Optical Sensor: Description
WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
Vehicles equipped with a power liftgate utilize a optical sensor (Fig 1). 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 connector.
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.