C1295

C1295: Brake Light Switch Circuit Open

CIRCUIT DESCRIPTION
This DTC is used to identify open stop lamp switch circuitry that prevents stop lamp switch input to EBCM from changing states when the brake is applied. EBCM sends a low current 5 volt sense voltage on brake switch input line to the rear brake light bulbs. If rear brake light circuit is intact, this voltage will be pulled low (under 1 volt) to ground through the rear brake light bulbs. When the brake light switch is depressed, battery voltage will be supplied to the rear brake lights and to EBCM, indicating brake lights are on. If voltage is neither low (under 1 volt) or high (battery voltage), EBCM cannot determine brake switch state and DTC C1295 will be set.

CONDITIONS FOR SETTING THE DTC
DTC 1295 can be set after initialization. If voltage on brake switch input line voltage is between 2 to 5 volts for 2 seconds, the DTC will be set.

ACTION TAKEN WHEN THE DTC SETS
^ ABS remains functional

DIAGNOSTIC AIDS
The following are typical causes of DTC C1295.
^ One or more stop lamp bulb filaments open.
^ One or more stop lamp bulb and/or socket connections loose.
^ One or more stop lamp grounds loose or open.
^ Terminal E136-33 brake switch input terminal connection poor or open.
^ Terminal E136-33 brake switch input circuit open.

INSPECTION





NOTE: Diagnostic flow table must be performed first before using this table.
Type 1