Circuit Description
The EBCM controls the ABS indicator lamp illumination by supplying a ground to terminal B. When the vehicle is started or the ignition is turned to the RUN position, the ABS indicator should illuminate for two seconds and turn off.
Diagnostic Aids
If the ABS indicator lamp is on always with no DTCs set (never turns off after two seconds with the vehicle started or with the ignition switch in the RUN position), there is a short to ground in CKT 867 between the instrument cluster and the EBCM or the EBCM is internally shorted to ground.
Test Description
The numbers below refer to the steps in the diagnostic table:
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | |
Does the ABS indicator lamp turn on? | -- | Go to Step 3 | Go to Step 4 | |
3 | Repair the short to ground in CKT 867. Is the repair complete? | -- | -- | |
4 |
Is the ABS indicator lamp on constantly? | -- | Go to Step 5 | Malfunction is intermittent. Go to Diagnostic Aids |
5 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | -- |
