Circuit Description
The red BRAKE warning lamp is supplied ignition voltage through the GAUGES fuse. The EBCM illuminates the brake warning lamp.
Conditions for Setting the DTC
| • | High voltage is present on the BRAKE warning lamp circuit when the circuit is expected to be low (lamp commanded on by the EBCM). |
| • | Anything that keeps the BRAKE warning lamp circuit high when the lamp is supposed to be illuminated (such as a short to voltage on CKT 33.) |
Action Taken When the DTC Sets
No action taken, the ABS is not disabled.
Conditions for Clearing the MIL/DTC
| • | Repair the conditions responsible for setting the DTC. |
| • | Use the Scan Tool Clear DTCs function. |
Diagnostic Aids
DTC C0288 is usually set by a short to voltage in the wiring between the brake warning lamp and the EBCM.
Test Description
The numbers below refer to the steps in the diagnostic table.
-
This step determines if the BRAKE warning lamp circuit is operating properly when controlled by the EBCM.
-
This step determines if the BRAKE warning lamp circuit is operating properly without the EBCM.
-
This step decides between a constant or intermittent short to voltage condition.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Step 2 | |
Did the BRAKE warning lamp turn on and then off after two seconds? | -- | Go to Step 5 | Go to Step 3 | |
3 |
Does the BRAKE warning lamp turn on? | -- | Go to Step 6 | Go to Step 4 |
Inspect the jumper wire fuse. Is the fuse open? | -- | Go to Step 7 | Go to Step 5 | |
Is the repair complete? | -- | -- | ||
6 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | -- | |
7 | Repair a short to voltage in CKT 33. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- |
