Circuit Description
The Traction Off message on the driver information center (DIC) is controlled by the instrument panel cluster (IPC) via serial data messages from the electronic brake control module (EBCM). When the instrument panel module (IPM) sees the traction control switch input grounded through the momentary traction control switch, it sends a serial data message to the EBCM that tells the EBCM that the traction control switch has been pressed. The EBCM then disables traction control and sends a serial data message to the IPC to display the Traction Off message on the DIC. Each time the ignition is cycled from OFF to ON, the traction control system (TCS) is enabled.
Step | Action | Yes | No | ||||
|---|---|---|---|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views or Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console | |||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | ||||
2 |
Does the TCS Switch parameter change state? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||
3 | Does the scan indicate that the TCS Switch parameter is On? | Go to Step 4 | Go to Step 5 | ||||
4 |
Does the scan tool display Off? | Go to Step 10 | Go to Step 6 | ||||
5 |
Does the scan tool display On? | Go to Step 10 | Go to Step 7 | ||||
6 | Test the signal circuit of the traction control switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 | ||||
7 | Test the signal circuit of the traction control switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 8 | ||||
8 | Test the ground circuit of the traction control switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 | ||||
9 | Inspect for poor connections at the harness connector of the instrument panel module (IPM). 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 13 | Go to Step 11 | ||||
10 | Inspect 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 13 | Go to Step 12 | ||||
11 | Replace the IPM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 13 | -- | ||||
12 | Replace the traction control switch. Refer to the appropriate replacement:
Did you complete the replacement? | Go to Step 13 | -- | ||||
13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 | ||||
