Power Locks: Description and Operation
INTRODUCTIONAll doors can be locked or unlocked electrically by operating the switch on either front door panel. When the door lock switch is activated the Remote Keyless Entry Module provides power to the door lock motors through relays internal to the module.
The Remote Keyless Entry (RKE) Module also controls the Vehicle Theft Security System (VTSS).
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.
The RKE Module has three modes of operation including customer usage mode, dealer lot storage mode, and shipping mode. The customer usage mode provides full functionality of the module and is the mode in which the RKE module should be operating when used by the customer. Dealer lot storage mode and shipping modes are reduced power modes meant to extend vehicle battery life during shipping and storage in the dealer lot. Dealer lot storage mode provides limited VTSS and power door lock functions, but disables the Remote Keyless Entry (RKE) functions. This mode is intended to be used when the vehicle is on the dealer lot to provide VTSS coverage of the vehicle while minimizing battery drain. Shipping mode disables all normal functions (i.e. power door locks, RKE, and VTSS) of the module, and is intended to be used when the vehicle is shipped from the assembly plant.
NOTE: The dealer must remove the module from "Ship Mode" and place the RKE Module into either the "Dealer Lot" storage or "Customer Usage" modes of operation after receiving the vehicle from the assembly plant. Refer to Vehicle Theft/Security Systems, Switching Operating Modes/Configuring a New Module under Service Procedures.
CENTRAL LOCKING/UNLOCKING
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 to unlock electrically. When this feature is disabled, all vehicle doors 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.
POWER DOOR LOCKS
The Remote Keyless Entry (RKE) Module 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 RKE module will de-energize the door lock motors.
The system includes the rolling 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 Key- less Entry system only. When the rolling door lock system is enabled, the RKE module will automatically lock all the vehicle doors when all of the following conditions 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 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 DRB III(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.
CHILD PROTECTION LOCKS
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 and the driver door open, the Remote Keyless Entry (RKE) Module will ignore the command to lock the power door locks via the interior driver door lock switch. Once the key is removed, or the driver door is closed, the RKE module will allow the power door locks to lock via the interior door lock switches.