Liberty Sport 4WD L4-2.4L VIN 1 (2002)
Trunk/Liftgate Sensor/Switch (For Alarm): Description and Operation
FLIPUP GLASS AJAR SWITCH
A flip-up glass ajar switch is standard equipment in this vehicle. This switch is concealed within and integral to the flip-up glass latch unit. The
switch is a momentary leaf contact-type unit that is actuated by the flip-up glass latch mechanism. A dedicated connector receptacle on the flip-up
glass latch unit connects the flip-up glass ajar switch to the vehicle electrical system through the tailgate wire harness. The flip-up glass ajar switch
cannot be adjusted or repaired and, if faulty or damaged, the flip-up glass latch unit must be replaced.
The flip-up glass ajar switch is actuated by the flip-up glass latch mechanism. When the flip-up glass is closed and properly latched, the flip-up
glass ajar switch is an open circuit. When the flip-up glass is open or only partially latched, the flip-up glass ajar switch is a closed circuit. The
flip-up glass ajar switch is hard wired between a body ground, the Body Control Module (BCM), and the rear wiper motor. The output of the
switch is connected to the BCM and rear wiper motor through a flip-up glass ajar switch sense circuit. The BCM reads the flip-up glass ajar switch
status through an internal pull-up, then uses this input to control many electronic functions and features of the vehicle. The rear wiper motor uses
this input to restrict rear wiper operation when the flip-up glass is ajar. The flip-up glass ajar switch can be diagnosed using conventional
diagnostic tools and methods; however, for proper diagnosis of the BCM and both the hard wired and electronic BCM outputs affected by the
flip-up glass ajar switch input a DRBIII scan tool is required. Refer to the appropriate diagnostic information.
