Power Close

The power liftgate power close operation begins when the LTM receives an input from one of the following:

• The LTM receives a momentary ground signal from the instrument panel power liftgate switch.
• The LTM receives a momentary ground signal from the rear power liftgate switch.
• The BCM receives a signal from the RKE transmitter (double button press).

Once the LTM receives an close request, it closes the power liftgate by carrying out the following:

• The LTM checks the gear selector lever position and vehicle speed status from the MS-CAN  .
• The LTM starts an audible chime.
• After 1 second of audible chime, power is supplied to the drive motor as the audible chime continues 3 seconds total.
• As the power liftgate is powered closed, the position sensor is monitored for liftgate position and velocity. The power liftgate reverses if an obstruction is detected.
• Also, as the power liftgate is powered closed, the pinch strips are monitored for a pinch condition. The power liftgate reverses if an obstruction is detected by either pinch strip.
• The power liftgate detent switch, primary forkbolt switch and secondary forkbolt switch circuits are monitored for correct latch states.
• The LTM receives switch states indicating the secondary latch position is reached, power is supplied to the unlatch/cinching motor to pull the liftgate into the primary latch position. When primary latch position is reached, power is removed from the drive motor.
• When the LTM receives switch states indicating the primary latch position has been reached (liftgate is fully closed), the LTM reverses the direction of the unlatch/cinching motor until the sector gear switches indicate the neutral position.

If any of the power liftgate switches or the button on the RKE transmitter is pressed during a power close, the liftgate stops and holds its position.