Test A: The Power Liftgate Is Inoperative - Does Not Open or Close

PINPOINT TEST A: THE POWER LIFTGATE IS INOPERATIVE - DOES NOT OPEN OR CLOSE

A1-A3:

A3-A5:

A5-A6:

A7-A8:

A9-A11:

A12-A14:

A14-A16:

A16-A19:

A19-A21:

A21-A23:

A23-A24:

A25-A27:

A27-A28:

A29-A31:

Normal Operation
If the power liftgate (PLG) is operated from the PLG control switch (instrument panel), circuit CPR63 (GY/YE) is grounded by the open/close switch, which signals the PLG module of the open/close request.

If the PLG is in the closed position and the conditions are correct, the PLG module 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 PLG module monitors the position sensor for door speed to detect obstacles.

If the PLG is in the open position and the conditions are correct, the PLG module 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 PLG module monitors the position sensor for door speed to detect obstacles.

Possible Causes
- PLG module diagnostic trouble code (DTC) B106E solid state driver disabled due to short circuit
- PLG module DTC B106F module disabled due to external fault
- PLG module DTC B117A latch motor circuit short to ground
- PLG module DTC B117B latch motor circuit open
- PLG module DTC B1179 latch motor circuit short to battery
- PLG module DTC B2418 sensor power short to ground
- PLG module DTC B2419 sensor 1 invalid
- PLG module DTC B2420 sensor 2 invalid
- PLG module DTC B2552 vbatt 2 circuit open
- PLG module DTC B2819 gate motor circuit short to battery
- PLG module DTC B2908 latch switch invalid
- 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 B2939 gate clutch short to ground or open
- Open in circuit SBB27 (BU/RD), SBP14 (BN/RD), GD149 (BK/GY) or RPR55 (WH/BU)
- Open or short to ground in circuit CPR64 (VT/OG), CPR65 (BU/GN), CPR66 (GY/YE) or CPR55 (GN/BU)
- Open, short to voltage or short to ground in circuit VPR53 (BU/WH), VPR54 (BU/BN), CPR61 (BN), CPR62 (WH/BU), CPR57 (GN/WH), CPR58 (GN/OG) or CPR69 (BN/BU)
- Fuse(s)
- PLG latch
- Motor/clutch assembly
- Optical sensor
- PLG module
- PLG rod