Vehicles Without Auto Stop/Start System

If the Remote Function Actuator (RFA) detects a valid smart key the driver is able to start the engine. When the ignition switch is operated the Body Control Module/Gateway Module (BCM/GWM) transmits a hardwired crank request. The crank request is transmitted to the Powertrain Control Module (PCM).

The energized starter relay supplies battery power to the starter solenoid, which energizes and causes the pinion gear to engage with the ring gear.

When the starter solenoid is energized it also closes high-current contacts. This connects startup battery power from the Battery Junction Box (BJB) to the starter motor to turn the engine

For additional information, Refer to: HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS (G2881085) .