Relay Controlled Power Mode

The BCM and keyless entry control module use discrete push button switch inputs, transmitter in range status, current power mode state, transmission shift lever position and brake pedal position state to distinguish the correct power mode (Vehicle OFF, Accessory Mode, Vehicle in Run/Start Mode). The BCM and keyless entry control module, after determining the desired power mode, will activate the appropriate relays for that power mode.

The retained accessory power relay remains on for a timed period after the Ignition is switched to Vehicle OFF. Refer to Retained Accessory Power Description and Operation  for more information on the retained accessory power function.