2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1060

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1060

* 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 C0870, C1112, C1113, C1114, or C1119 (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 C0870 00

- Device Voltage Reference Output 1 Circuit

DTC C1112 00

- Trailer Brake Control Relay Low Control Circuit

DTC C1113 01

- Trailer Brake Control Relay High Control Circuit Short to Battery

DTC C1114 00

- Trailer Brake Control Solenoids Control Circuit

DTC C1119 00

- Trailer Brake Control Relay Feedback Circuit

Diagnostic Fault Information

Circuit/System Description

The trailer brake control relay receives inputs from the fuel pump/trailer brake control module, these inputs are used to determine the amount of

voltage the relay will supply to the trailer brakes.

Conditions for Running the DTC

* Ignition ON.

* Battery voltage is 9.5-17 V.

* The module is powered up and completes initialization.

Conditions for Setting the DTC

C0870 00

The trailer brake circuit reference voltage for the trailer brake control relay is below 4.8 V or above 5.2 V.