Power Locks: Description and Operation

The door lock switches provide a variable amount of voltage through the multiplexed (MUX) circuit to the BCM Depending upon that input and various conditions that must be met (i.e., door lock inhibit, etc.). the BCM will determine the action to be taken and activate the proper relay for approximately 250 to 350 msec.

Other power door lock features:

RKE (Remote Keyless Entry) - This feature allows locking and unlocking of the vehicle door(s) by remote control using a hand-held transmitter to activate a radio receiver (RKE module). If the vehicle is equipped with vehicle theft security system, it will also arm or disarm that system. The transmitter can also unlock the trunk while the vehicle is in park and the ignition off. The system was changed in model year 1995 requiring the trunk release button to be pressed twice to prevent accidental opening of the trunk. The module is capable of retaining two (2) transmitter codes. To program the transmitter see Body and Frame/Locks/Keyless Entry.

Door Lock Inhibit - When the key is in the ignition and the left front door is open, all door lock switches are disabled. The unlock switches are still functional. This protects against locking the vehicle with the keys still in the ignition.

Illuminated Entry-The Illuminated Entry System is available on vehicles equipped with the Remote Keyless Entry system. The Illuminated Entry System turns ON the courtesy lamps (except ignition switch lamp) when the remote keyless entry system is activated. The Remote Keyless Entry Module and the Body Control Module (BCM) are used to control the system. Courtesy lamps will turn on for 30 seconds (±1 second) and turn OFF. The courtesy lamps will stay ON for 6 seconds after the engine has started, then the Body Controller will turn the courtesy lamps OFF. After the engine has started, the courtesy lamps will go OFF as soon as:

^ The parking lamps are turned ON.
^ The vehicle is in motion.
^ The transaxle is shifted out of PARK on vehicles with Ultradrive Transaxle.

The Illuminated Entry System cannot be activated until 30 seconds after the system has timed out or the ignition switch has been turned OFF.