Circuit Description
The instrument panel cluster (IPC) illuminates the traction off indicator by supplying ground to the lamp. The electronic brake control module (EBCM) sends serial data messages to the IPC to command the indicator ON or OFF.
Diagnostic Aids
The malfunction must be present during diagnosis in order to prevent unnecessary parts replacement. Always begin diagnosis with Diagnostic System Check - ABS .
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics 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 the traction off indicator illuminate for approximately 2 seconds and then turn OFF? | Go to Diagnostic Aids | Go to Step 3 |
Does the traction off indicator turn OFF? | Go to Step 5 | Go to Step 4 | |
4 | Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 6 | -- |
5 |
Important: Following EBCM replacement, perform the set-up procedure for the EBCM and use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | Go to Step 6 | -- |
6 |
Does the traction off indicator illuminate for approximately 2 seconds and then turn OFF? | System OK | Go to Step 3 |
