Smart Unlock

The smart unlock feature prevents the doors from electronically locking with the key in the ignition lock cylinder. When the BCM receives a lock command from the door lock control switch, and the key is in the ignition lock cylinder with one of the front doors open, the BCM commands the doors to unlock.

To override the smart unlock feature and intentionally lock the doors with the key in the ignition lock cylinder, close all doors and lock the vehicle by pressing the lock button on another RKE transmitter or with another key using the driver door lock cylinder.

Component Description

Door Lock Control Switch 

The door lock control switches are single pole, double throw switches. They are supplied voltage signals from the BCM for the lock and unlock requests.

When a switch is pressed to lock or unlock, the corresponding input circuit is routed to ground, indicating a request to lock or unlock the doors.

Door Latches 

The door latches are sealed units and contain the door lock actuator, lock/unlock feedback switch, and the door ajar switch. The door latches can be lubricated, if needed. Refer to: Door Latch Lubrication 

Liftgate Release Switch 

The liftgate release switch is a momentary contact switch that receives a voltage signal from the BCM. When the button is pressed, the input is routed to ground, signaling the BCM to release the liftgate latch. The release switch only operates when the doors are unlocked electronically or within 45 seconds of an initial press of the liftgate release button on a RKE transmitter.

Liftgate Latch 

The liftgate latch is a sealed unit and contains the release motor and the ajar switch.

Integrated Keyhead Transmitter (IKT) 

The Integrated Keyhead Transmitter (IKT) incorporates both the PATS and the RKE transmitter functions in a single device.

During key programming procedures, the PATS and RKE transmitter of an Integrated Keyhead Transmitter (IKT) are both programmed into the BCM.

DDM or PDM 

The DDM and PDM control the operation of the power door locks, power windows, and the power mirrors in the front doors. They communicate with each other and the BCM over the MS-CAN. They also send commands and receive feedback from the Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) over a LIN for each module.

The DDM and PDM do not require PMI when replaced.

Driver Rear Door Module (DRDM) or Passenger Rear Door Module (PRDM) 

The Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) control the operation of the power door locks and power windows in the sliding doors. They receive commands and send feedback with the corresponding DDM or PDM over a LIN for each module.

The Driver Rear Door Module (DRDM) and Passenger Rear Door Module (PRDM) do not require PMI when replaced.

BCM 

The BCM controls the operation of the power door locks and the RKE system. The BCM receives direct input from the liftgate release switch and the door lock control switches. It has an internal antenna for receiving the signals from the RKE transmitters. Depending upon the input received and if conditions allow, the BCM either locks/unlocks the doors or releases the liftgate latch.

The BCM requires PMI when replaced.