The purpose of this circuit is to prevent the engine from stalling, while driving in lock-up condition, when brakes are suddenly applied.

When the brake pedal is depressed, this switch sends a signals to the ECM. Then the ECM cancels the operation of the lock-up clutch while braking is in progress.


DTC Detection Conditions

Trouble Areas


The stop light switch remains ON even when the vehicle repeats 5 cycles of STOP (less than 1.86 mph (3 km/h)) and GO (18.65 mph (30 km/h)or more) (2 trip detection logic)

• Short in stop light switch signal circuit

• Stop light switch


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