Power Door Lock System

POWER DOOR LOCK SYSTEM
When the Body Control Module (BCM) receives an input for a lock/unlock request (door lock switch, Remote Keyless Entry (RKE), or door key cylinder switch (w/VTSS only), it will ground the appropriate relay for a specified amount of time. For this vehicle all door lock relays are located inside the body control module and are not serviced separately. The door lock switches provide a variable voltage (Multiplexed (MUX) circuit) to the BCM and the BCM will respond to that command. If the conditions for door lock inhibit exist (key in ignition and left front door open), the BCM will not respond to a lock command.

Other power door lock features:

Automatic Door Locks
This feature can be enabled/disabled by using either the DRB, MDS machine or customer key cycle method. When enabled, all the doors will lock when the vehicle reaches a speed greater than 15 MPH, all doors are closed and an increase of TPS signal is received by the PCM. If a door is opened and the vehicle slows to below 15 MPH, the door locks will operate again once all doors are closed and the vehicle speed accelerates above 15 MPH.

Remote Keyless Entry (RKE)
The body control module receives and decodes messages from the remote keyless entry transmitter. The remote keyless entry module is built into the BCM (premium) and is not serviced separately. When the lock button is pressed all doors will lock, horn will chirp, courtesy lamps will turn off and VTSS (if equipped) will arm. When the unlock button is pressed once, the left front door will unlock, courtesy lamps will light (if equipped w/illuminated entry) and VTSS (if equipped) will disarm. If the unlock button is pressed a second time (within 5 seconds of the first), all the other doors will unlock. Panic mode (if equipped with VTSS), is accomplished by pressing both lock and unlock buttons at the same time. 1997 JX transmitters have a separate panic button. This flashes the lights and sounds the horn but does not prevent the engine from running.

The BCM will ignore all commands from the transmitter if the vehicle speed is over 15 MPH. This allows the engine to be running during warm up on cold days and then using the RKE to unlock the doors.

The RKE software can store up to 4 transmitter codes.