Body Closures

Body Closures

The power liftgate feature allows the customer to automatically open or close the liftgate by activating the instrument panel control button, activating the Remote Keyless Entry (RKE) transmitter, lifting the exterior handle (open only) or activating the rear quarter trim-mounted switch (close only). The power liftgate uses a power cinching system to latch the liftgate.

Power liftgate operation requires the vehicle to be in PARK and the vehicle speed to be less than 5 km/h (3 mph).

To manually open the power liftgate, due to power latch loss of function, remove the latch access cover located on the lower center of the liftgate trim panel. Reach in on the right side of opening, and push down on the manual latch release lever.

The power liftgate feature suspends a power open or power close when the ignition key is moved to the START position. The clutch will remain active to hold the liftgate in place during a start operation. Once the ignition key is no longer in the START position, the liftgate power open or power close will resume. If the ignition key is cycled during a power close and the liftgate is 15 cm to 24 cm (6 in to 10 in) from being latched, the liftgate may reverse to the full open position.

The power liftgate feature can be enabled/disabled from the message center. When the power liftgate feature is disabled (OFF), operation from the liftgate handle and liftgate rear control switch are disabled.

The power liftgate system consists of the following components:

- Power liftgate control switch (located in the instrument panel)
- Power liftgate rear control switch (located in the LH rear quarter trim panel)
- Exterior handle switch
- Power liftgate motor (located behind the LH rear quarter trim panel)
- Power liftgate clutch (part of the liftgate motor)
- Power liftgate rod (attached to the power liftgate motor assembly and liftgate mounting stud)
- Position sensor (located in the power liftgate motor assembly)
- Pinch strip switches (located on the liftgate sides)
- Power liftgate latch (located in the middle lower of the liftgate)
- Forkbolt switches (located in the power liftgate latch)
- Sector gear switches (located in the power liftgate latch)
- Detent switch (located in the power liftgate latch)
- Unlatch/cinching motor (located in the power liftgate latch)
- Liftgate/Trunk Module (LTM) (located behind the left rear quarter trim panel)

The power liftgate is controlled by the LTM.

NOTE: The Smart Junction Box (SJB) may also be identified as the Generic Electronic Module (GEM).

The LTM receives inputs from the following components:

- Forkbolt switch - primary (determines the position of the latch)
- Forkbolt switch - secondary (determines the position of the latch)
- Sector gear open switch - open (determines the sector gear position)
- Sector gear close switch - close (determines the sector gear position)
- SJB (exterior handle)
- Detent switch (determines the position of the latch)
- Power liftgate control switch (located in the instrument panel)
- Power liftgate rear control switch (located in the LH rear quarter trim panel)
- Pinch strip switches (determines if an obstacle is between the pinch strip and the liftgate body opening)
- Position sensor (determines the direction, travel speed and obstacle detection of the liftgate)
- Controller Area Network (CAN) serial communication link

The LTM sends outputs to the following components:

- Liftgate motor
- Liftgate clutch
- Unlatch/cinching motor
- Liftgate chime
- SJB (ajar status)

The liftgate chime sounds an audible chime (located on the power liftgate motor assembly) for 3 seconds whenever a powered closing operation is initiated or if conditions are not correct for closing. The chime sound serves as a warning to alert the vehicle occupants and any bystanders that the liftgate is being moved in a closing direction by a powered operation. The gate will not be moved for the first second, as a pre-warning of impending gate movement.

The power liftgate may not operate under the following conditions:

- Low voltage or dead battery
- Disconnected battery
- Power liftgate that has been manually closed and left ajar

If any of these conditions have occurred, the power liftgate must be re-initialized before carrying out any pinpoint tests. Refer to Power Liftgate Initialization Programming and Relearning.