Power Locks: Description and Operation
POWER LOCKSPower Locks
A power operated door and liftgate lock system is available factory-installed equipment on this model. The power lock system allows all of the doors and the liftgate to be locked or unlocked electrically by operating a switch on either front door trim panel. The power lock system receives non-switched battery current through a fuse in the Fuse Block, so that the power locks remain operational, regardless of the ignition switch position.
This vehicle also offers several customer programmable features, which allows the selection of several optional electronic features to suit individual preferences.
The power lock system for this vehicle can also be operated remotely using the available Remote Keyless Entry (RKE) system radio frequency transmitters, if equipped.
Certain functions and features of the power lock system rely upon resources shared with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) data bus network. For proper diagnosis of these electronic modules or of the PCI data bus network, the use of a DRBIII(R) scan tool and the appropriate diagnostic information are required.
All doors can be locked or unlocked mechanically and independently with their respective locking knobs. The front doors can also be unlocked by actuation of the inside remote door handle.
Child Protection Locks
To provide a safer environment for children riding in the rear seat, the rear doors have the "child protection" door lock system.
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
Door Lock Inhibit
With the key in the ignition switch and the driver door open, the Remote Keyless Entry (RKE) module will ignore the command to lock the power door locks using the interior door lock switches. Once the key is removed, or the drivers door is closed, the RKE module will allow the power locks to lock using the door lock switch.
Central Locking/Unlocking (if Equipped)
The door locks can be locked or unlocked electrically via the exterior door key cylinders to provide the central locking/unlocking feature. The central locking/unlocking feature incorporates a customer programmable "Double activation unlock" feature which operates in the following manner: When enabled, the first turn of the key cylinder to the UNLOCK position (toward the front of the vehicle) will mechanically unlock the door whose key cylinder is being turned. A second turn of the key cylinder to the UNLOCK position (within five seconds of the first turn) will cause all vehicle doors and liftgate to unlock electrically. When this feature is disabled, all vehicle doors and liftgate will be unlocked electrically upon the first turn of a key cylinder to the UNLOCK position. The vehicle is locked electrically by turning the key cylinder to the LOCK position once, regardless of the state of the double activation unlock feature.
Rolling Door Locks
When the rolling door lock system is enabled, the RKE module will automatically lock all the vehicle doors and liftgate when all of the following conditions are met:
- All doors are closed
- The vehicle speed exceeds 25.7 Km/h (15 ± 1 mph).
- The throttle position sensor tip-in is greater than 10 ± 2 degrees.
The RKE module will automatically re-lock all doors if the above conditions are met and if any of the doors become ajar and then closed again.
The enabling/disabling of the rolling door lock feature is customer programmable, as well as programmable with the DRBIII(R) scan tool.
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.