Principles Of Operation - Without Intelligent Access (IA)

Handles, Locks, Latches and Entry Systems

Principles of Operation - Without Intelligent Access (IA)

Power Door Locks

The Body Control Module (BCM) monitors the door lock control switch and the driver door lock cylinder. When the BCM receives an unlock/lock command from either the door lock control switch or the driver door lock cylinder, the BCM energizes a relay (internal to the SJB) to supply the correct power and grounds for the door lock actuators. The power door locks function independently of ignition status or vehicle speed.

Door Lock Indicator

For a visual indication of the door lock status, the BCM controls the door lock indicator on the door lock control switch. If all four doors are locked, the indicator is illuminated. If any one door is unlocked, the indicator turns off. The BCM monitors the door lock status through the unlock switches inside each of the 4 door latches. The BCM uses the input from the unlock switches to determine if the indicator should be illuminated or off.

Luggage Compartment Lid/Liftgate Release

The luggage compartment lid/liftgate release system is inhibited when the vehicle speed exceeds 8 km/h (5 mph) and when the vehicle doors are locked. The luggage compartment lid/liftgate latch releases the luggage compartment lid/liftgate when the release switch on the luggage compartment lid/liftgate or on the Remote Keyless Entry (RKE) transmitter is pressed. When the BCM receives a signal to release the luggage compartment lid/liftgate, the BCM supplies voltage to the latch. The luggage compartment lid/liftgate latch then actuates to release the luggage compartment lid/liftgate.

Remote Keyless Entry (RKE)

The BCM interprets radio frequency signals from the RKE transmitters. The BCM requests the illuminated entry feature to turn the interior lamps on when an unlock command is received. If a lock command is received, the illuminated entry feature turns off.

The RKE transmitter supplies a signal to the antenna internal to the BCM when any button is pressed. The BCM then supplies voltage to the appropriate door lock actuator(s) to lock or unlock the doors or release the luggage compartment lid/liftgate.