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CS
OPTICAL SENSOR (Continued)
Fig. 9 CS Power Liftgate Optical Sensor
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.
POWER LIFTGATE SYSTEM 8Ns - 15
Fig. 10 Removing Optical Sensor
1 - Optical Sensor Retaining Tabs
2 - Optical Sensor
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.
(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.
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