Power Locks: Description and Operation

POWER LOCK SYSTEMS
All doors can be locked or unlocked electrically by operating the switch on either front door panels. When the door lock switch is activated the Body Control Module (BCM) actuates the door lock relay.

All doors can be locked or unlocked mechanically and independently with their respective locking knobs.

The right and left front door can be locked or unlocked mechanically from the outside with the key or all locks can be remotely locked or unlocked with the Remote Keyless Entry (RKE) transmitter. All doors can be locked/unlocked from the front doors via the Central Locking System. The front doors can also be unlocked by actuation of the inside remote door handle.

The deck lid can be unlatched by either depressing the push switch from inside the car, manually by key from outside or by depressing the remote keyless entry deck lid release button two times. This feature is customer programmable. The customer has a choice of one or two button presses for deck lid opening. The vehicle is shipped in the button pressed twice mode.

The Body Control Module (BCM) actuates the power door lock relays when a door lock switch is activated. If the door lock switch is pressed for longer than eight consecutive seconds, the BCM will de-energize the door lock relay.

The system includes an Automatic Door Locking feature. The vehicle is shipped with the system enabled. When the system is disabled the door locks will work by use of the door lock switches and the Remote Keyless Entry System only. When the Automatic Door Lock System is enabled the BCM will automatically lock all the doors when all of the conditions below are met:
- All doors are closed
- The vehicle speed exceeds 15 +/- 1 mph
- The throttle position sensor tip-in is greater than 10 +/- 2 degrees

The DRB III scan tool is used to enable/disable the automatic door lock system. Refer to the proper Body Diagnostic Procedures. They are also customer programmable. Refer to Owners Manual for customer programming procedures.

The BCM will automatically re-lock all doors if the above conditions are met and if any of the doors become ajar and then closes again.

The power lock motors are also equipped with a thermal protection system which prevents the motors from burning out. The motors may chatter if they are continuously activated.

CENTRAL LOCKING SYSTEM
The Central Locking System is part of the Vehicle Theft Security System (VTSS).

Using the key, turn the driver's or passenger door cylinder lock to the lock position, all doors will lock. This feature operates differently on each door. Turn key in the driver's door to the unlock position once will unlock driver's door only. Turning the key a second time to the unlock position within five seconds of the first time will unlock all doors. Turn key once in the passenger's door to the unlock position will unlock all doors.

The lock/unlock operation will arm/disarm the VTSS and will also activate/cancel the illuminated entry feature.

CHILD PROTECTION LOCK
The child protection locks are on the rear doors only.

The lock when engaged, will disable the inside door handle from opening the door. The lock is part of the latch/lock assembly The lock is engaged by moving a lever that is located on the rearward inside edge of the door.

DOOR LOCK INHIBIT
The Door Lock Inhibit prevents the vehicle from being locked with the key in the ignition.

With the key in the ignition switch and the driver's door open, the Body Control Module (BCM) will ignore the command to lock the power door locks.

Once the key is removed, or the driver's door is closed, the BCM will allow the power door locks to lock.

REMOTE KEYLESS ENTRY (RKE) SYSTEM
The Remote keyless Entry (RKE) system allows locking and unlocking of vehicle door(s) and deck lid by remote control using a hand held radio frequency (RF) transmitter.

The ignition switch must be OFF before the trunk lid can be unlatched with the transmitter.

The receiver may be programmed with up to four transmitters (vehicles are shipped with two). Each transmitter has its own code and the code has been stored in memory when it is programmed into the receiver. If the transmitter is replaced or other transmitters are added, each transmitter must be reprogrammed.