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 trailer brake control
module.
9. Ignition ON, test for less than 1 V between the control circuit terminal D and ground.
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 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 C0880, C0890, C1115, C1116, C1117, or C1118 (Gasoline Without LY6)
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 C0880 00
- Device Voltage Reference Output 2 Circuit
DTC C0890 00
- Device Voltage Reference Output 3 Circuit
DTC C1115 08
- Manual Trailer Brake Apply Request Switch Signal Invalid
DTC C1115 5A
- Manual Trailer Brake Apply Request Switch Signal Plausibility Failure
DTC C1116 00
- Manual Trailer Brake Apply Request Signal 1
DTC C1117 00
- Manual Trailer Brake Apply Request Signal 2
DTC C1118 00
- Trailer Brake Control Sensitivity Switch Circuit
DTC C1118 08
- Trailer Brake Control Sensitivity Switch Circuit Signal Invalid
Diagnostic Fault Information
