Test A: The Power Liftgate Is Inoperative - Does Not Open Or Close
PINPOINT TEST A: THE POWER LIFTGATE IS INOPERATIVE - DOES NOT OPEN OR CLOSENormal Operation
If the power liftgate is operated from the power liftgate control switch (instrument panel), circuit CPR63 (GY/YE) is grounded by the open/close switch, which signals the liftgate/trunk module (LTM) of the open/close request.
If the power liftgate is in the closed position and the conditions are correct, the LTM supplies 12 volts to the unlatch/cinching motor on circuit CPR62 (WH/BU), 12 volts to the clutch on circuit CPR69 (BN/BU) and 12 volts to the motor on circuit CPR57 (GN/WH). As the liftgate is moving in the open direction, the LTM monitors the position sensor for door speed to detect obstacles.
If the power liftgate is in the open position and the conditions are correct, the LTM supplies 12 volts to the clutch on circuit CPR69 (BN/BU) and 12 volts to the motor on circuit CPR58 (GN/OG). As the liftgate is moving in the close direction, the LTM monitors the position sensor for door speed to detect obstacles.
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Power liftgate latch
- Motor/clutch assembly
- Optical sensor
- LTM
- Power liftgate rod
- Wiring, terminals or connectors
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