2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1055

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1055

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.

C1112 00

* The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the integrated trailer brake relay control

active low circuit.

* The fuel pump/trailer brake control module detects an open in the battery positive voltage circuit to the trailer brake control relay.

* The fuel pump/trailer brake control module detects an open in the ground circuit to the trailer brake control relay.

* The fuel pump/trailer brake control module detects a short to ground or open in the solid state relay enable circuit.

C1113 01

* The fuel pump/trailer brake control module detects a short to voltage in the solid state relay enable circuit.

* The fuel pump/trailer brake control module detects a short to voltage in the trailer brake output supply voltage control circuit.

C1114 00

The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the solid state relay output circuit.