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8Ns - 14
POWER LIFTGATE SYSTEM
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.
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.
CS
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