2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 651
瀚慖f the test lamp is always ON, test the control circuit for a short to ground or a sticking horn switch. If the circuit tests normal, replace the
BCM.
瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage, an open high resistance, or a horn switch which is not closing.
If the circuit tests normal, replace the BCM.
4. If all circuits test normal, replace the underhood fuse block.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Underhood Electrical Center or Junction Block Bracket Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and
Repair/Removal and Replacement/Underhood Electrical Center or Junction Block Bracket Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming
B2850
DTC B2850, B2855, B2870, or B2875
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 Descriptor
DTC B2870 01
- Tilt Up Switch Circuit Short to Battery
DTC B2875 01
- Tilt Down Switch Circuit Short to Battery
Diagnostic Fault Information
Circuit Description
The memory seat module (MSM) receives voltage inputs from the tilt switch based on the position of the switch. The MSM then supplies battery
voltage and a ground to the tilt motor control circuits depending on which direction of movement is requested.
Conditions for Running the DTC
The ignition ON.
Conditions for Setting the DTC
The MSM detects a tilt switch input for more than 30 consecutive seconds after the tilt motor movement has stopped.
Action Taken When the DTC Sets
* The tilt motor will be deactivated.
* Memory recall functions will be disabled.
Conditions for Clearing the DTC
* A current DTC will clear when the failed switch input is no longer active.
* A history DTC will clear after 100 ignition cycles.
Showing posts with label 瀚慖f the test lamp is always ON. Show all posts
Showing posts with label 瀚慖f the test lamp is always ON. Show all posts
Wednesday, December 4, 2019
Monday, December 2, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 621
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 621
瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the BCM.
11. If all circuits test normal, test or replace the fog lamp relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
* Front Fog Lamp Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Fog/Driving Lamp/Service and Repair/Removal and
Replacement/Front Fog Lamp Replacement (Tahoe, Avalanche))Front Fog Lamp Replacement (Yukon) (See: Lighting and
Horns/Fog/Driving Lamp/Service and Repair/Removal and Replacement/Front Fog Lamp Replacement (Yukon))Front Fog Lamp
Replacement (PLATINUM) (See: Lighting and Horns/Fog/Driving Lamp/Service and Repair/Removal and Replacement/Front Fog Lamp
Replacement (Platinum))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming
B2540
DTC B2540
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 B2540 02
- Rear Fog Lamp Control Circuit Short to Ground
DTC B2540 05
- Rear Fog Lamp Control Circuit Short to Battery or Open
Diagnostic Fault Information
Circuit/System Description
When the rear fog lamp switch is placed in the ON position, ground is applied to the auxiliary body control module (XBCM) through the rear fog
lamp switch circuit. The XBCM then applies voltage to the rear fog lamp control circuit to the rear fog lamp.
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* Rear fog lamps ON.
Conditions for Setting the DTC
B2540 02
The BCM detects a short to ground in the rear fog lamp switch signal circuit.
瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the BCM.
11. If all circuits test normal, test or replace the fog lamp relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
* Front Fog Lamp Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Fog/Driving Lamp/Service and Repair/Removal and
Replacement/Front Fog Lamp Replacement (Tahoe, Avalanche))Front Fog Lamp Replacement (Yukon) (See: Lighting and
Horns/Fog/Driving Lamp/Service and Repair/Removal and Replacement/Front Fog Lamp Replacement (Yukon))Front Fog Lamp
Replacement (PLATINUM) (See: Lighting and Horns/Fog/Driving Lamp/Service and Repair/Removal and Replacement/Front Fog Lamp
Replacement (Platinum))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming
B2540
DTC B2540
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 B2540 02
- Rear Fog Lamp Control Circuit Short to Ground
DTC B2540 05
- Rear Fog Lamp Control Circuit Short to Battery or Open
Diagnostic Fault Information
Circuit/System Description
When the rear fog lamp switch is placed in the ON position, ground is applied to the auxiliary body control module (XBCM) through the rear fog
lamp switch circuit. The XBCM then applies voltage to the rear fog lamp control circuit to the rear fog lamp.
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* Rear fog lamps ON.
Conditions for Setting the DTC
B2540 02
The BCM detects a short to ground in the rear fog lamp switch signal circuit.
Friday, November 15, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 685
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 685
瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, replace the component with the inoperative backlighting.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Refer to the appropriate replacement procedure for the component causing the condition.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming
B2705
DTC B2705
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 Descriptor
DTC B2705 02
- Gearshift Unlock Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) controls the automatic transmission shift lock control solenoid by providing a battery positive voltage to the
solenoid. The BCM utilizes a smart driver to control the voltage supply circuit to the automatic transmission shift lock control solenoid. The smart
driver monitors the voltage and current flow of the control circuit.
Conditions for Running the DTC
* The ignition switch is in the ON position.
* The brake pedal is pressed.
* The transmission is in the PARK position.
Conditions for Setting the DTC
The DTC sets if there is a short to ground in the automatic transmission shift lock control solenoid control circuit.
Action Taken When the DTC Sets
The BCM will not attempt to enable the voltage supply circuit of the automatic transmission shift lock control solenoid until the next key cycle.
Conditions for Clearing the DTC
* A current DTC B2705 will clear when the malfunction is no longer present and the ignition switch is cycled.
* A history DTC will clear after 100 ignition cycles with no current DTC active during the 100 ignition cycles.
Reference Information
Schematic Reference
Shift Lock Control Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Interlock/Diagrams/Electrical
Diagrams)
Connector End View Reference
瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, replace the component with the inoperative backlighting.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Refer to the appropriate replacement procedure for the component causing the condition.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming
B2705
DTC B2705
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 Descriptor
DTC B2705 02
- Gearshift Unlock Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) controls the automatic transmission shift lock control solenoid by providing a battery positive voltage to the
solenoid. The BCM utilizes a smart driver to control the voltage supply circuit to the automatic transmission shift lock control solenoid. The smart
driver monitors the voltage and current flow of the control circuit.
Conditions for Running the DTC
* The ignition switch is in the ON position.
* The brake pedal is pressed.
* The transmission is in the PARK position.
Conditions for Setting the DTC
The DTC sets if there is a short to ground in the automatic transmission shift lock control solenoid control circuit.
Action Taken When the DTC Sets
The BCM will not attempt to enable the voltage supply circuit of the automatic transmission shift lock control solenoid until the next key cycle.
Conditions for Clearing the DTC
* A current DTC B2705 will clear when the malfunction is no longer present and the ignition switch is cycled.
* A history DTC will clear after 100 ignition cycles with no current DTC active during the 100 ignition cycles.
Reference Information
Schematic Reference
Shift Lock Control Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Interlock/Diagrams/Electrical
Diagrams)
Connector End View Reference
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