2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1025

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1025

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 trailer brake control module.

7. Verify the scan tool Redundant Manual Apply Switch parameter is greater than 90 percent.

瀚慖f 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.

瀚慖f 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.

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 trailer brake control module.

瀚慖f 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