Test Z: The Power Liftgate Is Inoperative

PINPOINT TEST Z: THE POWER LIFTGATE IS INOPERATIVE

Z1-Z4:

Z4-Z5:

Z5-Z6:

Z6-Z7:

Z8-Z9:

Z10-Z12:

Z12-Z14:

Z14-Z16:

Z16-Z19:

Z19-Z20:

Z21-Z23:

Z23-Z24:

Z25-Z27:

Normal Operation
If the power liftgate is operated from the overhead console open/close switch, circuit 2054 (YE) is grounded by the open/close switch. Then the SJB grounds circuit 700 (WH/VT), which signals the PLG module of the open/close request.

If the power liftgate is in the CLOSED position and the conditions are correct, the PLG module supplies 12 volts to the unlatch actuator on circuit 2058 (LB/RD) and 12 volts to the clutch on circuit 2062 (LG/RD) and 12 volts to the motor on circuit 2060 (RD/BK). As the liftgate is moving in the open direction, the PLG module monitors the position sensor for obstacles.

If the power liftgate is in the OPEN position and the conditions are correct, the PLG module supplies 12 volts to the clutch on circuit 2062 (LG/RD) and 12 volts to the motor on circuit 2061 (VT/WH). As the liftgate is moving in the close direction, the PLG module monitors the position sensor and the pinch strips for obstacles.

Possible Causes
- PLG module DTC B2483 Park Signal Open Circuit
- PLG module DTC B2605 VSS Signal Open Circuit
- PLG module DTC B2704 Optical Sensor Power Short To Ground
- PLG module DTC B2713 Unlatch Output Short To Ground Or Open
- PLG module DTC B2819 Gate Motor Circuit Short To Battery
- PLG module DTC B2908 Latch Switch Invalid
- PLG module DTC B2931 Optical Sensor 1 Short To Battery Or Open
- PLG module DTC B2932 Optical Sensor 1 Short To Ground
- PLG module DTC B2933 Optical Sensor 2 Short To Battery Or Open
- PLG module DTC B2934 Optical Sensor 2 Short To Ground
- PLG module DTC B2935 Drive Unit Failure
- PLG module DTC B2936 Gate Motor Open
- PLG module DTC B2937 Gate Motor Short To Ground
- PLG module DTC B2938 Gate Clutch Short To Battery
- PLG module DTC B2939 Gate Clutch Short To Ground Or Open
- PLG module DTC B2944 Unlatch Output Short To Battery
- circuit 1205 (BK) open
- circuit 1431 (PK/BK) open
- circuit 1434 (LB/PK) open
- circuit 1962 (LG/VT), 1963 (OG/LB) or 1964 (DG/WH) open or short to ground
- circuit 1968 (YE) or 1969 (WH/YE) open, short to voltage or short to ground
- circuit 1970 (RD/LB) open or short to ground
- circuit 1971 (LB/OG) open
- circuit 2058 (LB/RD) or 2059 (WH/RD) open, short to voltage or short to ground
- circuit 2060 (RD/BK), 2061 (VT/WH), 2062 (LG/RD) or 2063 (BN/WH) open, short to voltage or short to ground
- circuit 2067 (RD/WH) open
- power liftgate latch
- motor/clutch assembly
- optical sensor
- PLG module