Traction Control/Stability Control Indicator Malfunction

Traction Control/Stability Control Indicator Malfunction (With LSA)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

The traction control switch for the CTS-V is located on the steering wheel. When the switch is pressed, the signal circuit from the body control module (BCM) is pulled low through a series of resisters indicating the traction control disable command. In response to this signal, the BCM sends a serial data message to the electronic brake control module (EBCM) to disable the traction control system. When the traction control switch is pressed and held for 5 seconds, the BCM sends a serial data message to the EBCM commanding it to disable the stability control. After the EBCM disables the stability control, it sends a serial data message to the instrument cluster requesting it to turn the traction control indicator OFF and turn stability off indicator ON.

Reference Information

Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views A/C Compressor Clutch

Description and Operation

ABS Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool BCM, SWC Bank 1 Status parameter while pressing the traction control switch. The reading should change between Idle and Switch 6.

If not the specified value, refer to Steering Wheel Controls Malfunction Steering Wheel Controls Malfunction.

If the reading changes between Idle and Switch 6, the traction control is inoperative, and there are NO other DTCs set, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Control Module References for EBCM replacement, programming and setup