ABS Indicator Always On

ABS Indicator Always On

Step 1-6:

Circuit Description
The Electronic Brake Control Module (EBCM) turns ON the Antilock Brake System (ABS) indicator by grounding the ABS indicator control circuit. When the ignition switch is turned to the ON position, the EBCM turns ON the ABS indicator for 3 seconds for a bulb check. If the EBCM detects a malfunction, the ABS indicator will stay ON to warn the driver that the ABS is disabled and needs service.

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 short to ground in the ABS indicator control circuit
- An internal EBCM malfunction
- An internal IPC malfunction If an intermittent malfunction exists, refer to Testing for Intermittent and Poor Connections Diagnostic Aids.

Test Description
The numbers in the image, refer to step numbers on the diagnostic table.
3. This step tests the EBCM ABS off warning lamp circuit for a short to ground.