Circuit Description
The electronic brake control module (EBCM) turns ON the Low Trac indicator by grounding the EBCM Low Trac indicator control circuit. When the EBCM detects that the traction control system is activated, the Low Trac indicator will illuminate.
Diagnostic Aids
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.
The following are possible causes of the malfunction:
| • | An open or high resistance in the Low Trac indicator control circuit |
| • | An internal EBCM malfunction |
| • | A malfunctioning instrument cluster panel assembly. |
If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .
Test Description
The number below refer 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 Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Do any of the other instrument cluster indicators or gages function? | Go to Step 3 | Go to Gages Inoperative - All |
Does the vehicle stability control (VSC) indicator turn ON? | Go to Step 6 | Go to Step 4 | |
4 | Test the Low Trac indicator control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 5 |
5 | Replace the instrument panel cluster assembly. Refer to Instrument Cluster Replacement . Did you complete the replacement? | Go to Step 7 | -- |
6 | Replace the brake pressure modulator valve (BPMV). Refer to Brake Pressure Modulator Valve Assembly Replacement . Is the repair complete? | Go to Step 7 | -- |
7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
