C1295

DTC C1295: Brake Lamp Switch Circuit Open:

DTC C1295 Schematic:

Circuit Description
This DTC is used to identify an open stoplamp switch circuitry that prevents the stoplamp switch input to the Electronic Brake Control Module (EBCM) from changing states when the brake is applied.

This DTC is used in conjunction with DTCs C1291 and C1292 to determine the cause of an open stoplamp switch malfunction.

Conditions for Setting the DTC
This DTC will set when the following conditions are met:
^ The test checks for an open circuit in the stoplamp switch circuitry that prevents the stoplamp switch input to the EBCM from changing status when the brake pedal is applied.
^ This DTC can be set anytime.

Action Taken When the DTC Sets
A malfunction DTC is stored, ABS is disabled, and the amber ABS indicator lamp is turned ON.

Conditions for Clearing the DTC
^ Conditions for the malfunction are no longer present and the Tech 2 scan tool Clear DTC Information function is used.
^ One hundred drive cycles have passed with no malfunctions detected.

Diagnostic Aids
The following list contains items that need to be inspected when diagnosing this system:
^ Faulty (open) stoplamp switch electrical circuit.
^ All brake lamp bulbs are open.
^ Faulty stoplamp bulb electrical circuit (open/high resistance to ground).
An intermittent malfunction is most likely caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

The frequency of the malfunction can be checked by using the Enhanced Diagnostic function of the Tech 2 scan tool, as described in Enhanced Diagnostics.

Inspect the following harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wiring connections or physical damage to the wiring harness before component replacement:
^ EBCM connector C1.
^ Stoplamp switch connector.



Test Description
Numbers below refer to numbers on the diagnostic table.
2. Checks the EBCM's status of the stoplamp switch with a scan tool.
3. Checks the EBCM's status of the stoplamp switch with a scan tool.
5. Checks for an open in 20A/B/C/D/G.