C1295

Circuit Description
This DTC is used in order to identify open stoplamp switch circuitry that prevents the stoplamp switch input from changing states when the brake is applied. This DTC is used in conjunction with DTC C1291 in order to determine the cause of an open stoplamp switch malfunction.

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
The stoplamp switch input voltage is between 2.14 volts and 5.04 volts for 2 seconds.

Action Taken When the DTC Sets
^ The EBCM disables the TCS for the duration of the ignition cycle.
^ The TRACTION CONTROL indicator turns ON.
^ The ABS remains functional.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
^ The condition for the DTC is no longer present (the DTC is not current) and you used the On-Board Diagnostics Clear DTC function.
^ 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 stoplamp switch is open.
^ The stoplamp switch is misadjusted.
^ Verify proper stoplamp switch operation using the data list of the scan tool. As the brake is applied, the data list displays the stoplamp switch on within 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 PCM 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 stoplamp switch signal circuit from the stoplamp side of the splice pack to the EBCM.
4. The EBCM sources 5 volts on the stoplamp switch signal circuit. This small voltage has a ground path through the stoplamp bulbs. This DTC sets if the path to ground is open.