C1295

CIRCUIT DESCRIPTION
The Stoplamp Switch is a normally open switch. When the brake pedal is depressed the EBCM/EBTCM senses battery voltage. This allows the EBCM/EBTCM to determine the state of the brake lamps. A brake switch circuit open will result in a modified ABS entrance criteria and possibly false settings of excessive wheel speed variation codes (C1225 thru C1228).

CONDITIONS FOR SETTING THE DTC
^ The EBCM/EBTCM senses an open circuit condition for 2 seconds or more in the brake switch input circuit.
^ The EBCM/EBTCM senses an open circuit condition for 2 seconds or more in all brake lamps.
^ The EBCM/EBTCM senses an open circuit condition for 2 seconds or more in all brake lamp grounds.

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC is stored
^ TCS is disabled.
^ Traction Control indicator is turned on.
^ ABS and ETS remains functional.

CONDITIONS FOR CLEARING THE DTC
^ Condition for DTC is no longer present and scan tool clear DTC function is used.
^ 100 ignition cycles have passed with no DTCs detected.

DIAGNOSTIC AIDS
^ Possible causes:
- Stoplamp switch input circuit open.
- All brake lamps open.
- Open brake lamp ground.
- Circuit has a wiring problem, terminal corrosion, or poor connections.

^ 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.
^ If an intermittent malfunction exists refer to Intermittents and Poor Connections Diagnosis in Diagnostic Aids.