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Symptom: INCOMPLETE POWER OPEN - OPTICAL SIGNAL MISSING When Monitored and Set Condition: INCOMPLETE POWER OPEN - OPTICAL SIGNAL MISSING When Monitored: Whenever the power liftgate is performing a power open operation. Set Condition: The PLG Module detects that the motor is rotating (monitors optical pulses) but no optical pulses are being detected. This code is set during the power open POSSIBLE CAUSES DTC PRESENT CLUTCH CONDITION BINDING LIFTGATE OPTICAL SENSOR GROUND CIRCUIT OPEN LIFTGATE OPEN DRIVER CIRCUIT SHORT TO LIFTGATE CLOSE DRIVER CIRCUIT OPTICAL SENSOR SIGNAL 1 OR 2 WIRE SHORT TO GROUND OPTICAL SENSOR SUPPLY WIRE OPEN OPTICAL SENSOR SUPPLY WIRE SHORT TO GROUND OPTICAL SENSOR SIGNAL 1 OR 2 WIRE OPEN OPTICAL SENSOR POWER LIFTGATE MODULE - OPTICAL SENSE POWER LIFTGATE MODULE - OPTICAL SENSOR SUPPLY OPEN TEST ACTION APPLICABILITY 1 NOTE: NOTE: When this code is set, the module will abort the power open (Clutch Pulsing(. This is where the module will cycle the Liftgate Clutch Driver until the gate stops moving (based on Optical Sensor t, record and erase DTC’s. Turn the ignition off, wait 10 seconds, then turn the ignition on. t, read ACTIVE DTCs. Does the DRBIII t display INCOMPLETE POWER OPEN - OPTICAL SIGNAL MISSING? All Yes → Go To 2 No → Using the wiring diagram/schematic as a guide, inspect the wiring and connectors for an intermittent condition. Operate the 861 POWER DOORS - LIFTGATE |