Circuit Description
The Traction Off indicator is controlled by the instrument cluster via serial data messages from the body control module (BCM). When the traction control system (TCS) switch is pressed, the BCM commands the instrument cluster to turn ON the Traction Off indicator.
Diagnostic Aids
The malfunction must be present during diagnosis in order to prevent unnecessary parts replacement. Always begin diagnosis with the Diagnostic System Check - Vehicle.
Test Description
The number below refers to the step number on the diagnostic table.
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This step tests if the instrument panel cluster (IPC) is able to turn ON the Traction Off indicator.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Body Control System Connector End Views Body Control System | |||
1 | Did you perform the ABS Diagnostic System Check? | Go to Step 2 | |
2 |
Does the Traction Off indicator turn ON? | Go to Step 3 | Go to Step 6 |
3 |
Does the Traction Off indicator illuminate? | Go to Step 4 | Go to Step 5 |
4 | Replace the TCS switch. Refer to Electronic Traction Control Switch Replacement . Did you complete the replacement? | Go to Step 8 | -- |
5 | Test for an open in the TCS switch signal circuit. Refer to Circuit Testing in Wiring Systems. Did you find and correct the condition? | Go to Step 8 | Go to Step 7 |
6 | Replace the IPC. Refer to Instrument Cluster Replacement in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | -- |
7 | Replace the body control module (BCM). Refer to Body Control Module Replacement in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 8 | -- |
8 |
Does the Traction Off indicator illuminate for 2 seconds and then turn OFF? | System OK | Go to Step 2 |
