C1295

DTC C1295

Circuit Description
The EBCM sources 5 volts on the stop lamp switch signal circuit when the stop lamp switch is inactive. The voltage is supplied a ground path through the stop lamp bulbs.

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
The stoplamp switch input voltage is between 1.87 and 5.28 volts for 2 seconds.

Action Taken When the DTC Sets
^ The ABS remains functional.
^ The ABS indicator remains OFF.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
Possible causes of this DTC are the following conditions:
^ A signal circuit of the stop lamp switch is open.
^ The stop lamp switch is misadjusted.
^ Verify proper stop lamp switch operation using the data list of the scan tool. As the brake is applied, the data list displays the stop lamp switch ON within 2.54 cm (1 inch) of travel.
^ All brake lamps are open.
^ All brake lamp grounds are open.
^ Circuit has a wiring problem, terminal corrosion, or poor connections.
^ Loose or corroded EBCM ground or ECU ground.
^ An internal EBCM problem.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This DTC detects an open stop lamp switch signal circuit from the stop lamp side of the splice pack to the EBCM.
4. The EBCM sources 5 volts on the stop lamp switch signal circuit. This small voltage has a ground path through the stop lamp bulbs This DTC sets if the path to ground is open.

Steps 1-9:

DTC C1295