2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 769
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
Brake Boost Solenoid
DTC C012F, C12A7, C12DC, or C12DD
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 C012F 00
- Brake Boost Solenoid Valve Circuit
DTC C012F 0E
- Brake Boost Solenoid Valve Circuit Shorted
DTC C12A7
- Brake Boost Solenoid Valve Circuit Performance
DTC C12DC
- Brake Boost Solenoid Valve Circuit Malfunction
DTC C12DD
- Brake Boost Solenoid Valve Circuit Shorted
Circuit/System Description
The electronic brake control module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability
enhancement system (VSES) event. The boost pressure sensor is internal to the brake pressure modulator valve (BPMV).
Conditions for Running the DTC
* The ignition is ON.
* Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
C012F 00, C12A7, C12DC
Solonoid feedback current greater than 25% of commanded current.
C012F 0E, C12DD
Solonoid feedback current greater than 50% of requested current.
Action Taken When the DTC Sets
Showing posts with label test the ground circuit for an open/high resistance.. Show all posts
Showing posts with label test the ground circuit for an open/high resistance.. Show all posts
Monday, December 9, 2019
Sunday, November 17, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 845
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 845
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+ circuit Terminal 13 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
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/Greater than/Equal to 3900 kg (8600 lb) GVW)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
Brake Pedal Position Sensor 4 Not Plausible
DTC C0277, C120C, C129A, C129B, C129D, C129E, C12B1, or C12F8
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 C0277 03
- BMC Primary Piston Position Sensor A and B Circuit Performance Voltage Below Threshold
DTC C129A
- Brake Pedal Position Sensor 3 Circuit Low
DTC C129D
- Brake Pedal Position Sensor 4 Circuit Low
DTC C0277 07
- BMC Primary Piston Position Sensor A and B Circuit Voltage Above Threshold
DTC C129B
- Brake Pedal Position Sensor 3 Circuit High
DTC C129E
- Brake Pedal Position Sensor 4 Circuit High
DTC C0277 5A
- BMC Primary Piston Position Sensor A and B Circuit Plausibility Failure
DTC C12B1
- ABS Master Cylinder Pressure Sensor and Brake Pedal Position Sensor Not Plausible
DTC C12F8
- Brake Pedal Position Sensor 3 Not Plausible
DTC C120C
- Brake Pedal Position Sensor 4 Not Plausible
Diagnostic Fault Information
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+ circuit Terminal 13 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
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/Greater than/Equal to 3900 kg (8600 lb) GVW)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
Brake Pedal Position Sensor 4 Not Plausible
DTC C0277, C120C, C129A, C129B, C129D, C129E, C12B1, or C12F8
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 C0277 03
- BMC Primary Piston Position Sensor A and B Circuit Performance Voltage Below Threshold
DTC C129A
- Brake Pedal Position Sensor 3 Circuit Low
DTC C129D
- Brake Pedal Position Sensor 4 Circuit Low
DTC C0277 07
- BMC Primary Piston Position Sensor A and B Circuit Voltage Above Threshold
DTC C129B
- Brake Pedal Position Sensor 3 Circuit High
DTC C129E
- Brake Pedal Position Sensor 4 Circuit High
DTC C0277 5A
- BMC Primary Piston Position Sensor A and B Circuit Plausibility Failure
DTC C12B1
- ABS Master Cylinder Pressure Sensor and Brake Pedal Position Sensor Not Plausible
DTC C12F8
- Brake Pedal Position Sensor 3 Not Plausible
DTC C120C
- Brake Pedal Position Sensor 4 Not Plausible
Diagnostic Fault Information
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