locked or unlocked electrically by operating a switch
on either front door trim panel. The power lock sys-
tem receives non-switched battery current through a
fuse in the Integrated Power Module (IPM), so that
the power locks remain operational, regardless of the
ignition switch position.

The Driver and Passenger Door Modules (DDM

and PDM) lock the doors automatically when the
vehicle is driven beyond the speed of 25.7 Km/h (15
mph), all doors are closed, the accelerator pedal is
depressed and the door lock actuation had not been
previously activated. The rolling door lock feature is
customer programmable.

This vehicle also offers several customer program-

mable features, which allows the selection of several
optional electronic features to suit individual prefer-
ences.

The power lock system for this vehicle can also be

operated remotely using the available Remote Key-
less Entry (RKE) system radio frequency transmit-
ters, if equipped.

AUTOMATIC DOOR LOCKS

When enabled, this feature will lock all of the door

locks if all of the doors are closed and the vehicle
speed goes above 25.7 km/h (15 mph). If a door
unlock has occurred, then the DDM/PDM will per-

form another auto lock, if the doors did not electri-
cally unlock, another auto lock will not occur.

DOOR LOCK INHIBIT

When the key is in the ignition (in any switch posi-

tion) and either front door is opened, the door lock
switches

LOCK

functions

are

disabled.

The

UN-LOCK functions are still functional. This protects
against locking the vehicle with the key still in the
ignition. The RKE key fob will still lock the doors.
After the key is removed from the ignition or the
doors are closed, the power door locks will operate
normally.

REMOTE KEYLESS ENTRY

The Remote Keyless Entry (RKE) system allows

the use of a remote battery-powered radio transmit-
ter to communicate with the RKE receiver to actuate
the power lock system. The RKE receiver operates on
non-switched battery current through a fuse in the
Integrated Power Module (IPM), so that the system
remains operational, regardless of the ignition switch
position.

The RKE transmitters are also equipped with a

Panic button. If the Panic button on the RKE trans-
mitter is depressed, the horn will sound and the
exterior lights will flash on the vehicle for about
three minutes, or until the Panic button is depressed
a second time. Pressing the Panic button also acti-
vates the courtesy lamps. Pressing the Panic button
again stops the exterior lamps from flashing and the
horn from sounding. However, the courtesy lamps
will remain illuminated until either the BCM times
out lamp operation or until the turning of the igni-

POWER LOCKS

8N - 17

tion. The panic feature will operate if the ignition is
ON, but only if the Panic button is pressed prior to
starting the vehicle. A vehicle speed of about 25.7
km/h (15 miles-per-hour) will also cancel the panic
event.

The RKE system can also perform other functions

on this vehicle. If the vehicle is equipped with the
optional Vehicle Theft Security System (VTSS), the
RKE transmitter will arm the VTSS when the Lock
button is depressed, and disarm the VTSS when the
Unlock button is depressed.

The RKE system includes two transmitters when

the vehicle is shipped from the factory, but the sys-
tem can retain the vehicle access codes of up to a
total of eight transmitters. The transmitter codes are
retained in the RKE module memory, even if the bat-
tery is disconnected. If an RKE transmitter is faulty
or lost, new transmitter vehicle access codes can be
programmed into the system using a DRB III

t scan

tool.

This vehicle also offers several customer program-

mable features, which allows the selection of several
optional electronic features to suit individual prefer-
ences.

Customer

programmable

feature

options

affecting the RKE system include:

• Automatic Door Lock - Customer programma-

ble feature that allows the DDM/PDM to perform an
automatic door lock if the vehicle speed is above 25.7
km/h (15 miles-per-hour).

• Automatic Door Unlock On Exit - Customer

programmable feature that allows the DDM/PDM to
perform an automatic door unlock if the vehicle
speed is 0, vehicle in park and driver door is opened.

• Flash Lights with Lock and Unlock - Allows

the option of having the park lamps flash as an opti-
cal verification that the RKE system received a valid
Lock request or Unlock request from the RKE trans-
mitter, or having no optical verification.

• Programming Additional Transmitters -

Allows up to a total of four transmitter vehicle access
codes to be stored in the receiver memory.

• Remote Unlock Sequence - Allows the option

of having only the driver side front door unlock when
the RKE transmitter Unlock button is depressed the
first time. The remaining doors unlock when the but-
ton is depressed a second time within 5 seconds of
the first unlock press. Another option is having all
doors unlock upon the first depression of the RKE
transmitter Unlock button.

• RKE Linked to Memory - Allows the RKE

transmitter to be linked to the memory system. The
RKE transmitter can be linked to either position 1 or
position 2. This allows the operator to have the vehi-
cle move the mirrors, seat, pedals and radio stations
upon a depress of the unlock switch on the transmit-
ter.

• Sound Horn on Lock - Allows the option of

having the horn sound a short chirp as an audible
verification that the RKE system received a valid
Lock request from the RKE transmitter, or having no
audible verification.

OPERATION

POWER LOCKS

The Driver Door Module (DDM) and Passenger

Door Module (PDM) locks or unlocks the doors when
an actuation input signal from a door lock switch,
Central Lock key cylinder (if equipped), or Remote
Keyless Entry Module (RKE) is received. The DDM
and PDM turn on the output drivers and provides a
voltage level to the door lock motor for a specified
time.

REMOTE KEYLESS ENTRY

The RKE transmitter uses radio frequency signals

to communicate with the SKREEM module. The
SKREEM is on the PCI bus. When the operator
presses a button on the transmitter, it sends a spe-
cific request to the SKREEM. In turn, the SKREEM
sends the appropriate request over the PCI bus to
the following:

• Driver Door Module (DDM) - to control the

driver front door lock and unlock functions, the arm-
ing and disarming of the Vehicle Theft Alarm (VTA)
if equipped, and the activation of illuminated entry.

• Integrated Power Module (IPM) - to activate

the park lamps, the headlamps and the horn for the
horn chirp.

• Passenger Door Module (PDM) - to control

the passenger front, rear driver and rear passenger
door lock and unlock functions and activation of the
passenger door courtesy lamp.

• Power Liftgate Module (PLGM) - to control

the liftgate lock and unlock functions.

After pressing the lock button on the RKE trans-

mitter, all of the door locks will lock, the illuminated
entry will turn off (if all doors are closed) and the
vehicle theft security system (if equipped) will arm.

Pressing the unlock button one time will unlock

the driver door, or all doors based on the customer
programmable feature enabled, the illuminated entry
will turn on the courtesy lamps and the vehicle theft
security system (if equipped) will disarm. Pressing
the unlock button a second time, the remaining door
locks will unlock.

If the vehicle is equipped with the memory system,

the memory message will identify which transmitter
(1 or 2) sent the signal.

8N - 18

POWER LOCKS

POWER LOCKS (Continued)

ROLLING CODE

The rolling code feature changes part of the trans-

mitter message each time that it is used. The trans-
mitter message and the receiver message increment
together. Under certain conditions with a rolling code
system, such as pressing a button on the RKE trans-
mitter over 255 times outside of receiver range or
replacing the battery, the receiver and transmitter
can fall out of synchronization. To re-synchronize,
press and release the UNLOCK button on the RKE
transmitter repeatedly (it may take up to eight
cycles) while listening carefully for the power door
locks in the vehicle to cycle, indicating that resyn-
chronization has occurred.

The lock function works from the RKE transmitter

even in an out of synchronization condition, therefore
it could be verified by pressing the LOCK button on
the RKE key fob.

DIAGNOSIS AND TESTING - POWER LOCKS

Any diagnosis of the power lock system

should begin with the use of the DRB III

t diag-

nostic tool. For information on the use of the
DRB III

t, refer to the appropriate Diagnostic

Service Manual.

For complete circuit diagrams, refer to the appro-

priate wiring information.

DOOR LOCK MOTOR

DIAGNOSIS AND TESTING - DOOR LOCK
MOTOR

Any diagnosis of the power lock system

should begin with the use of the DRB III

t diag-

nostic tool. For information on the use of the
DRB III

t, refer to the appropriate Diagnostic

Service Manual.

For complete circuit diagrams, refer to the appro-

priate wiring information.

Verify battery condition before testing door lock

motor(s).

To determine which motor is faulty, check each

individual door for electrical lock and unlock or dis-
connect the motor connectors one at a time, while
operating the door lock switch. In the event that
none of the motors work, the problem may be caused
by a shorted motor or a faulty switch. Disconnecting
the faulty 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 fused 12 volt power source to the pos-
itive pin of the lock motor and a ground wire to the
other pin. To unlock the door reverse the wire con-
nections at the motor pin terminals. If these results
are not obtained, replace the door latch.

DRIVER CYLINDER LOCK
SWITCH

DESCRIPTION

The Door Cylinder Lock Switch (if equipped) is

used to:

• Unlock/Lock all the doors via the Central Lock-

ing feature.

• Arm/Disarm the Vehicle Theft Security System.

• Trigger the Illuminated Entry feature.
The door cylinder lock switch is mounted to the

rear of the driver door lock cylinder. When installed
on the rear of the cylinder, there is an anti-rotating
device on the lock cylinder that aligns with the
switch to prevent it from turning. The door cylinder
lock switch is a one time use switch. Once it is
removed from the rear of the door lock cylinder, it
may not be reinstalled and a new switch must be
used.

OPERATION

When the Door Cylinder Lock Switch (if equipped)

is turned either way using the door key cylinder, the
Driver Door Module (DDM) reads a direct message
signal from the switch.

Turning the key cylinder once, toward the front of

the vehicle, will:

(1) Mechanically unlock the door lock.
(2) Disarm the Vehicle Theft Security System (if

equipped).

(3) Turn on the Illuminated Entry (if equipped) for

approximately 30 seconds.

If the key cylinder is turned to the unlock position

(toward the front of vehicle) twice within two sec-
onds, all the doors and liftgate will unlock (if
equipped with the central locking feature).

To lock the vehicle using the door cylinder lock

switch, turn the key cylinder toward the rear of the
vehicle once. This will lock the door that you are
using the key on. If equipped with the central locking
feature, this will lock all the other doors and liftgate,
arm the vehicle theft security system and turn off
the illuminated entry.

DIAGNOSIS AND TESTING - DRIVER
CYLINDER LOCK SWITCH

(1) Visually inspect the switch for proper installa-

tion. Make sure it is seated on the rear of the key
cylinder, with the tab of the door key cylinder prop-
erly aligned with the slot on the door cylinder lock
switch.

(2) Disconnect the switch at the harness connector

and check the resistance in each switch position.

POWER LOCKS

8N - 19

POWER LOCKS (Continued)

CAUTION: Do not disconnect the switch from the
rear of the door key cylinder. This switch is a one
time use switch. Once it is removed from the rear of
the switch, it is not reusable and must be replaced.
Test the switch at the harness connector.

DRIVER CYLINDER LOCK SWITCH

RESISTANCE

SWITCH POSITION

RESISTANCE VALUE

COUNTERCLOCKWISE

(UNLOCK)

750 OHMS

CLOCKWISE (LOCK)

1.8K OHMS

REMOVAL

(1) Disconnect and isolate the battery negative

cable.

(2) Remove the door trim panel (Refer to 23 -

BODY/DOOR - FRONT/TRIM PANEL - REMOVAL).

(3) Peel back the water deflector to expose switch.
(4) Close the door window.
(5) Disconnect the door cylinder lock switch wire

connector from the door harness, and wiring clip
from the security shield.

(6) Remove the switch from the key cylinder in the

door handle and remove from vehicle.

INSTALLATION

(1) Install the switch on the key cylinder in the

door handle. Ensure that switch is in 12 O’clock posi-
tion.

(2) Route wire down through link rods.
(3) Install three clips to security shield.
(4) Connect wire harness connector.
(5) Install the door trim panel (Refer to 23 -

BODY/DOOR - FRONT/TRIM PANEL - INSTALLA-
TION).

(6) Connect the battery negative cable.
(7) Verify system operation.

REMOTE KEYLESS ENTRY
TRANSMITTER

DIAGNOSIS AND TESTING - REMOTE KEYLESS
ENTRY TRANSMITTER

Using special tool 9001, first test to ensure that

the transmitter is functioning. Typical testing dis-
tance is 2.5 centimeters (1 inch) for Asian transmit-
ters and 30.5 centimeters (12 inches) for all others.
To test, position the transmitter as shown (Fig. 1).
Press any transmitter button, then test each button
individually. The tool will beep if a radio signal
strength that lights five or more LED’s is detected.
Repeat this test three times. If transmitter fails any

of the test, refer to the Diagnostic Procedures man-
ual.

STANDARD PROCEDURE

STANDARD PROCEDURE - HORN CHIRP
PREFERENCE

DISABLING

The horn chirp can be toggled using a DRB III

t or

by using a programmed Remote Keyless Entry (RKE)
transmitter.

To DISABLE (cancelling) the horn chirp feature,

press and hold the transmitter LOCK button for a
minimum of five seconds. While pressing the LOCK
button in, press the UNLOCK button. The horn chirp
feature will not function until the above procedure is
repeated.

ENABLING

The horn chirp can be toggled using a DRB III

t or

by using the Remote Keyless Entry (RKE) transmit-
ter.

To ENABLE (reinstate) the horn chirp feature, use

any one of the four programmed key fob transmitters
and reverse the above procedures. It will ENABLE
the horn chirp feature for all transmitters.

STANDARD PROCEDURE - BATTERY
REPLACEMENT

(1) With the transmitter buttons facing down, use

a coin to pry the two halves of the transmitter apart.
Make sure not to damage the rubber gasket during
separation of the housing halves.

(2) Remove the battery from the transmitter back

housing holder.

(3) Replace the batteries. Avoid touching the new

batteries with your fingers, Skin oils may cause bat-

Fig. 1 TRANSMITTER DIAGNOSIS - TYPICAL

8N - 20

POWER LOCKS

DRIVER CYLINDER LOCK SWITCH (Continued)

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