C1295

CIRCUIT DESCRIPTION
Diagnostic Trouble Code (DTC) C1295 identifies open brake switch circuitry that prevents the brake switch input to the Electronic Brake Control Module (EBCM) from changing states while applying the brake.
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
^ DTC C1295 can set after initialization is complete.
^ A malfunction exists if the brake switch input voltage is out of specification for one second. An open circuit exists when the brake switch input voltage is out of specification.

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC stores.
^ ABS disables.
^ The ABS warning indicator turns ON.

CONDITIONS FOR CLEARING THE DTC
^ The condition responsible for setting the Diagnostic Trouble Code (DTC) no longer exists and the Scan Tool Clear DTCs function is used.
^ 100 drive cycles pass with no DTCs detected. A drive cycle consists of starting the vehicle, driving the vehicle over 16 km/h (10 mph), stopping and then turning the ignition OFF.

DIAGNOSTIC AIDS
The following conditions may cause a malfunction:
^ A poor connection
^ Rubbed-through wire insulation
^ A broken wire inside the insulation
^ Faulty (open) stoplamp switch electrical circuit
^ All brake lamp bulbs are open
^ Faulty stoplamp bulb electrical circuit (open/high resistance to ground)

Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction.
Thoroughly inspect any circuitry that may cause the intermittent complaint for the following conditions:
^ Backed out terminals
^ Improper mating
^ Broken locks
^ Improperly formed or damaged terminals
^ Poor terminal-to-wiring connections
^ Physical damage to the wiring harness

TEST DESCRIPTION
3. This test determines if the Electronic Brake Control Module (EBCM) is receiving a brake switch input signal.
4. This test checks for an open in the brake switch input circuit.





DTC C1295 BRAKE LAMP SWITCH CIRCUIT OPEN