(2) Open the liftgate and remove the lower liftgate
trim panel. (Refer to 23 - BODY/DECKLID/HATCH/
LIFTGATE/TAILGATE/TRIM PANEL - REMOVAL).
(3) Disconnect the power latch electrical connector
(Fig. 12).
(4) Remove the three latch retaining bolts.
(5) Grab the latch assembly and unhook the key
cylinder link rod from the key cylinder (Fig. 12).
(6) Place the latch assembly on a bench and locate
the three wires leading from the actuator portion of
the latch assembly.
(7) Disengage the main connector retaining push
pins from the latch actuator housing.
(8) Back the three wires out of the main latch elec-
trical connector.
(9) Flip the latch assembly over and remove the
latch actuator retaining screw(s).
(10) Remove the latch actuator from the latch
assembly.
INSTALLATION
(1) Install the latch actuator onto the latch assem-
bly.
(2) Install the three latch actuator retaining
screws.
(3) Install the three wires in the main latch elec-
trical connector.NOTE: Be certain wires are reinstalled in the correct
wire cavities. Failure to do so could result in dam-
age to the latch actuator. Refer to the appropriate
wiring information for complete circuit schematic or
connector pin-out information.
(4) Secure the main connector retaining push pins
on the latch actuator housing.
(5) Grab the latch assembly and hook the key cyl-
inder link rod on the key cylinder (Fig. 13).
(6) Position the latch and install three new latch
retaining bolts. Torque to 10 N´m (90 in. lbs.).
(7) Connect the power latch electrical connector
(Fig. 13).
(8) Install the lower liftgate trim panel, (Refer to
23 - BODY/DECKLID/HATCH/LIFTGATE/TAIL-
GATE/TRIM PANEL - INSTALLATION).
(9) Connect the battery negative cable.
(10) Using an appropriate scan tool, check and
erase any power liftgate control module diagnostic
trouble codes related to the power latch.
(11) Verify power liftgate system and power cinch /
release latch operation. Cycle the power liftgate
through one complete open and close cycle, this will
allow the power liftgate control module to relearn its
cycle with the new components.
(12) Verify power liftgate manual operation. Using
liftgate key rotate the lock cylinder to verify door
operation. Pull door open using exterior liftgate han-
dle / switch.
Fig. 12 POWER LATCH ORIENTATION
1 - LATCH & ACTUATOR ASSEMBLY
2 - LATCH ELECTRICAL CONNECTOR
3 - LOCK CYLINDER LINK ROD
4 - LIFTGATE LOCK CYLINDER
Fig. 13 POWER LATCH ORIENTATION
1 - LATCH & ACTUATOR ASSEMBLY
2 - LATCH ELECTRICAL CONNECTOR
3 - LOCK CYLINDER LINK ROD
4 - LIFTGATE LOCK CYLINDER
8N - 14 POWER LIFTGATE SYSTEMRS
LATCH ACTUATOR (Continued)
LIFTGATE MOTOR
DESCRIPTION
The gear motor assembly (Fig. 14) consists of a DC
motor, hall effect sensor, engage actuator, full open
switch, lift gear, aluminum housing, drive gears and
wire harness. The gears and motor portion of the
assembly provides the power and torque required to
open or close the liftgate. The hall effect sensor is used
to provide the liftgate control module with a speed read-
ing, which is used to monitor the resistance of liftgate
travel. This speed reading also allows the power liftgate
control module to detect obstructions and move the lift-
gate accordingly. The engage actuator is used to toggle
between power open/close mode and full manual mode
when desired. The full open switch is used to let the
power liftgate control module know when the liftgate is
approaching the full open position.
Serviceable components of the power liftgate gear/mo-
tor assembly are the complete gear/motor assembly,
motor and wire harness, lift gear and control rod,
engage actuator, full open switch and the transverse
bracket.
OPERATION
With the push of a power liftgate command switch
(liftgate closed), the power liftgate control module
will signal the latch assembly to release the liftgate
from its primary closed and latched position to the
released and movable position. The liftgate motor-
mounted engage actuator then engages the liftgatemotor assembly, which moves the liftgate into the
open position. The liftgate motor provides the torque
and power to move the door to its full open or closed
position(Refer to 8 - ELECTRICAL/POWER DOORS -
OPERATION) for additional information.
REMOVAL
The power liftgate gear/motor assembly is serviced
in two ways: the complete gear/motor assembly, or
the motor, aluminum housing, drive gears and wire
harness assembly. To perform this service, use the
following procedure to remove the gear/motor assem-
bly from the vehicle. Then refer to the other proce-
dures called out in this section to transfer the
remaining components (engage actuator, full open
switch, transverse bracket and lift gear and rod) to
the replacement gear/motor assembly.
(1)
Disconnect and isolate the battery negative cable.
(2) Remove the left rear D-pillar trim panel from
the vehicle, (Refer to 23 - BODY/INTERIOR/LEFT
D-PILLAR TRIM PANEL - REMOVAL).
(3) Disconnect the wire harness connector from the
motor assembly (Fig. 15).
(4) Remove the two bolts from the motor housing
and the one bolt from the transverse mount bracket.
(5) Grab the liftgate motor assembly and lift
upward and out to unhook the motor assembly from
the D-pillar.
(6) Remove the liftgate motor assembly from the
vehicle.
Fig. 14 POWER LIFTGATE COMPONENTS
1 - POWER LIFTGATE GEAR MOTOR/ASSEMBLY
2 - POWER LIFTGATE CONTROL MODULE
3 - ELECTRICAL GROUND LOCATION
Fig. 15 POWER LIFTGATE COMPONENTS
1 - POWER LIFTGATE GEAR MOTOR/ASSEMBLY
2 - POWER LIFTGATE CONTROL MODULE
3 - ELECTRICAL GROUND LOCATION
RSPOWER LIFTGATE SYSTEM8N-15
INSTALLATION
(1) Using the motor housing tab, hook the liftgate
motor assembly on the D-pillar.
(2) Install the three motor assembly retaining
bolts. Torque the two rear most bolts first to 9.5 N´m
(85 in. lbs.). Torque the remaining bolt next to the
window actuator to 9.5 N´m (85 in. lbs.).
(3) Connect the liftgate motor assembly electrical
connector.
(4) Install the D-pillar trim panel on the vehicle,
(Refer to 23 - BODY/INTERIOR/LEFT D-PILLAR
TRIM PANEL - INSTALLATION).
(5) Connect the battery negative cable.
(6) Using an appropriate scan tool, check any
erase any power liftgate control module diagnostic
trouble codes related to the door motor assembly.
(7) Verify power liftgate system operation. Cycle
the power liftgate through one complete open and
close cycle, this will allow the power liftgate control
module to relearn its cycle with the new components.
LIFT GEAR & LINK ROD
DESCRIPTION
The lift gear and rod assembly are located in the
left rear of the vehicle and are visible without remov-ing the D-pillar trim (Fig. 16). The lift gear provides
the leverage to move the liftgate from the closed to
the open position. The lift gear attaches to a bearing
on the gear motor assembly with four bolts. On the
outboard side of the lift gear are riveted on teeth,
which mesh with the gear motor assembly drive
gears during a open or close operation. The rod
assembly is a steel shaft, equipped with two spheri-
cal rod ends which attaches the lift gear to the lift-
gate. The lift gear and rod assembly are serviceable
components.
OPERATION
One end of the rod assembly is attached to the lift-
gate, the other attached to the lift gear. When the lift
gear is driven by the gear motor assembly the lift-
gate is moved to the open or closed position.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the left rear D-pillar trim panel from
the vehicle, (Refer to 23 - BODY/INTERIOR/LEFT
D-PILLAR TRIM PANEL - REMOVAL).
(3) Remove the lift gear retaining bolts (Fig. 17).
(4) Remove the lift gear and rod from the vehicle.
Fig. 16 LIFTGATE GEAR/MOTOR ASSEMBLY
1 - TRANSVERSE BRACKET
2 - ENGAGE ACTUATOR
3 - LIFT GEAR AND ROD ASSEMBLY
4 - LIFTGATE MOTOR
Fig. 17 LIFTGATE GEAR MOTOR ASSEMBLY
1 - ENGAGE ACTUATOR RETAINING SCREWS
2 - LIFT GEAR RETAINING BOLTS
8N - 16 POWER LIFTGATE SYSTEMRS
LIFTGATE MOTOR (Continued)
INSTALLATION
(1) Position the lift gear and rod assembly and
install the retaining bolts (Fig. 18). Torque the bolts
to 8 N´m (71 in. lbs.).
(2) Install the D-pillar trim panel on the vehicle,
(Refer to 23 - BODY/INTERIOR/LEFT D-PILLAR
TRIM PANEL - INSTALLATION).
(3) Connect the battery negative cable.
(4) Using an appropriate scan tool, check any
erase any power liftgate control module diagnostic
trouble codes related to the door motor assembly.
(5) Verify power liftgate system operation. Cycle
the power liftgate through one complete open and
close cycle, this will allow the power liftgate control
module to relearn its cycle with the new components.
CAUTION: Torque link rod to liftgate attachment
bolt to 250 in. lbs. Care must be taken not to over-
torque link rod bolt.
PINCH SENSOR
DESCRIPTION
Pinch sensors are located on each side of the lift-
gate (Fig. 19). These sensors look like weather-strips,
however they consist of pieces of electrically conduc-
tive rubber (tapeswitch), wires, resistor, double sided
tape, and a plastic carrier. They are used to indicate
an obstruction during a power liftgate close cycle.
OPERATION
During a power liftgate close cycle, if either of the
two conductive rubber strips (tapeswitch) of the
pinch sensor come in contact with an obstacle, the
pinch sensor circuit is completed. This tells the
power liftgate control module that a obstruction is
felt. The control module will stop the liftgate imme-
diately and return it to the full open position.
Fig. 18 LIFTGATE GEAR MOTOR ASSEMBLY
1 - ENGAGE ACTUATOR RETAINING SCREWS
2 - LIFT GEAR RETAINING BOLTS
Fig. 19 PINCH SENSOR LOCATION
1 - LIFTGATE
2 - PINCH SENSOR ASSEMBLY
3 - LIFTGATE PROP ROD
4 - PINCH SENSOR WIRE HARNESS CONNECTOR
5 - PINCH SENSOR WIRE HARNESS
RSPOWER LIFTGATE SYSTEM8N-17
LIFT GEAR & LINK ROD (Continued)
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove trim panel from liftgate, (Refer to 23 -
BODY/DECKLID/HATCH/LIFTGATE/TAILGATE/
TRIM PANEL - REMOVAL).
(3) Disconnect the pinch sensor wire harness con-
nector (Fig. 20).
(4) Remove screws holding the pinch sensor to lift-
gate.
(5) Feed the pinch sensor wire harness out of the
liftgate and remove the sensor from the vehicle.
INSTALLATION
WARNING: USE EXTREME CAUTION WHEN TEST-
ING PINCH SENSOR OPERATION.
CAUTION: Ensure liftgate surface is clean and dry
prior to pinch sensor installation. Failure to do so
will inhibit the adhesive backings ability to adhere
to the liftgate and cause improper system operation
or premature component failure.
(1) Position the pinch sensor to the liftgate.
(2) Install the third screw from the top of the sen-
sor first.Do not torque screw at this time.(3) Install the remaining three screws holding the
sensor to the liftgate. Torque all screws to 25 in. lbs.
(4) Install wire harness grommet in liftgate flange
and route, connect the pinch sensor wire harness
connector (Fig. 21).
(5) Remove protective tap from the top of the
pinch sensor. Firmly apply pressure to the sensor
adhesive to secure it to the liftgate.
(6) Install the trim panel on the liftgate, (Refer to
23 - BODY/DECKLID/HATCH/LIFTGATE/TAIL-
GATE/TRIM PANEL - INSTALLATION).
(7) Connect the battery negative cable.
(8) Using an appropriate scan tool, check and
erase any power liftgate control module diagnostic
trouble codes related to the pinch sensor.
(9) Verify power liftgate system and pinch sensor
operation. Cycle the power liftgate through one com-
plete open and close cycle, during the final close cycle
press the pinch sensor to verify the power liftgate
detects an obstruction and returns to the full open
position.
Fig. 20 PINCH SENSOR LOCATION
1 - LIFTGATE
2 - PINCH SENSOR ASSEMBLY
3 - LIFTGATE PROP ROD
4 - PINCH SENSOR WIRE HARNESS CONNECTOR
5 - PINCH SENSOR WIRE HARNESS
Fig. 21 PINCH SENSOR LOCATION
1 - LIFTGATE
2 - PINCH SENSOR ASSEMBLY
3 - LIFTGATE PROP ROD
4 - PINCH SENSOR WIRE HARNESS CONNECTOR
5 - PINCH SENSOR WIRE HARNESS
8N - 18 POWER LIFTGATE SYSTEMRS
PINCH SENSOR (Continued)
TRANSVERSE BRACKET
DESCRIPTION
The transverse bracket (Fig. 22) is used to support
and secure the power liftgate gear/motor assembly to
the left rear body D-pillar. The transverse bracket is
a serviceable power liftgate component.
OPERATION
The power liftgate transverse bracket supports the
gear motor assembly by supplying an additional
attachment point. Located on the leading edge of the
gear motor assembly, one end of the transverse
bracket attaches to the motor assembly the other to
the leading edge of the vehicles D-pillar.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the left D-pillar trim from the vehicle,
(Refer to 23 - BODY/INTERIOR/LEFT D-PILLAR
TRIM PANEL - REMOVAL).
(3) Disconnect the gear motor assembly electrical
connector and disengage retaining pushpin.
(4) Loosen the gear motor assembly retaining bolts
to allow room for transverse bracket to be removed.
(5) Remove the transverse bracket retaining bolts
(Fig. 23).
(6)
Remove the transverse bracket from the vehicle.
INSTALLATION
(1) Position the transverse bracket in the vehicle.
Be certain the transverse bracket is properly posi-
tioned. The bracket should just touch the engage
actuator arm and be positioned between the actuator
arm and the motor housing.
(2) Torque the transverse bracket retaining bolts
to the gear motor assembly to 9.5 N´m (85 in. lbs.).
Do not tighten the transverse bracket retaining bolt,
located under the window actuator at this time.
(3) Torque the gear motor assembly retaining bolts
to 9.5 N´m (85 in. lbs.).
(4) Torque the final transverse bracket retaining
bolt to 9.5 N´m (85 in. lbs.).
(5) Connect the gear motor assembly electrical con-
nector and engage retaining pushpin.
(6) Install the left D-pillar trim, (Refer to 23 -
BODY/INTERIOR/LEFT D-PILLAR TRIM PANEL -
INSTALLATION).
(7) Connect the battery negative cable.
(8) Using an appropriate scan tool, check any
erase any power liftgate control module diagnostic
trouble codes related to the door motor assembly.
(9) Verify power liftgate system operation. Cycle
the power liftgate through one complete open and
close cycle, this will allow the power liftgate control
module to relearn its cycle with the new components.
Fig. 22 LIFTGATE GEAR/MOTOR ASSEMBLY
1 - TRANSVERSE BRACKET
2 - ENGAGE ACTUATOR
3 - LIFT GEAR AND ROD ASSEMBLY
4 - LIFTGATE MOTOR
Fig. 23 LIFTGATE GEAR MOTOR ASSEMBLY
1 - TRANSVERSE BRACKET
2 - ENGAGE ACTUATOR
3 - LIFT GEAR AND ROD ASSEMBLY
4 - LIFTGATE MOTOR
RSPOWER LIFTGATE SYSTEM8N-19
POWER LOCKS
TABLE OF CONTENTS
page page
POWER LOCKS
DESCRIPTION.........................20
OPERATION...........................21
DOOR CYLINDER LOCK SWITCH - EXPORT
DESCRIPTION.........................22
OPERATION...........................22
DIAGNOSIS AND TESTING
DOOR CYLINDER LOCK SWITCH -
EXPORT............................22
REMOVAL.............................22
INSTALLATION.........................22
DOOR LOCK MOTOR
DIAGNOSIS AND TESTING
DOOR LOCK MOTOR..................23
DOOR LOCK SWITCH
DIAGNOSIS AND TESTING
DOOR LOCK SWITCH..................23
REMOVAL.............................23INSTALLATION.........................23
KEYLESS ENTRY TRANSMITTER
DIAGNOSIS AND TESTING
KEYLESS ENTRY TRANSMITTER.........24
STANDARD PROCEDURE
STANDARD PROCEDURE - HORN CHIRP
PREFERENCE........................24
STANDARD PROCEDURE - BATTERY
REPLACEMENT.......................24
STANDARD PROCEDURE - REMOTE
KEYLESS ENTRY TRANSMITTER
PROGRAMMING......................24
SPECIFICATIONS
SPECIFICATIONS - TRANSMITTER RANGE . 24
SPECIFICATIONS - BATTERY............24
SLIDING DOOR LOCK MOTOR
REMOVAL.............................25
INSTALLATION.........................25
POWER LOCKS
DESCRIPTION
POWER LOCKS
The power lock system allows all of the doors to be
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 Body Control Module (BCM) locks 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 actu-
ation 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 BCM will perform
another auto lock, if the doors did not electrically
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 BCM to actuate the
power lock system.
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
8N - 20 POWER LOCKSRS
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-
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. If an RKE transmitter is
inoperative or lost, new transmitter vehicle access
codes can be programmed into the system using a
DRB IIItscan 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:
²Automatic Door Lock- Customer programma-
ble feature that allows the BCM to perform an auto-
matic door lock if the vehicle speed is above 25.7
km/h (15 miles-per-hour).
²Automatic Door Unlock On Exit- Customer
programmable feature that allows the BCM to per-
form an automatic door unlock if the vehicle speed is
0, vehicle in park and driver door is opened.
²Flash 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.
²Programming Additional Transmitters-
Allows up to a total of four transmitter vehicle access
codes to be stored.
²Remote 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.
²Sound Horn on Lock- Allows the option of
having the horn sound a short chirp as an audible
verification that the RKE system received a validLock request from the RKE transmitter, or having no
audible verification.
OPERATION
POWER LOCKS
The Body Control Module (BCM) locks or unlocks
the doors when an actuation input signal from a door
lock switch, Central Lock key cylinder or Remote
Keyless Entry (RKE) is received. The BCM turns 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:
²Integrated Power Module (IPM)- to activate
the park lamps, the headlamps and the horn for the
horn chirp.
²Power 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.
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.
RSPOWER LOCKS8N-21
POWER LOCKS (Continued)