C1249

DTC C1249:

DTC C1249

Circuit Description
The electronic brake control module (EBCM) monitors brake pedal position through the stop lamp switch. The stop lamp switch is closed when the brake pedal is pressed and the stop lamp switch opens when the brake pedal is released. When the stop lamp switch is closed, the EBCM receives a voltage signal from the stop lamp switch. The stop lamp switch receives power from the STOP fuse.

Conditions for Running the DTC
DTC C1249 can be set anytime.

Conditions for Setting the DTC
The EBCM detects an open in the stop lamp switch circuit.

Action Taken When the DIC Sets
The EBCM turns ON the ABS indicator. If this DTC sets during an ABS event, the ABS will remain functional until the vehicle stops. Otherwise the ABS is disabled.

Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

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 STOP fuse, possible short to ground in its circuitry
^ Misadjusted stop lamp switch
^ Faulty stop lamp switch
^ Open or high resistance in the brake switch input circuit
^ Short to voltage in the brake switch input circuit
^ An internal EBCM malfunction
If an intermittent malfunction exists, refer to Testing for Intermittent and Poor Connections in Symptoms. A Symptoms - Antilock Brake System

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
2. This step inspects the Stop Lamp Switch status with the switch OFF.
3. This step inspects the Stop Lamp Switch status with the switch applied.
4. This step ensures proper adjustment of the Stop Lamp Switch.