Starting System: Description and Operation

Circuit Operation
Battery voltage is applied at all times from the positive battery terminal to the starter switch and the normally open starter solenoid contacts. When the starter switch is turned to START and the automatic transmission mode switch (A/T) or is closed, battery voltage is applied to the starter relay coil. The starter relay is grounded by the Powertrain Control Module (PCM) which energizes and the starter relay applies battery voltage to the starter solenoid coils. The starter solenoid coils energize, the starter solenoid contact closes, and battery voltage is applied to the starter motor. The starter motor engages to start the engine.