Power Locks: Description and Operation

HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS

The hood latch system consists of 1 latch controlled by the hood release handle under the lower steering column cover.

The door latch system consists of a primary latch, fastened to the inside of the door frame, that is controlled by the exterior and interior door handles. The door latch system has an integrated door ajar switch, door lock actuator, and a driver set/reset switch (driver door only). The door locks are actuated by either a remote keyless entry (RKE) transmitter, the interior door lock/unlock switch (located on the driver and passenger door trim panels), manually inserting the key into the driver door lock cylinder to lock/unlock, or using the RKE keypad.

The luggage compartment lid latch is equipped with an interior release handle and an actuator. The luggage compartment lid can be locked and unlocked using the lock cylinder (the valet key will not fit the lock cylinder), the luggage compartment interior trim remote switch (the remote switch opens the luggage compartment lid if it is not in the lock position), the RKE transmitter, and the RKE keypad.

The RKE transmitter communicates with the driver door module (DDM), which controls the output functions of the driver door lock actuator. The DDM communicates through the standard corporate protocol (SCP) link to the rear electronics module (REM) and the front electronic module (FEM) for the lock and unlock commands. The REM controls the output function of the luggage compartment lid actuator and the passenger door actuators. The REM is located in the RH rear side of the luggage compartment.

The RKE keypad remote entry feature allows the following functions to be carried out:
- unlock the driver door (when 2-stage unlocking is enabled)
- unlock all doors
- lock all doors
- arm the security system
- disarm the security system
- reset a panic alarm
- recall the memory seat/mirrors/steering column/pedals position associated with a particular remote entry device (when enabled)
- release the luggage compartment lid actuator

It also illuminates the RKE keypad lamp and issues illuminated entry on/off requests to the DDM, when locking and unlocking. The keyless entry keypad is wired to the DDM which controls the output functions of the driver door lock. The DDM then communicates with the REM which controls the output functions of the passenger door locks and the luggage compartment lid.

When any new lock cylinder is installed, the luggage compartment lid lock cylinder, the driver door lock cylinder and ignition lock cylinders should be installed as a set. This eliminates carrying an extra key which fit only 1 lock. If a new key is used, the new key code number is stamped on a metal tag attached to the key.

Individual lock cylinders are repaired by discarding the inoperative cylinder and building a new lock cylinder using the appropriate lock repair package. The lock repair package includes a detailed instruction sheet to build the new lock cylinder to the current key code of the vehicle.