Circuit Description
WARNING: This page is about a different car, the 2004 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
The Traction Off message on the DIC is controlled by the instrument cluster via serial data messages from the EBCM. When the 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 instrument cluster to display the Traction Off message on the DIC. Each time the ignition is cycled from OFF to ON, the traction control system is enabled.
Traction Off Indicator Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: ABS Schematics Connector End View Reference: ABS Connector End Views or Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gages, and Console |
|||
| 1 | Did you perform the ABS Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - ABS |
| 2 |
|
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 |
|
Go to Step 10 | Go to Step 6 |
| 5 |
|
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 Instrument Panel Module Replacement
in Body Control System. 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 |