AT2–103 A340E (2JZ—GTE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING Stop Light Switch Circuit — CIRCUIT DESCRIPTION — 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 operated, this switch sends a signal to the ECM. Then the ECM cancels operation of the lock–up clutch while braking is in progress. — WIRING DIAGRAM — J/B No. 1 W-L 2 10 1B 11 15 A STOP Stop Light Switch W G-W 2 1 G-W 1 (1H) 10 (1C) J/B No.1 G-W 7 Light Failure Sensor Stop Light Power 120 A ALT Battery TRAC ECU ABS ECU Cruise Control ECU Shift Lock Control ECU G-W 11 G-W 4 STP J1 E10 ECM C05429