Chrysler Pacifica. Manual — part 518
from the mounting sphere. Do not try to remove the
retainer, it is not designed to be removed.
(3) Remove the link rod from the liftgate mounting
sphere by gently pulling off.
(4) Remove the D-pillar trim from the vehicle.
Refer to the Body section for the procedure.
(5) Remove the link rod from the drive unit
mounting sphere by gently pulling off.
INSTALLATION
(1) Install the drive unit end of the link rod on its
mounting sphere by gently pushing straight on.
(2) Push the plastic retainer down to lock the
mechanism in position.
(3) Install the D-pillar trim on the vehicle. Refer to
the Body section for the procedure.
(4) Install the liftgate end of the link rod on its
mounting sphere by gently pushing straight on.
(5) Push the plastic retainer down to lock the
mechanism in position.
(6) Close the liftgate and check for proper power
liftgate operation.
POWER LATCH
DESCRIPTION
Vehicles equipped with a power liftgate, utilize a
power cinch/release latch. This latch performs the
same function as a manual liftgate latch as well as
the power cinch/release capability. A second type of
power latch can also be found on some models, this
latch is designed to perform a power release only.
The power cinch and release capability is accom-
plished by an actuator mounted to the top of the
latch assembly. The latch is located in the lower cen-
ter of the liftgate assembly and contains integral
switches. These switches act as a liftgate ajar switch.
The power latch cannot be adjusted or repaired.
The power latch assembly can be replaced as a com-
plete assembly, latch without actuator or just the
actuator. Consult your Mopar parts catalog for spe-
cific part numbers.
OPERATION
Operating on hardwired inputs from the power lift-
gate control module, the latch mounted actuator
(cinch/release motor) provides the torque required to
close the liftgate from the secondary to the primary
closed
and
latched
position.
The
actuator
also
releases the liftgate from the primary closed and
latched position to the fully unlatched and movable
position.
NOTE: Power latch “Cinching” will become disabled
if the pinch sensors are inoperable or damaged.
REMOVAL
(1) Open the liftgate.
(2) Open the hood, disconnect and isolate the neg-
ative battery cable.
(3) Remove the liftgate trim panel. Refer to the
Body section for the procedure.
(4) Disconnect the power latch electrical connector.
(5) Remove the power latch retaining bolts (Fig. 8)
and remove the latch assembly from the liftgate.
INSTALLATION
(1) Install the power latch retaining bolts. Torque
to 11 N·m (95 in. lbs.).
(2) Connect the power latch electrical connector
and secure the wire harness push pin retainers.
(3) Connect the negative battery cable.
(4) Using an appropriate scan tool, check and
erase any power liftgate control module diagnostic
trouble codes related to the power latch.
(5) 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.
(6) Verify power liftgate manual operation. Pull
door open using exterior liftgate handle switch.
(7) Install the liftgate trim panel. Refer to the
Body section for the procedure.
Fig. 8 CS Power Latch Retaining Bolts
1 - Latch Assembly
2 - Latch Retaining Bolts
CS
POWER LIFTGATE SYSTEM
8N - 13
LINK ROD (Continued)
LATCH ACTUATOR
DESCRIPTION
The power cinch/release latch function is made pos-
sible by a latch actuator attached to the top of the
liftgate latch assembly. This latch actuator contains a
small drive gear that meshes with the latch assem-
blies internal gears to perform the power cinch/re-
lease function. The latch actuator is controlled by the
power liftgate control module, which controls the
cinch function and limits actuator current draw to
protect the assembly. Refer to the Latch in this sec-
tion for additional information.
The power cinch/release latch actuator cannot be
adjusted or repaired and if damaged the actuator
must be replaced. Consult your Mopar™ parts cata-
log for specific part numbers.
OPERATION
During a power close cycle, the latch actuator pro-
vides the torque required to close the power liftgate
from the secondary to the primary closed and latched
position. During a power open cycle, the latch actua-
tor releases the liftgate from the primary closed and
latched position to the fully unlatched and movable
position. The power liftgate control module controls
the latch actuator via hard-wired inputs. Refer to
Latch in this section for additional information.
REMOVAL
(1) Open the liftgate.
(2) Disconnect and isolate the negative battery
cable.
(3) Remove the liftgate trim panel. Refer to the
Body section for the procedure.
(4) Disconnect the power latch electrical connector.
(5) Remove the latch retaining bolts and remove
the latch assembly from the liftgate.
(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.
CAUTION: Locate the wires coming from the actua-
tor portion of the latch assembly. On a piece of
paper, note the wire color and cavity the wires are
currently installed in on both the actuator and con-
nector side of the harness. This will prove helpful
later.
(8) Back the three wires out of the main latch elec-
trical connector. Refer to the wiring section for
detailed instructions.
(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 on the latch assem-
bly.
(2) Install the latch actuator retaining screws.
Torque the screws to 4 in. lbs.
(3) Install the three wires in the main latch elec-
trical connector. Refer to the wiring section for
detailed instructions.
NOTE: Be certain the actuator wires are reinstalled
in the correct wire cavities. Failure to do so could
result in damage to components. Refer to Wiring
Diagrams if previous notes were not made.
(4) Secure the main connector wire harness retain-
ing push pins on the latch actuator housing.
(5) Position the latch and install the latch retain-
ing bolts. Torque to 11 N·m (95 in. lbs.).
(6) Connect the power latch electrical connector.
(7) Connect the negative battery cable.
(8) Using an appropriate scan tool, check and
erase any power liftgate control module diagnostic
trouble codes related to the power latch.
(9) 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.
(10) Verify power liftgate manual operation. Pull
door open using exterior liftgate handle switch.
(11) Install the liftgate trim panel. Refer to the
Body section for the procedure.
8N - 14
POWER LIFTGATE SYSTEM
CS
OPTICAL SENSOR
DESCRIPTION
Vehicles equipped with a power liftgate utilize a
optical sensor (Fig. 9). This sensor is located on the
drive unit clutch housing and is used to supply the
power liftgate control module with the motor/clutch
speed. This speed signal helps the control module
detect obstacles in the power liftgates path or liftgate
system component failure. Four wires connect the
optical sensor to the drive unit’s main electrical con-
nector.
The optical sensor cannot be adjusted or repaired
and if found to be faulty, must be replaced. Consult
your Mopar parts catalog for a specific part number.
OPERATION
The optical sensor provides a speed/time signal to
the power liftgate control module. The speed signal is
generated from a trigger wheel, located inside the
clutch housing of the drive unit assembly. When the
optical sensor is installed in the clutch housing prop-
erly, the trigger wheel is positioned in the optical
sensor. Hard-wired inputs to and from the liftgate
control module are used to monitor the speed/time of
the liftgate motor and clutch assembly.
REMOVAL
(1) Open the liftgate.
(2) Disconnect and isolate the negative battery
cable.
(3) Remove the left rear D-pillar trim panel from
the vehicle. Refer to the Body section for the proce-
dure.
CAUTION: Locate the wires coming from the optical
sensor. On a piece of paper, note the wire location
and cavity the wires are currently installed in on
both the sensor and connector side of the harness.
This will prove helpful later.
(4) Cut the wires leading to the optical sensor and
back the wires out of the drive unit’s main electrical
connector. Refer to the Wiring section for instruc-
tions.
(5) Using a small flat-bladed tool, depress one of
the optical sensor’s plastic retaining tabs (Fig. 10) to
unhook the optical sensor from the clutch housing
assembly.
INSTALLATION
NOTE: Be certain the optical sensor wires are rein-
stalled in the correct wire cavities. Failure to do so
could result in damage to components. Refer to
Wiring Diagrams if previous notes were not made.
(1) Perform a wiring repair on the optical sensor
wires, or install new terminals on the wire ends and
reinstall in the drive unit electrical connector. Be cer-
tain to follow the approved procedure in the Wiring
section.
(2) Install the optical sensor on the clutch housing
assembly.
(3) Connect the negative battery cable.
Fig. 9 CS Power Liftgate Optical Sensor
Fig. 10 Removing Optical Sensor
1 - Optical Sensor Retaining Tabs
2 - Optical Sensor
CS
POWER LIFTGATE SYSTEM
8N - 15
(4) Using an appropriate scan tool, check and
erase any power liftgate module diagnostic trouble
codes.
(5) Verify power liftgate system and optical sensor
operation. Cycle the power liftgate through one com-
plete open and close cycle, this will allow the power
liftgate module to relearn its cycle with the new com-
ponents.
(6) Install the left rear D-pillar trim panel on the
vehicle. Refer to the Body section for the procedure.
PINCH SENSOR
DESCRIPTION
Vehicles equipped with a power liftgate utilize two
pinch sensors. One pinch sensor is located on each
side of the liftgate. These sensors look like weather-
strips, however they consist of pieces of electrically
conductive rubber (tapeswitch), wires, resistor, dou-
ble sided tape, and a plastic carrier. Pinch sensors
are used to provide additional protection against
vehicle damage or personal injury caused by an
obstacle being “pinched” between the liftgate and the
liftgate opening of the vehicle.
The pinch sensors are wired in series with the
power liftgate control module. If one pinch sensor
becomes defective the module will act as though both
sensors are defective. The power latch “Cinching”
operation will be disabled if a problem is detected by
the control module.
OPERATION
During a power liftgate close cycle, if either of the
two pinch sensors detect a obstruction or “Pinched”
condition a hardwired signal is sent to the power lift-
gate control module. The power liftgate control mod-
ule will stop the direction of the liftgate immediately
and return it to the full open position. The conduc-
tive rubber strips incorporated into the sensors pro-
vide the mechanical means for this sensor function.
DIAGNOSIS AND TESTING - PINCH SENSOR
To verify power liftgate system and pinch sensor
operation.
(1) Cycle the power liftgate through two complete
open and close cycles, during each of the final close
cycles, with the liftgate in mid-travel, depress
each of the pinch sensors to verify the power liftgate
control module detects an obstruction and returns to
the open position. If OK, pinch sensors and module
are OK at this time. If NOT OK, go to Step 2
(2) Remove the liftgate trim panel to access the
inoperable pinch sensor’s electrical connector. Using
an ohmmeter, check for continuity on the two wires
leading from the pinch sensor. While depressing the
pinch sensor, continuity should be 300 ohms max.
While NOT depressing the pinch sensor, continuity
should be 10,000 ohms min. If OK, pinch sensor is
OK at this time. If NOT OK, replace the pinch sen-
sor.
REMOVAL
(1) Open the liftgate.
(2) Disconnect and isolate the negative battery
cable.
(3) Remove the trim panel from liftgate. Refer to
the Body section for the procedure.
(4) Disconnect the pinch sensor wire harness con-
nector.
(5) Remove the screws holding the pinch sensor to
liftgate.
(6) Feed the pinch sensor wire harness out of the
liftgate and remove the sensor from the vehicle.
INSTALLATION
(1) Position the pinch sensor and install screws
holding the sensor to the liftgate, third one down
first. Torque screws to 25 in. lbs.
(2) Install wire harness grommet in liftgate flange
and route, connect the pinch sensor wire harness
connector.
(3) Install the trim panel on the liftgate. Refer to
the Body section for the procedure.
(4) Connect the negative battery cable.
(5) Using an appropriate scan tool, check and
erase any power liftgate control module diagnostic
trouble codes related to the pinch sensor.
(6) 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.
WARNING: USE EXTREME CAUTION WHEN TEST-
ING
PINCH
SENSOR
OPERATION.
PERSONAL
INJURY MAY RESULT.
8N - 16
POWER LIFTGATE SYSTEM
CS
OPTICAL SENSOR (Continued)
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