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INCOMPLETE POWER CLOSE - OPTICAL SIGNAL MISSING —
TEST
2
Examine the liftgate for proper alignment, worn or binding hinges, weak liftgate prop
assembly, loose/ hard weatherstrip, and track assembly for wear or anything that
would cause an obstruction to proper operation.
If necessary manually operate the power liftgate on a known good vehicle and notice
the effort needed to open and close for comparison.
Especially notice the effort needed to unlatch and close the liftgate.
Does it take more effort to operate the liftgate than it should?
Yes → Refer to Service information for the related symptom(s).
→ Go To 3
No
3
Open the liftgate manually to the middle position.
With the DRBIII , actuate the CLUTCH ENGAGEMENT.
Try to move the liftgate by hand to the full open and close positions.
NOTE: When the clutch is engaged by the DRBIII , you should not be able to
move the liftgate.
Were you able to move the liftgate at all?
Yes → Replace the Power Liftgate Drive Unit.
→ Go To 4
No
4
Disconnect the Power Liftgate Module C1 connector.
Disconnect the Power Liftgate Drive Unit connector.
Measure the resistance between the Liftgate Close Driver circuit and the Liftgate
Open Driver circuit.
Is the resistance below 10000.0 ohms?
Yes → Repair the Liftgate Open Driver circuit for a short to the Liftgate
→ Go To 5
No
5
NOTE: Ensure all the Liftgate connectors are connected before proceeding.
With the DRBIII in Sensors, read the OPTICAL SENS 1 and then OPTICAL SENS
2 counts.
Manually open and close the liftgate while observing the DRBIII .
Did the sensor counts change smoothly for both sensors as the liftgate was moved to
the full stops?
Yes → Replace the Power Liftgate Module.
→ Go To 6
No
6
Disconnect the Power Liftgate Drive Unit connector.
Using a 12-volt test light connected to 12-volts, check the Optical Sensor Ground
circuit (cavity 3) in the harness connector.
Does the test light illuminate brightly?
Yes → Go To 7
→ Repair the Optical Sensor Ground circuit for an open.
No
ACTION
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Close Driver circuit.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
POWER DOORS - LIFTGATE
725
Continued
APPLICABILITY
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