2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1017

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1017

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))

* Control Module References (See: Testing and Inspection/Programming and Relearning) for fuel pump/trailer brake control module

replacement, setup, and programming

Gasoline With LY6, or Diesel

DTC C0870, C1112, C1113, C1114, or C1119 (Gasoline With LY6, or Diesel)

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 trailer brake control module (TBCM), 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