Circuit Description
When TCS is enabled, the TRAC LED request from the EBTCM to the BCM (circuit 832) is at battery voltage and the BCM grounds circuit 1660. This action turns the TRAC LED ON, indicating that TCS is available.
When the driver disables TCS by depressing the TRAC switch, the EBTCM grounds circuit 832. In response, the BCM turns the LED OFF by removing the ground on circuit 1660.
DTC Parameters
Important: The EBTCM does not test circuit 832 for malfunction.
Important: DTC B0828 will not illuminate a telltale.
DTC B0827 will set if the driver presses the TRAC switch with the ignition in Run and circuit 1660 is open or shorted to voltage.
Diagnostic Aids
Inspect wiring, components, and connectors for the following conditions:
| • | Proper connection |
| • | Backed-out terminals |
| • | Broken connector locks |
| • | Corrosion in connectors/terminals |
| • | Burned, chafed or pinched wires |
| • | Broken wire inside insulation |
| • | Loose components |
Step | Action | Yes | No |
|---|---|---|---|
Connector End View Reference: Antilock Brake System Connector End Views . | |||
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 LED control circuit for a short to voltage. Refer to and 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 LED 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 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 Electronic Traction Control Switch Replacement . Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 3 | System OK |
