GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The brake can be overheated when the traction control system (TCS) controls the brake system to reduce the velocity of the driving wheel. At this moment, the electronic brake control module (EBCM) calculates the brake application time and frequency and shows the warning sign of an overheated driving wheel to the driver.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C0931 System Thermal High

Conditions for Running the DTC

    • Vehicle speed is greater than 6 km/h (4 mph) with the brake pedal not applied
        or
    • Vehicle speed is greater than 15 km/h (9 mph) and the brake pedal is actuated.

Conditions for Setting the DTC

The EBCM shows the driving wheel temperature is over 400°C (752°F).

Action Taken When the DTC Sets

The TCS does not function when the DTC C0931 is detected.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.