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. The BCM supplies a low current, 12-volt signal to the TCS requested indicator control circuit when the LED is commanded OFF. The BCM monitors the feedback from this signal to detect opens or shorts to voltage in the LED control circuitry.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The BCM is commanding the traction control switch LED OFF. |
Conditions for Setting the DTC
The BCM detects high voltage on the LED control circuit when the TCS requested indicator is switched OFF.
Action Taken When the DTC Sets
The BCM sets DTC B0828 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 open or short to voltage 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 may not illuminate when the traction control switch is pressed, or may remain illuminated whenever the ignition is ON.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics and Body Control System Schematics in Body Control System Connector End View Reference: Antilock Brake System Connector End Views and Body Control System Connector End Views in Body Control System | |||
1 | Did you perform the ABS Diagnostic System Check? | Go to Step 2 | |
2 |
Does DTC B0828 set as a Current DTC? | Go to Step 3 | Go to Diagnostic Aids |
3 | Observe the traction control switch LED. Is the traction control switch LED illuminated? | Go to Step 4 | Go to Step 5 |
4 | Test the traction control switch (TCS) requested indicator control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 |
5 |
Does the DTC set? | Go to Step 6 | Go to Step 9 |
6 | Test the TCS requested indicator control circuit and the traction control switch ground circuit for opens. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
7 | Test for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 |
8 |
Important: Perform the setup procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control Systems. Did you complete the replacement? | Go to Step 11 | -- |
9 | Test for poor connections at the harness connector of the traction control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
10 | Replace the traction control switch. Refer to Accessory Switch Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 3 | System OK |
