Starting System - System Operation And Component Description (G1088391): General

Engine crank requests are monitored by the passive anti-theft system and, if valid, passed on to the ECM (engine control module). Refer to: Anti-Theft - Passive (Description and Operation).

When the ECM receives a crank request, it energizes the starter relay in the EJB (engine junction box). The energized starter relay supplies 12 V power (fed via the 250 A megafuse in the BJB (battery junction box)) to energize the pull-in coil of the starter solenoid. Once activated, the pull-in coil engages the solenoid plunger, which engages the pinion with the ring gear. The plunger then closes the solenoid circuit, feeding power from the 400 A megafuse in the BJB to the starter motor.