B0827

DTC B0827

Circuit Description
After the traction control switch (TCS) is pressed and released, the LED on the switch illuminates. The body control module (BCM) illuminates the LED by supplying adequate current to the high side of the LED.

DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B0827 Traction Control System Off Indicator Circuit Low

Conditions for Running the DTC
^ The ignition is ON.
^ The body control module (BCM) is commanding the traction control switch LED ON.

Conditions for Setting the DTC
The BCM detects low voltage on the TCS requested indicator control circuit when the LED is switched ON.

Action Taken When the DTC Sets
The BCM sets DTC B0827 as a current DTC for as long as the condition is present.

Conditions for Clearing the DTC
The DTC clears automatically from Current status when the fault is corrected or when the Conditions for Running the DTC are not being met. Use a scan tool to clear the DTC from History status.

Diagnostic Aids
An intermittent short to ground on the TCS requested indicator control circuit is the most likely cause of a history DTC when no problem is found. When the Conditions for Setting this DTC are present, the traction control switch LED cannot illuminate.





Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This step tests for a short in the traction control switch. Normally, DTC B0828 sets when the TCS requested indicator control circuit is opened.