C1295

Part 1 Of 2:

Part 2 Of 2:

CIRCUIT DESCRIPTION
This Diagnostic Trouble Code (DTC) is used in order to identify open stoplamp/BTSI switch circuitry that prevents the stoplamp/BTSI 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/BTSI switch malfunction.

CONDITIONS FOR SETTING THE DTC
This DTC sets after the following occur:
^ Initialization is completed.
^ The stoplamp/BTSI switch input voltage is out of specification for 1 second (indicating an open circuit).

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC is stored.
^ The Traction Control System (TCS) is disabled.
^ The TRACTION CONTROL indicator is turned ON.
^ The ABS remains functional.

CONDITIONS FOR CLEARING THE DTC
^ The condition for DTC is no longer present and you used scan tool Clear DTCs function.
^ The condition for DTC is no longer present and you used the On-Board Clear DTCs function.
^ The Electronic Brake and Traction Control Module (EBTCM) does not detect the DTC in 50 drive cycles.

DIAGNOSTIC AIDS
^ It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
^ An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
^ If an intermittent malfunction exists, refer to Intermittents and Poor Connections Diagnosis in Diagrams..
^ This condition may be cause by the following:
- The stoplamp/BTSI switch circuit is open.
- All brake lamps are open.
- The brake lamp switch is open or misadjusted.
- The brake lamp ground is open.
- The circuit has a wiring problem, terminal corrosion, or poor connections.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
3. Checks for voltage at EBTCM.
9. Checks the stoplamp/BTSI switch.