.
2. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal 4 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 2 and ground.
瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the EBCM.
瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
4. Verify the scan tool BMC Primary Piston Position Sensor A parameter is less than 1 V.
瀚慖f greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the EBCM.
5. Install a 3A fused jumper wire between the signal circuit terminal 3 and the 5 V reference circuit terminal 2. Verify the scan tool BMC
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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 666
Ignition ON, observe the scan tool BCM Hood Open Switch and Hood Closed Switch parameters. With the hood open, the Hood Open Switch
parameter should read Active and the Hood Closed Switch parameter should read Inactive. With the hood closed, the Hood Open Switch parameter
should read Inactive and the Hood Closed Switch parameter should read Active.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the hood ajar switch.
2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal C and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, test for 11.5-12.0 volts between the signal circuit terminal A and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the BCM.
4. Ignition ON, test for 11.5-12.0 volts between the signal circuit terminal B and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the BCM.
5. If all circuits test normal, test or replace the hood ajar switch.
Component Testing
Hood Ajar Switch
1. Ignition OFF, disconnect the harness connector at the hood ajar switch.
2. With the switch in the hood closed position, test for infinite resistance between the ground terminal C and the signal terminal A.
瀚慖f not infinite, replace the hood ajar switch.
3. Test for less than 2.0 ohms between the ground terminal C and the signal terminal B.
瀚慖f greater than the specified range, replace the hood ajar switch.
4. With the switch in the hood open position, test for infinite resistance between the ground terminal C and the signal terminal B.
瀚慖f not infinite, replace the hood ajar switch.
5. Test for less than 2.0 ohms between the ground terminal C and the signal terminal A.
瀚慖f greater than the specified range, replace the hood ajar switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Hood Primary and Secondary Latch Replacement (See: Body and Frame/Doors, Hood and Trunk/Hood/Hood Latch/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, programming and setup
B3031
DTC B3031
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
Ignition ON, observe the scan tool BCM Hood Open Switch and Hood Closed Switch parameters. With the hood open, the Hood Open Switch
parameter should read Active and the Hood Closed Switch parameter should read Inactive. With the hood closed, the Hood Open Switch parameter
should read Inactive and the Hood Closed Switch parameter should read Active.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the hood ajar switch.
2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal C and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, test for 11.5-12.0 volts between the signal circuit terminal A and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the BCM.
4. Ignition ON, test for 11.5-12.0 volts between the signal circuit terminal B and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the BCM.
5. If all circuits test normal, test or replace the hood ajar switch.
Component Testing
Hood Ajar Switch
1. Ignition OFF, disconnect the harness connector at the hood ajar switch.
2. With the switch in the hood closed position, test for infinite resistance between the ground terminal C and the signal terminal A.
瀚慖f not infinite, replace the hood ajar switch.
3. Test for less than 2.0 ohms between the ground terminal C and the signal terminal B.
瀚慖f greater than the specified range, replace the hood ajar switch.
4. With the switch in the hood open position, test for infinite resistance between the ground terminal C and the signal terminal B.
瀚慖f not infinite, replace the hood ajar switch.
5. Test for less than 2.0 ohms between the ground terminal C and the signal terminal A.
瀚慖f greater than the specified range, replace the hood ajar switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Hood Primary and Secondary Latch Replacement (See: Body and Frame/Doors, Hood and Trunk/Hood/Hood Latch/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, programming and setup
B3031
DTC B3031
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
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2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 905
* Ignition ON.
* System voltage 10.5-18 V.
Conditions for Setting the DTC
The TCCM monitors the front axle switch signal circuit and the front axle actuator control circuit for unexpected voltages. The DTC sets if the
TCCM detects a high voltage when a low voltage is expected or a low voltage when a high voltage is expected.
Action Taken When the DTC Sets
C0379 01 and C0379 04
* The front axle remains disengaged at all times.
* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.
C0379 02
* The front axle remains engaged at all times.
* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.
C0379 08
The front axle remains in current mode.
Conditions for Clearing the DTC
* The TCCM clears the DTC once the conditions for setting the DTC are no longer present.
* A history DTC clears after 40 consecutive warm up cycles without a fault present.
* History DTCs can be cleared using a scan tool.
Diagnostic Aids
The transfer case fill/drain plugs provide a good ground point.
Reference Information
Schematic Reference
Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3010-NP0 - Transfer Case)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.
Special Tools
* EL-49741 - 9 V+ Power Source Harness
* EL-49742 - Battery Voltage B+ and Ground Source Harness
* J 35616 - GM-Approved Terminal Test Kit
Circuit/System Verification
1. Key ON, engine OFF. Parking brake applied. Transmission in Neutral. Install a scan tool.
2. While monitoring the Front Axle Actuator parameter of the Data Display function on the scan tool, shift the vehicle into 4WD HI. The front
axle actuator parameter should display Active or Engaged. You should also be able to hear the axle actuator engaging.
3. Shift the vehicle into 2WD HI. The Front Axle Actuator parameter should display Inactive or Disengaged. You should also be able to hear
the axle actuator disengaging.
Circuit/System Testing
* Ignition ON.
* System voltage 10.5-18 V.
Conditions for Setting the DTC
The TCCM monitors the front axle switch signal circuit and the front axle actuator control circuit for unexpected voltages. The DTC sets if the
TCCM detects a high voltage when a low voltage is expected or a low voltage when a high voltage is expected.
Action Taken When the DTC Sets
C0379 01 and C0379 04
* The front axle remains disengaged at all times.
* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.
C0379 02
* The front axle remains engaged at all times.
* The SERVICE 4WD indicator remains illuminated for the remainder of the current ignition cycle.
C0379 08
The front axle remains in current mode.
Conditions for Clearing the DTC
* The TCCM clears the DTC once the conditions for setting the DTC are no longer present.
* A history DTC clears after 40 consecutive warm up cycles without a fault present.
* History DTCs can be cleared using a scan tool.
Diagnostic Aids
The transfer case fill/drain plugs provide a good ground point.
Reference Information
Schematic Reference
Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3010-NP0 - Transfer Case)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.
Special Tools
* EL-49741 - 9 V+ Power Source Harness
* EL-49742 - Battery Voltage B+ and Ground Source Harness
* J 35616 - GM-Approved Terminal Test Kit
Circuit/System Verification
1. Key ON, engine OFF. Parking brake applied. Transmission in Neutral. Install a scan tool.
2. While monitoring the Front Axle Actuator parameter of the Data Display function on the scan tool, shift the vehicle into 4WD HI. The front
axle actuator parameter should display Active or Engaged. You should also be able to hear the axle actuator engaging.
3. Shift the vehicle into 2WD HI. The Front Axle Actuator parameter should display Inactive or Disengaged. You should also be able to hear
the axle actuator disengaging.
Circuit/System Testing
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Ignition ON, perform the Pump Motor Test with a scan tool and listen/feel the Pump Motor turn ON and OFF.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 1 ohm between the ground circuits listed below and ground:
* Terminal 38
* Terminal 13
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground:
* Terminal 25
* Terminal 1
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the
B+ circuit fuse is open, replace the BPMV.
4. If all circuits test normal, replace the BPMV and verify DTC does not reset. If the DTC resets replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Brake Pressure Modulator Valve Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Hydraulic
Control Assembly - Antilock Brakes/Service and Repair/Less than 3900 kg (8600 lb) GVW)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
Antilock Brake System - Non-Hybrid Greater than/Equal to 3900 kg (8600 lb) GVW
DTC C0110
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC C0110 03
- Pump Motor Circuit Voltage Below Threshold
DTC C0110 04
- Pump Motor Circuit Open Circuit
DTC C0110 61
- Pump Motor Circuit Actuator Stuck
Diagnostic Fault Information
Circuit/System Description
The pump motor is an integral part of the brake pressure modulator valve (BPMV), while the pump motor relay is integral to the electronic brake
control module (EBCM). The pump motor relay is not engaged during normal system operation. When the antilock brake system (ABS) or traction
control system (TCS) operation is required the EBCM activates the pump motor relay and turns the pump motor ON.
Ignition ON, perform the Pump Motor Test with a scan tool and listen/feel the Pump Motor turn ON and OFF.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 1 ohm between the ground circuits listed below and ground:
* Terminal 38
* Terminal 13
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground:
* Terminal 25
* Terminal 1
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the
B+ circuit fuse is open, replace the BPMV.
4. If all circuits test normal, replace the BPMV and verify DTC does not reset. If the DTC resets replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Brake Pressure Modulator Valve Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Hydraulic
Control Assembly - Antilock Brakes/Service and Repair/Less than 3900 kg (8600 lb) GVW)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
Antilock Brake System - Non-Hybrid Greater than/Equal to 3900 kg (8600 lb) GVW
DTC C0110
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC C0110 03
- Pump Motor Circuit Voltage Below Threshold
DTC C0110 04
- Pump Motor Circuit Open Circuit
DTC C0110 61
- Pump Motor Circuit Actuator Stuck
Diagnostic Fault Information
Circuit/System Description
The pump motor is an integral part of the brake pressure modulator valve (BPMV), while the pump motor relay is integral to the electronic brake
control module (EBCM). The pump motor relay is not engaged during normal system operation. When the antilock brake system (ABS) or traction
control system (TCS) operation is required the EBCM activates the pump motor relay and turns the pump motor ON.
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Ignition ON, observe the scan tool Mirror Horizontal Position and Mirror Vertical Position parameters. The reading should be between 0.2-4.8 volts
and change as the mirror is moved, left, right, up, and down.
Circuit/System Testing
1. Ignition OFF, disconnect the X7 harness connector at the appropriate door module.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground:
* 5-volt reference circuit terminal 7
* Signal circuit terminal 4
* Signal circuit terminal 5
* Low reference circuit terminal 10
瀚慖f the test lamp illuminates, test the appropriate circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground:
* 5-volt reference circuit terminal 7
* Signal circuit terminal 4
* Signal circuit terminal 5
* Low reference circuit terminal 10
瀚慖f less than the specified value, test the appropriate circuit for a short to ground.
4. Test for 4K-7K ohms between the 5-volt reference circuit terminal 7 and the low reference circuit terminal 10.
瀚慖f not within the specified range, test the 5-volt reference circuit and the low reference circuit for an open/high resistance. If the circuits
test normal, test or replace the rearview mirror.
5. Test for 1K-7K ohms between the 5-volt reference circuit terminal 7 and the signal circuit terminal 4.
瀚慖f not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview
mirror.
6. Test for 1K-7K ohms between the 5-volt reference circuit terminal 7 and the signal circuit terminal 5.
瀚慖f not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview
mirror.
7. If all circuits test normal, replace the door module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Outside Rearview Mirror Motor Replacement (See: Body and Frame/Mirrors/Power Mirror Motor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for DDM or PDM replacement, setup, and
programming
B1600
DTC B1544, B1600, or B1605
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1544 01
- Mirror Motors Common Circuit Short to Battery
DTC B1544 02
- Mirror Motors Common Circuit Short to Ground
Ignition ON, observe the scan tool Mirror Horizontal Position and Mirror Vertical Position parameters. The reading should be between 0.2-4.8 volts
and change as the mirror is moved, left, right, up, and down.
Circuit/System Testing
1. Ignition OFF, disconnect the X7 harness connector at the appropriate door module.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground:
* 5-volt reference circuit terminal 7
* Signal circuit terminal 4
* Signal circuit terminal 5
* Low reference circuit terminal 10
瀚慖f the test lamp illuminates, test the appropriate circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground:
* 5-volt reference circuit terminal 7
* Signal circuit terminal 4
* Signal circuit terminal 5
* Low reference circuit terminal 10
瀚慖f less than the specified value, test the appropriate circuit for a short to ground.
4. Test for 4K-7K ohms between the 5-volt reference circuit terminal 7 and the low reference circuit terminal 10.
瀚慖f not within the specified range, test the 5-volt reference circuit and the low reference circuit for an open/high resistance. If the circuits
test normal, test or replace the rearview mirror.
5. Test for 1K-7K ohms between the 5-volt reference circuit terminal 7 and the signal circuit terminal 4.
瀚慖f not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview
mirror.
6. Test for 1K-7K ohms between the 5-volt reference circuit terminal 7 and the signal circuit terminal 5.
瀚慖f not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview
mirror.
7. If all circuits test normal, replace the door module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Outside Rearview Mirror Motor Replacement (See: Body and Frame/Mirrors/Power Mirror Motor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for DDM or PDM replacement, setup, and
programming
B1600
DTC B1544, B1600, or B1605
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1544 01
- Mirror Motors Common Circuit Short to Battery
DTC B1544 02
- Mirror Motors Common Circuit Short to Ground
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Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B93
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B93
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
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Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B73
DTC P0B3C, P0B41, P0B46, P0B4B, P0B50, P0B55, P0B5A, P0B5F, P0B64, P0B69, P0B6E, P0B73, P0B78, P0B7D, P0B82, P0B87, P0B8C,
P0B91, P0B96, or P0B9B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B73
DTC P0B3C, P0B41, P0B46, P0B4B, P0B50, P0B55, P0B5A, P0B5F, P0B64, P0B69, P0B6E, P0B73, P0B78, P0B7D, P0B82, P0B87, P0B8C,
P0B91, P0B96, or P0B9B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
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Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B4D
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B4D
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1291
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* Ignition ON.
* Motor temperature is greater than -40掳C (-40掳F).
瀚慖f motor temperature is less than -40掳C (-40掳F) at Ignition ON, the drive motor must operate at greater than 20 Nm (14.75 lb ft) for a
cumulative time of 1.5 minutes before the DTC will run.
Conditions for Setting the DTC
P0AEE, P0AF3, P0BD2, P0BD7, P0BDC, and P0BE1
* A 15掳C ( 27掳F) difference is observed between the individual inverter phase temperature sensor and the average of all the inverter phase
temperatures.
* The above condition is present for 4 seconds.
P0AEF, P0AF4, P0BD3, P0BD8, P0BDD, and P0BE2
The inverter phase temperature sensor is greater than 125掳C (275掳F) for 3 seconds.
P0AF0, P0AF5, P0BD4, P0BD9, P0BDE, and P0BE3
The inverter phase temperature sensor is less than -40掳C (-40掳F) for 3 seconds.
Action Taken When the DTC Sets
* DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE,
P0BE1, P0BE2 AND P0BE3 are Type B DTCs.
* The PIM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE, P0BE1,
P0BE2 AND P0BE3 are Type B DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Clear the DTC information.
2. Ignition OFF for 1 minute.
3. Operate the vehicle under the Conditions for Running the DTC.
4. Retest for DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD,
P0BDE, P0BE1, P0BE2 AND P0BE3.
Circuit/System Testing
Program the PIM with the latest software version and recheck for DTCs.
If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
P0BE3
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
* Ignition ON.
* Motor temperature is greater than -40掳C (-40掳F).
瀚慖f motor temperature is less than -40掳C (-40掳F) at Ignition ON, the drive motor must operate at greater than 20 Nm (14.75 lb ft) for a
cumulative time of 1.5 minutes before the DTC will run.
Conditions for Setting the DTC
P0AEE, P0AF3, P0BD2, P0BD7, P0BDC, and P0BE1
* A 15掳C ( 27掳F) difference is observed between the individual inverter phase temperature sensor and the average of all the inverter phase
temperatures.
* The above condition is present for 4 seconds.
P0AEF, P0AF4, P0BD3, P0BD8, P0BDD, and P0BE2
The inverter phase temperature sensor is greater than 125掳C (275掳F) for 3 seconds.
P0AF0, P0AF5, P0BD4, P0BD9, P0BDE, and P0BE3
The inverter phase temperature sensor is less than -40掳C (-40掳F) for 3 seconds.
Action Taken When the DTC Sets
* DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE,
P0BE1, P0BE2 AND P0BE3 are Type B DTCs.
* The PIM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE, P0BE1,
P0BE2 AND P0BE3 are Type B DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Clear the DTC information.
2. Ignition OFF for 1 minute.
3. Operate the vehicle under the Conditions for Running the DTC.
4. Retest for DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD,
P0BDE, P0BE1, P0BE2 AND P0BE3.
Circuit/System Testing
Program the PIM with the latest software version and recheck for DTCs.
If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
P0BE3
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Wednesday, November 6, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1258
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1258
Ignition ON, command the battery pack vent fan speed to 60 percent duty cycle with a scan tool. The battery pack vent fan should turn ON after
approximately a 10 second delay.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must
be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
Note: Perform the Generator Battery Vent Fan test first
Generator Battery Vent Fan Test
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Ignition OFF, disconnect the generator battery vent fan.
3. Connect the 12 V battery.
4. Test for less than 5 ohm between the generator battery vent fan ground circuit terminal 3 and ground
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
5. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 3.
6. Command the battery pack vent fan speed between 0 and 60 percent with a scan tool. The test lamp should turn ON and OFF after a 10
second delay.
瀚慖f the test lamp does not turn ON and OFF, refer to Generator Battery Vent Fan Relay test.
7. Connect a DMM between the control circuit terminal 4 and ground.
8. Command the battery vent fan to 60 percent with a scan tool. Test for less than 1 V after a 10 second delay.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the drive motor
generator battery control module.
9. Command the battery vent fan to 0 percent with a scan tool. Switch the DMM to the diode test. The DMM reading should display O.L.
瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuits test normal, replace the drive motor generator
battery control module.
10. Command the battery vent fan to 60 percent with a scan tool. The reading should be less than 3 V.
瀚慖f less than the specified range or displaying O.L., test the control circuit for an open/high resistance. If the circuits test normal, replace
the drive motor generator battery control module.
Generator Battery Vent Fan Relay Test
1. Disconnect the harness connector at the battery vent fan relay.
2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 4 and ground.
瀚慖f the test lamp illuminates, test the control circuit for a short to voltage.
3. Verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
Ignition ON, command the battery pack vent fan speed to 60 percent duty cycle with a scan tool. The battery pack vent fan should turn ON after
approximately a 10 second delay.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must
be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
Note: Perform the Generator Battery Vent Fan test first
Generator Battery Vent Fan Test
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Ignition OFF, disconnect the generator battery vent fan.
3. Connect the 12 V battery.
4. Test for less than 5 ohm between the generator battery vent fan ground circuit terminal 3 and ground
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
5. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 3.
6. Command the battery pack vent fan speed between 0 and 60 percent with a scan tool. The test lamp should turn ON and OFF after a 10
second delay.
瀚慖f the test lamp does not turn ON and OFF, refer to Generator Battery Vent Fan Relay test.
7. Connect a DMM between the control circuit terminal 4 and ground.
8. Command the battery vent fan to 60 percent with a scan tool. Test for less than 1 V after a 10 second delay.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the drive motor
generator battery control module.
9. Command the battery vent fan to 0 percent with a scan tool. Switch the DMM to the diode test. The DMM reading should display O.L.
瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuits test normal, replace the drive motor generator
battery control module.
10. Command the battery vent fan to 60 percent with a scan tool. The reading should be less than 3 V.
瀚慖f less than the specified range or displaying O.L., test the control circuit for an open/high resistance. If the circuits test normal, replace
the drive motor generator battery control module.
Generator Battery Vent Fan Relay Test
1. Disconnect the harness connector at the battery vent fan relay.
2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 4 and ground.
瀚慖f the test lamp illuminates, test the control circuit for a short to voltage.
3. Verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
Monday, November 4, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1090
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1090
* Ignition ON.
* Battery voltage is 9.5-17 V.
* The module is powered up and completes initialization.
Conditions for Setting the DTC
C0870 00
The trailer brake circuit reference voltage for the trailer brake control relay is below 4.8 V or above 5.2 V.
C1112 00
* The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the integrated trailer brake relay control
active low circuit.
* The fuel pump/trailer brake control module detects an open in the battery positive voltage circuit to the trailer brake control relay.
* The fuel pump/trailer brake control module detects an open in the ground circuit to the trailer brake control relay.
* The fuel pump/trailer brake control module detects a short to ground or open in the solid state relay enable circuit.
C1113 01
* The fuel pump/trailer brake control module detects a short to voltage in the solid state relay enable circuit.
* The fuel pump/trailer brake control module detects a short to voltage in the trailer brake output supply voltage control circuit.
C1114 00
The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the solid state relay output circuit.
C1119 00
The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the relay feedback circuit.
Action Taken When the DTC Sets
* The trailer brake control will be disabled for the remainder of the ignition cycle.
* The driver information center will display Service Trailer Brake System.
Condition for Clearing the DTC
* The condition for the DTC is no longer present.
* The fuel pump/trailer brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Trailer Brake Control Schematics (See: Brakes and Traction Control/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Trailer Brake Controls Description and Operation (See: Powertrain Management/Computers and Control Systems/Description and
Operation/Trailer Brake Controls Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool trailer brake controls user gain parameter. The reading should be between 0-100 percent, and change with
operating the gain switch up or gain switch down.
* Ignition ON.
* Battery voltage is 9.5-17 V.
* The module is powered up and completes initialization.
Conditions for Setting the DTC
C0870 00
The trailer brake circuit reference voltage for the trailer brake control relay is below 4.8 V or above 5.2 V.
C1112 00
* The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the integrated trailer brake relay control
active low circuit.
* The fuel pump/trailer brake control module detects an open in the battery positive voltage circuit to the trailer brake control relay.
* The fuel pump/trailer brake control module detects an open in the ground circuit to the trailer brake control relay.
* The fuel pump/trailer brake control module detects a short to ground or open in the solid state relay enable circuit.
C1113 01
* The fuel pump/trailer brake control module detects a short to voltage in the solid state relay enable circuit.
* The fuel pump/trailer brake control module detects a short to voltage in the trailer brake output supply voltage control circuit.
C1114 00
The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the solid state relay output circuit.
C1119 00
The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the relay feedback circuit.
Action Taken When the DTC Sets
* The trailer brake control will be disabled for the remainder of the ignition cycle.
* The driver information center will display Service Trailer Brake System.
Condition for Clearing the DTC
* The condition for the DTC is no longer present.
* The fuel pump/trailer brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Trailer Brake Control Schematics (See: Brakes and Traction Control/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Trailer Brake Controls Description and Operation (See: Powertrain Management/Computers and Control Systems/Description and
Operation/Trailer Brake Controls Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool trailer brake controls user gain parameter. The reading should be between 0-100 percent, and change with
operating the gain switch up or gain switch down.
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1054
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1054
Ignition ON, observe the scan tool trailer brake controls user gain parameter. The reading should be between 0-100 percent, and change with
operating the gain switch up or gain switch down.
Circuit/System Testing
Note: These diagnostics are based on having no trailer connected.
1. Ignition ON, verify that DTC P2534 is not set.
瀚慖f the DTC is set, refer to DTC P2534 (See: P Code Charts/P2534/Wiring Systems and Power Management).
2. Ignition OFF, disconnect the harness connector at the solid state relay.
3. Test for less than 5 ohm between the ground circuit terminal B and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal F and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the
STUD 2 fuse is open, replace the trailer brake control relay.
5. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and ground.
瀚慖f test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control module.
6. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and B+.
瀚慖f test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the trailer brake control module.
7. Ignition ON, test for 3.2-4.1 V between the control circuit terminal C and ground.
瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the trailer brake control module.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
8. Ignition ON, test for 3.2-4.1 V between the control circuit terminal A and ground.
瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the trailer brake control module.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
9. Ignition ON, test for less than 1 V between the control circuit terminal D and ground.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
10. If all circuits test normal, replace the trailer brake solid state relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Trailer Brake Control Relay Replacement (1500) (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Towing
Relay/Service and Repair/Trailer Brake Control Relay Replacement (1500))Trailer Brake Control Relay Replacement (2500) (See:
Accessories and Optional Equipment/Towing / Trailer System/Trailer Towing Relay/Service and Repair/Trailer Brake Control Relay
Replacement (2500))
* Trailer Brake Control Module Replacement (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Brake Control
Module/Service and Repair/Trailer Brake Control Module Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for TBCM replacement, setup, and programming
Gasoline Without LY6
DTC C0870, C1112, C1113, C1114, or C1119 (Gasoline Without LY6)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Ignition ON, observe the scan tool trailer brake controls user gain parameter. The reading should be between 0-100 percent, and change with
operating the gain switch up or gain switch down.
Circuit/System Testing
Note: These diagnostics are based on having no trailer connected.
1. Ignition ON, verify that DTC P2534 is not set.
瀚慖f the DTC is set, refer to DTC P2534 (See: P Code Charts/P2534/Wiring Systems and Power Management).
2. Ignition OFF, disconnect the harness connector at the solid state relay.
3. Test for less than 5 ohm between the ground circuit terminal B and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition OFF, verify that a test lamp illuminates between the B+ circuit terminal F and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the
STUD 2 fuse is open, replace the trailer brake control relay.
5. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and ground.
瀚慖f test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control module.
6. Ignition ON, verify that a test lamp does not illuminate between control circuit terminal E and B+.
瀚慖f test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the trailer brake control module.
7. Ignition ON, test for 3.2-4.1 V between the control circuit terminal C and ground.
瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the trailer brake control module.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
8. Ignition ON, test for 3.2-4.1 V between the control circuit terminal A and ground.
瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the trailer brake control module.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
9. Ignition ON, test for less than 1 V between the control circuit terminal D and ground.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
10. If all circuits test normal, replace the trailer brake solid state relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Trailer Brake Control Relay Replacement (1500) (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Towing
Relay/Service and Repair/Trailer Brake Control Relay Replacement (1500))Trailer Brake Control Relay Replacement (2500) (See:
Accessories and Optional Equipment/Towing / Trailer System/Trailer Towing Relay/Service and Repair/Trailer Brake Control Relay
Replacement (2500))
* Trailer Brake Control Module Replacement (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Brake Control
Module/Service and Repair/Trailer Brake Control Module Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for TBCM replacement, setup, and programming
Gasoline Without LY6
DTC C0870, C1112, C1113, C1114, or C1119 (Gasoline Without LY6)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1040
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1040
* Ignition ON.
* System voltage 10.5-18.5 V.
Conditions for Setting the DTC
The voltage above 18.5 volts, or below 10.5 volts, and a mode shift is requested.
Action Taken When the DTC Sets
* Shifting is disabled until the voltages change to be within the specifications.
* The SERVICE 4WD will illuminate for the remainder of the ignition cycle.
Conditions for Clearing the DTC
* The TCCM clears the DTC once the conditions for setting the DTC are no longer exist.
* A history DTC clears after 40 consecutive warm up cycles without a fault present.
* History DTCs can be cleared using a scan tool.
Diagnostic Aids
* Any mode shift requested when the battery voltage is below 12 V may set this DTC.
* Improperly connecting the cables during a jump start can cause C0896 07 to set.
* The Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and Inspection/Symptom Related
Diagnostic Procedures/MP 3010-NP0/Transfer Case High/Low Clutch Reset) procedure may need to be performed after repair.
* EL-49742 - harness is a good source for B+ and ground.
Reference Information
Schematic Reference
Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3010-NP0 - Transfer Case)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.
Special Tools
* EL-49742 - Battery Voltage B+ and Ground Source Harness
* J 35616 - GM-Approved Terminal Test Kit
Circuit/System Verification
1. Verify that the TREC fuse, and the Miscellaneous IGN fuse, underhood fuse block, are not open.
瀚慖f the TREC fuse is open, test the battery positive voltage circuit, TCCM harness X3 pin C, for a short to ground.
瀚慖f the Miscellaneous IGN fuse is open, test the ignition 1 voltage circuit, TCCM harness X2 pin 6, for a short to ground.
2. Ignition ON, engine OFF.
3. Using the Freeze Frame feature of the scan tool, review the Battery Voltage parameter when the DTC sets. The voltage should be above 12.0
V.
瀚慖f the voltage is above 18.5 V, this is likely a vehicle issue such as an alternator problem, or the vehicle has been hooked up improperly
during a jump start. Refer to Symptoms - Engine Electrical (See: Starting and Charging/Testing and Inspection/Symptom Related
Diagnostic Procedures/Symptoms - Engine Electrical).
瀚慖f the voltage is below 12.0 V, ensure that the battery is fully charged and working properly. Refer to Battery Inspection/Test (See:
Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test), Battery Common
Causes of Malfunction (See: Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Common
* Ignition ON.
* System voltage 10.5-18.5 V.
Conditions for Setting the DTC
The voltage above 18.5 volts, or below 10.5 volts, and a mode shift is requested.
Action Taken When the DTC Sets
* Shifting is disabled until the voltages change to be within the specifications.
* The SERVICE 4WD will illuminate for the remainder of the ignition cycle.
Conditions for Clearing the DTC
* The TCCM clears the DTC once the conditions for setting the DTC are no longer exist.
* A history DTC clears after 40 consecutive warm up cycles without a fault present.
* History DTCs can be cleared using a scan tool.
Diagnostic Aids
* Any mode shift requested when the battery voltage is below 12 V may set this DTC.
* Improperly connecting the cables during a jump start can cause C0896 07 to set.
* The Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and Inspection/Symptom Related
Diagnostic Procedures/MP 3010-NP0/Transfer Case High/Low Clutch Reset) procedure may need to be performed after repair.
* EL-49742 - harness is a good source for B+ and ground.
Reference Information
Schematic Reference
Transfer Case Control Schematics (See: Transmission and Drivetrain/Transfer Case/Diagrams/Electrical Diagrams/MP 3010-NP0 - Transfer Case)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.
Special Tools
* EL-49742 - Battery Voltage B+ and Ground Source Harness
* J 35616 - GM-Approved Terminal Test Kit
Circuit/System Verification
1. Verify that the TREC fuse, and the Miscellaneous IGN fuse, underhood fuse block, are not open.
瀚慖f the TREC fuse is open, test the battery positive voltage circuit, TCCM harness X3 pin C, for a short to ground.
瀚慖f the Miscellaneous IGN fuse is open, test the ignition 1 voltage circuit, TCCM harness X2 pin 6, for a short to ground.
2. Ignition ON, engine OFF.
3. Using the Freeze Frame feature of the scan tool, review the Battery Voltage parameter when the DTC sets. The voltage should be above 12.0
V.
瀚慖f the voltage is above 18.5 V, this is likely a vehicle issue such as an alternator problem, or the vehicle has been hooked up improperly
during a jump start. Refer to Symptoms - Engine Electrical (See: Starting and Charging/Testing and Inspection/Symptom Related
Diagnostic Procedures/Symptoms - Engine Electrical).
瀚慖f the voltage is below 12.0 V, ensure that the battery is fully charged and working properly. Refer to Battery Inspection/Test (See:
Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test), Battery Common
Causes of Malfunction (See: Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Common
Tuesday, October 29, 2019
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1482
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1482
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B93
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B93
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
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2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1444
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1444
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B73
DTC P0B3C, P0B41, P0B46, P0B4B, P0B50, P0B55, P0B5A, P0B5F, P0B64, P0B69, P0B6E, P0B73, P0B78, P0B7D, P0B82, P0B87, P0B8C,
P0B91, P0B96, or P0B9B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B73
DTC P0B3C, P0B41, P0B46, P0B4B, P0B50, P0B55, P0B5A, P0B5F, P0B64, P0B69, P0B6E, P0B73, P0B78, P0B7D, P0B82, P0B87, P0B8C,
P0B91, P0B96, or P0B9B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
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2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1334
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1334
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B4D
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5
V of each other.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0B4D
DTC P0B3E, P0B43, P0B48, P0B4D, P0B52, P0B57, P0B5C, P0B61, P0B66, P0B6B, P0B70, P0B75, P0B7A, P0B7F, P0B84, P0B89, P0B8E,
P0B93, P0B98, or P0B9D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1291
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1291
* Ignition ON.
* Motor temperature is greater than -40锟斤拷C (-40锟斤拷F).
锟斤拷If motor temperature is less than -40锟斤拷C (-40锟斤拷F) at Ignition ON, the drive motor must operate at greater than 20 Nm (14.75 lb ft) for a
cumulative time of 1.5 minutes before the DTC will run.
Conditions for Setting the DTC
P0AEE, P0AF3, P0BD2, P0BD7, P0BDC, and P0BE1
* A 15锟斤拷C ( 27锟斤拷F) difference is observed between the individual inverter phase temperature sensor and the average of all the inverter phase
temperatures.
* The above condition is present for 4 seconds.
P0AEF, P0AF4, P0BD3, P0BD8, P0BDD, and P0BE2
The inverter phase temperature sensor is greater than 125锟斤拷C (275锟斤拷F) for 3 seconds.
P0AF0, P0AF5, P0BD4, P0BD9, P0BDE, and P0BE3
The inverter phase temperature sensor is less than -40锟斤拷C (-40锟斤拷F) for 3 seconds.
Action Taken When the DTC Sets
* DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE,
P0BE1, P0BE2 AND P0BE3 are Type B DTCs.
* The PIM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE, P0BE1,
P0BE2 AND P0BE3 are Type B DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Clear the DTC information.
2. Ignition OFF for 1 minute.
3. Operate the vehicle under the Conditions for Running the DTC.
4. Retest for DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD,
P0BDE, P0BE1, P0BE2 AND P0BE3.
Circuit/System Testing
Program the PIM with the latest software version and recheck for DTCs.
If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
P0BE3
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
* Ignition ON.
* Motor temperature is greater than -40锟斤拷C (-40锟斤拷F).
锟斤拷If motor temperature is less than -40锟斤拷C (-40锟斤拷F) at Ignition ON, the drive motor must operate at greater than 20 Nm (14.75 lb ft) for a
cumulative time of 1.5 minutes before the DTC will run.
Conditions for Setting the DTC
P0AEE, P0AF3, P0BD2, P0BD7, P0BDC, and P0BE1
* A 15锟斤拷C ( 27锟斤拷F) difference is observed between the individual inverter phase temperature sensor and the average of all the inverter phase
temperatures.
* The above condition is present for 4 seconds.
P0AEF, P0AF4, P0BD3, P0BD8, P0BDD, and P0BE2
The inverter phase temperature sensor is greater than 125锟斤拷C (275锟斤拷F) for 3 seconds.
P0AF0, P0AF5, P0BD4, P0BD9, P0BDE, and P0BE3
The inverter phase temperature sensor is less than -40锟斤拷C (-40锟斤拷F) for 3 seconds.
Action Taken When the DTC Sets
* DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE,
P0BE1, P0BE2 AND P0BE3 are Type B DTCs.
* The PIM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE, P0BE1,
P0BE2 AND P0BE3 are Type B DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Clear the DTC information.
2. Ignition OFF for 1 minute.
3. Operate the vehicle under the Conditions for Running the DTC.
4. Retest for DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD,
P0BDE, P0BE1, P0BE2 AND P0BE3.
Circuit/System Testing
Program the PIM with the latest software version and recheck for DTCs.
If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
P0BE3
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Saturday, October 26, 2019
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1258
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1258
Ignition ON, command the battery pack vent fan speed to 60 percent duty cycle with a scan tool. The battery pack vent fan should turn ON after
approximately a 10 second delay.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must
be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
Note: Perform the Generator Battery Vent Fan test first
Generator Battery Vent Fan Test
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Ignition OFF, disconnect the generator battery vent fan.
3. Connect the 12 V battery.
4. Test for less than 5 ohm between the generator battery vent fan ground circuit terminal 3 and ground
锟斤拷If greater than the specified range, test the ground circuit for an open/high resistance.
5. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 3.
6. Command the battery pack vent fan speed between 0 and 60 percent with a scan tool. The test lamp should turn ON and OFF after a 10
second delay.
锟斤拷If the test lamp does not turn ON and OFF, refer to Generator Battery Vent Fan Relay test.
7. Connect a DMM between the control circuit terminal 4 and ground.
8. Command the battery vent fan to 60 percent with a scan tool. Test for less than 1 V after a 10 second delay.
锟斤拷If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the drive motor
generator battery control module.
9. Command the battery vent fan to 0 percent with a scan tool. Switch the DMM to the diode test. The DMM reading should display O.L.
锟斤拷If less than the specified value, test the control circuit for a short to ground. If the circuits test normal, replace the drive motor generator
battery control module.
10. Command the battery vent fan to 60 percent with a scan tool. The reading should be less than 3 V.
锟斤拷If less than the specified range or displaying O.L., test the control circuit for an open/high resistance. If the circuits test normal, replace
the drive motor generator battery control module.
Generator Battery Vent Fan Relay Test
1. Disconnect the harness connector at the battery vent fan relay.
2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 4 and ground.
锟斤拷If the test lamp illuminates, test the control circuit for a short to voltage.
3. Verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
Ignition ON, command the battery pack vent fan speed to 60 percent duty cycle with a scan tool. The battery pack vent fan should turn ON after
approximately a 10 second delay.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must
be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
Note: Perform the Generator Battery Vent Fan test first
Generator Battery Vent Fan Test
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Ignition OFF, disconnect the generator battery vent fan.
3. Connect the 12 V battery.
4. Test for less than 5 ohm between the generator battery vent fan ground circuit terminal 3 and ground
锟斤拷If greater than the specified range, test the ground circuit for an open/high resistance.
5. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 3.
6. Command the battery pack vent fan speed between 0 and 60 percent with a scan tool. The test lamp should turn ON and OFF after a 10
second delay.
锟斤拷If the test lamp does not turn ON and OFF, refer to Generator Battery Vent Fan Relay test.
7. Connect a DMM between the control circuit terminal 4 and ground.
8. Command the battery vent fan to 60 percent with a scan tool. Test for less than 1 V after a 10 second delay.
锟斤拷If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the drive motor
generator battery control module.
9. Command the battery vent fan to 0 percent with a scan tool. Switch the DMM to the diode test. The DMM reading should display O.L.
锟斤拷If less than the specified value, test the control circuit for a short to ground. If the circuits test normal, replace the drive motor generator
battery control module.
10. Command the battery vent fan to 60 percent with a scan tool. The reading should be less than 3 V.
锟斤拷If less than the specified range or displaying O.L., test the control circuit for an open/high resistance. If the circuits test normal, replace
the drive motor generator battery control module.
Generator Battery Vent Fan Relay Test
1. Disconnect the harness connector at the battery vent fan relay.
2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 4 and ground.
锟斤拷If the test lamp illuminates, test the control circuit for a short to voltage.
3. Verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
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