2010 Cadillac Truck Escalade AWD V8-6.2L Page 1025
锟斤拷If 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 trailer brake control module.
7. Verify the scan tool Redundant Manual Apply Switch parameter is greater than 90 percent.
锟斤拷If less than the specified range, test the signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the trailer brake
control module.
8. Install a 3 A fused jumper wire between the signal circuit terminal 5 and the 5 V reference circuit terminal 3. Verify the scan tool Redundant
Manual Apply Switch parameter is less than 2 percent.
锟斤拷If greater 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 trailer brake control module.
9. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 6 and ground.
锟斤拷If 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 trailer brake control module.
锟斤拷If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the trailer brake control
module.
10. If all circuits test normal, test or replace the trailer brake controller switch panel.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Trailer Brake Control Switch Replacement (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Brake Control
Module/Service and Repair/Trailer Brake Control Switch Replacement)
* 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
Lighting
DTC C0277, C0297, or C0890
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 C0277 06
- Brake Pedal Position Sensor Circuit Short to Ground or Open
DTC C0277 07
- Brake Pedal Position Sensor Circuit Voltage Above Threshold
DTC C0277 09
- Brake Pedal Position Sensor Circuit Rate of Change Above Threshold
DTC C0277 4B
- Brake Pedal Position Sensor Calibration Not Learned
DTC C0297 00
- Brake Applied Output Circuit
DTC C0890 03
- Device Voltage Reference Output 3 Circuit Voltage Below Threshold
DTC C0890 07
- Device Voltage Reference Output 3 Circuit Voltage Above Threshold
