Rear Hatch_Gate Description and Operation

Rear Hatch/Gate Description and Operation Liftgate/Liftgate Window Release Components The liftgate release system consists of the following components: Body control module Lighting control module Rear gate module (TC2) Liftgate latch assembly Exterior liftgate release switch Exterior liftgate window release switch Liftgate window latch Liftgate window release relay Liftgate Latch Assembly

Note

The function of the liftgate latch and the liftgate window latch will be disabled if the rear wiper motor has been activated and wiping the liftgate window When the passenger door, right rear door and liftgate have been commanded to lock with a door lock switch or a keyless entry transmitter, the exterior liftgate release switch will become inoperative the same way the passenger door handles will become inoperative to prevent unauthorized access. Also the passenger and right rear doors must be commanded to unlock to enable the exterior liftgate release switch. When the exterior liftgate release switch is pressed, the body control module will provide B+ voltage to the liftgate latch unlatch control circuit and ground to the unlock control 2 circuit causing the liftgate latch assembly to perform the unlatch function releasing the liftgate and allowing the liftgate to be pulled open. Liftgate Window Latch Assembly Exterior Liftgate Window Release Switch The lighting control module (TB4) or the rear gate module (TC2) monitors supplies a 12 V signal to the liftgate window unlatch switch so that when the switch is pressed, the voltage within the signal circuit is pulled low and in response, the lighting control module (TB4) or the rear gate module (TC2) will detect the voltage drop and send a serial data message to the body control module to command the liftgate window to release. Liftgate Window Latch When body control module receives a liftgate window release command from the liftgate window unlatch switch, the body control module applies voltage to the liftgate window unlatch relay control circuit, which energizes the coil side of the relay. The switch side of the liftgate window unlatch relay then momentarily closes, supplying a brief pulse of battery positive voltage to the liftgate window latch. The liftgate window latch is continuously grounded and when it receives the voltage pulse, it will become energized and the latch will activate releasing the liftgate window so that it may be manually raised to an open position.