2010 Cadillac Truck SRX FWD V6-3.0L Page 1781

2010 Cadillac Truck SRX FWD V6-3.0L Page 1781

The electronic brake control module (EBCM) and the engine control module (ECM) simultaneously control the traction control. The ECM reduces

the amount of torque supplied to the drive wheels and the EBCM actively applies the brakes to the front wheels in order to reduce torque. The

EBCM sends a GMLAN serial data message to the engine control module (ECM) indicating the function that has been requested.

Conditions for Running the DTC

* The ignition is ON.

* The DTCs run continuously once the above condition is met.

Conditions for Setting the DTC

The ECM detects an invalid signal from the EBCM.

Action Taken When the DTC Sets

DTC P0856 is a Type C DTC.

Conditions for Clearing the DTC

DTC P0856 is a Type C DTC.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Circuit/System Verification

1. Observe the Freeze Frame/Failure Records with a scan tool.

2. Clear the DTCs with a scan tool.

3. Ignition OFF for 30 seconds.

4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

瀚慖f DTC P0856 failed this ignition, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming.

P0872

DTC P0872 or P0873

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 P0872

- Transmission Fluid Pressure (TFP) Switch 3 Circuit Low Voltage

DTC P0873

- Transmission Fluid Pressure (TFP) Switch 3 Circuit High Voltage

Diagnostic Fault Information