957 Cayenne rear hatch / tailgate problem

[sinclair]

2009 Cayenne S. Power tailgate stopped opening/closing. Open button above the license plate causes the latch to release and the door to open about 1/2", but the power lift mechanism doesn't engage. I can manually open and close the door. When closing it manually, the power mechanism pulls the hatch in the last 1/2" and latches closed.

Glass hatch release button works fine. Remote control hatch button does nothing. Close button on the bottom right of the hatch is lit but does nothing.

Checked all fuses on the right and left sides of the instrument panel, and the one on the battery. All good.

Durametric is giving me the following faults:
- 3074 Rear lid tilt angle sensor short circuit to B+ (I replaced the sensor - no change)
- 1341 Instrument cluster no signal / communication transient fault
- 908 Wiper motor no signal / comm transient fault
- 668 Vehicle voltage terminal 30 inplausible signal transient fault

All other systems on the car are working fine.

So what might be the issue? Gateway problem?

Help appreciated.

Pete

[Loren]

Fuse

Short to ground or open circuit (bad grounds are common for Cayenne)

Low battery voltage

Then start checking individual control units