The BCM 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 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.
CENTRAL LOCKING SYSTEM
DESCRIPTION
The Central Locking System is part of the Vehicle
Theft Security System (VTSS).
OPERATION
Using the key, turn the driver’s 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 sec-
ond 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
VTSS and will also activate/cancel the illuminated
entry feature.
CHILD PROTECTION LOCK
DESCRIPTION
The child protection locks are on the rear doors
only.
OPERATION
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
DESCRIPTION
The Door Lock Inhibit prevents the vehicle from
being locked with the key in the ignition.
OPERATION
With the key in the ignition switch and the driver’s
door open, the Body Control Module (BCM) will
ignore the command to lock the power door locks.
Once the key is removed, or the driver’s door is
closed, the BCM will allow the power door locks to
lock.
REMOTE KEYLESS ENTRY (RKE) SYSTEM
DESCRIPTION
The Remote keyless Entry (RKE) system allows
locking and unlocking of vehicle door(s) and deck lid
by remote control using a hand held radio frequency
(RF) transmitter.
OPERATION
The ignition switch must be OFF before the trunk
lid can be unlatched with the transmitter.
The receiver may be programmed with up to four
transmitters (vehicles are shipped with two). Each
transmitter has its own code and the code has been
stored in memory when it is programmed into the
receiver. If the transmitter is replaced or other trans-
mitters are added, each transmitter must be repro-
grammed.
DIAGNOSIS AND TESTING
AUTOMATIC DOOR LOCK SYSTEM
For complete testing of the automatic door lock
systems, refer to the proper Body Diagnostic Proce-
dures Manual.
DECK LID RELEASE
For vehicles equipped with electric trunk lid
release.
(1) Confirm motor lead wire is connected and 10
volts or more are available at solenoid.
(2) Provide proper ground through latch mounting
screws.
(3) Remove latch and examine plunger. Plunger
should spring back when pressed.
(4) Insure that solenoid plunger travel is adequate
approximately 16 mm (5/8 inch).
DOOR LOCK MOTOR
Make certain battery is in normal condition before
circuits are tested.
To determine which motor is faulty, check each indi-
vidual door for electrical lock and unlock or disconnect
the motor connectors one at a time, while operating
the door lock switch. In the event that none of the
motors work, the problem maybe caused by a shorted
motor, a bad switch or a bad relay. Disconnecting a
defective motor will allow the others to work.
To test an individual door lock motor, disconnect
the electrical connector from the motor. To lock the
door, connect a 12 volt power source to the positive
pin of the lock motor and a ground wire to the other
pin (Fig. 1). To unlock the door reverse the wire con-
nections at the motor pin terminals. If these results
are NOT obtained, replace the motor.
8P - 2 POWER LOCK SYSTEMS LH
DESCRIPTION AND OPERATION (Continued)
To Next Page
Loading...
