Vehicles Without Auto Stop/Start System

If the Remote Function Actuator (RFA) detects a valid smart key the driver will be able to start the engine. When the ignition switch is operated the Body Control Module/Gateway Module (BCM/GWM) assembly transmits a hardwired crank request. The crank request is transmitted to the Powertrain Control Module (PCM) via FlexRay connection. For additional information, Refer to: ANTI-THEFT - ACTIVE

The energized starter relay supplies power from the primary battery 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, which connects primary battery power from the Engine Junction Box 2 (EJB 2). Then the starter motor turns the engine.

When the engine reaches operating speed, the PCM de-energizes the starter relay to disconnect power from the starter motor and disengage the pinion gear from the drive plate ring gear.