Circuit Description
The red BRAKE warning lamp is supplied ignition voltage through the GAUGES fuse. The BRAKE warning lamp can be illuminated by the EBCM, Brake Pressure Differential Switch or by the Park Brake Switch.
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 circuit supposed to be illuminated |
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 typically sets because of a shorted red BRAKE warning lamp. Yet DTC C0288 can also set because of a short to voltage in the wiring between the red BRAKE warning lamp and the EBCM.
Test Description
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Determines if the BRAKE warning lamp circuit is operating properly when controlled by the EBCM.
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Determines if the BRAKE warning lamp circuit is operating properly without the EBCM.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the ABS Diagnostic System Check performed? | -- | Go to ABS Diagnostic System Check | |||||||
Did the BRAKE warning lamp turn on and then off after three seconds? | -- | |||||||||
Does the BRAKE warning lamp turn on? | -- | |||||||||
4 | Inspect the jumper wire fuse. Is the fuse open? | -- | ||||||||
5 | Malfunction is intermittent, Perform the following:
Is repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
6 | Replace the EBCM. Is repair complete? | -- | Go to Diagnostic System Check | -- | ||||||
7 | Repair a short to voltage in CKT 33 or CKT 680. Is repair complete? | -- | Go to Diagnostic System Check | -- |
