Hi, my Q7 from 2006 has some trouble with the keyless system.

For starters locks never open by just touching door handles. Handles have to be manually opened once, then locks open and door can be opened normally. According to manual this happens at least when car is in powersaving-mode.

Another thing is that none of the locking buttons in handles work.

Fob batteries have been replaced. Any ideas what do to next? Are all door handles faulty or can it be just one?

Fault codes from module 05:

Address 05: Acc/Start Auth. Labels: 4F0-910-852.lbl
Part No SW: 4F0 910 852 HW: 4F0 905 852 B
Component: FBSAUDIC6 ELV H31 0220
Revision: 31050601 Serial number: 10604000332674
Coding: 0000135
Shop #: WSC 65170 123 08111
VCID: E3CEAA7A5B3D

Part No: 4F0 910 131 G
Component: FBSAUDIC6 EZS H45 0070

Part No: 4F0 910 335
Component: FBSAUDIC6 KSG H27 0080

5 Faults Found:
00190 - Driver's Door Handle Touch Sensor (G415)
011 - Open Circuit

00192 - Left Rear Door Handle Touch Sensor (G417)
007 - Short to Ground

00193 - Right Rear Door Handle Touch Sensor (G418)
007 - Short to Ground

00190 - Driver's Door Handle Touch Sensor (G415)
007 - Short to Ground

00192 - Left Rear Door Handle Touch Sensor (G417)
011 - Open Circuit - Intermittent


Driver door (other doors display similar messages):

Address 42: Door Elect, Driver Labels: 4L0-910-793-42.lbl
Part No SW: 4L0 910 793 B HW: 4L0 959 793 B
Component: TSG FA H12 0130
Revision: 00-00000
Coding: 0019147
Shop #: WSC 31414 790 00001
VCID: 2F66964AC775

2 Faults Found:
02126 - Central Locking Button; Exterior Door Handle
008 - Implausible Signal
02124 - Exterior Door Handle Switch
008 - Implausible Signal - Intermittent

 

I've had all four door handles replaced under warranty due to bad grounds. I've also had the ignition lock cylinder replaced as it had a bad ground and was screwing up the whole smart key system. I don't think the components were very robust in the early years. Since mine was done under warranty, there was no "fixing" of components, just remove and replace. You might want to take a door handle off and take it apart and see what you find. You might be able fix it yourself. Good luck.

 

Also the faulty door locks remain active causing a drain on the battery and activating the power save mode.
You may have noticed occassional low battery for no apparent reason in quite a short space of time.
Hopefully you can fight a good corner with the info pchansen has given you and resolve all issues.
The fact that they have not been done implies to me this car had a previous owner who stored it indoors without locking up.
Just hope it either does not have a sunroof or the TSB has been carried out!

 

Are you sure that the handles are causing battery drain now? I don't think the car has really gone in powersave-mode because everything else works as normal.

I can lock the doors without problems with the remote so there is no problem with car locking, I just cannot do it from the handles.

What is the TSB on keyless system? No sunroof but how is that related?

When dealer is fixing this issue are they just replacing the handles or is something else needed?