ABS Indicator Inoperative

ABS Indicator Inoperative





Circuit Description
The Electronic Brake Control Module (EBCM) controls the operation of the amber ABS indicator lamp by means of a lamp driver module. When the ignition switch is turned to the ON position, the EBCM turns ON the ABS indicator for 3 seconds for a bulb check. Whenever a malfunction is detected within the ABS system, the EBCM turns ON the ABS indicator, notifying the driver that ABS needs to be serviced.

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 in the ABS indicator control circuit.
^ A malfunctioning lamp driver module.
^ An internal EBCM malfunction.
If an intermittent malfunction exists, refer to Testing for Intermittent and Poor Connections.

Test Description
The number below refers to the step number on the diagnostic table.
3. Determines if the malfunction is caused by an internal EBCM malfunction.