Power Locks: Description and Operation
INTRODUCTIONAll doors can be locked or unlocked electrically by operating the switch on either front door panels.
The rear doors can be locked or unlocked by actuation of the front door switch, or can be locked or unlocked mechanically and independently with their respective locking knobs.
The front doors can be locked or unlocked mechanically with the locking knob regardless of electrical locking and unlocking actuation with the front door knobs.
The right and left front door on all vehicles can be locked or unlocked mechanically from the outside with the key or electrically as described above. The left front can also be unlocked by actuation of the inside remote door handle. The right front door can be unlocked by actuation of the inside remote door handle.
SYSTEM OPERATION
Automatic Door Locks
The system includes an automatic door locking feature actuated by the Body Control Module (BCM). The vehicle is built with the system enabled.
When the system is disabled the door locks will work by use of the door lock switches only When this system is enabled the automatic door locks will work automatically.
The Body Control Module controls the power locks when the 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. Also, the BCM will automatically lock all doors when all of the conditions below are met:
- All doors are closed
- The vehicle speed exceeds 15 ± 1 M.P.H.
- The throttle position sensor tip-in is greater than 10 ± 2 °
The automatic door lock system can be enabled/disabled either by the customer or with the DRB scan tool. Refer to the scan tool (DRB) or the vehicle owners manual for enabling disabling procedures..
The Body Control Module 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 latches are also equipped with a thermal protection system which prevents the latches from burning out.
Central Locking System
The central locking system is part of the Vehicle Theft Security System. Using the key, turn the driver 5 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 Vehicle Theft Security System 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
With the key in the ignition switch in the ON or OFF position and the driver's door open the BCM will ignore the command to lock the power door locks. Once the key is removed, or the driver's door is closed, the body control module will allow the power door locks to lock.
Keyless Entry System
The system allows locking and unlocking of vehicle door(s) by remote control using a hand held radio transmitter.
Central Lock/Unlock System
The central lock/unlock system uses the Vehicle Theft Security System door switch to lock and unlock all doors using the key Turning the key to the lock position in the driver's or passenger's door will lock all doors. Turning the key in the driver's door to the unlock position once will unlock driver's door only. Turning the key a second time within five Seconds of the first time will unlock all doors. Turning the key in the passenger's door to the unlock position will unlock all doors.