2011 Q7 wipers inoperable, error - Windscreen wiper defective

RexNICO

Veteran Member
Joined
Sep 17, 2013
Location
South West OH
TDI
2011 Tiguan, 2011 Q7
This popped up Thursday morning while ~150 miles from home and the wipers would not work. Turned a 2 hours drive into a very long drive waiting out the storms.

The error message might be windshield wiper defective (putting both in the post to help future searches).

Below is the 09-Cent. Elect. snippet from a complete Auto Scan. I did go into 09-Cent. Elect., cleared the DTC and it comes back instantly.

Most of my googling returns others with the error, but those posts report functioning wipers, while ours are not.

Before we got home to the scanner, we tried
Cycle car (several times, not change)
Hand movement of the wiper arms to see if they were jammed - no resistance, but did not move them very far (2-3 inches measured at the center of the wiper blade)
Opening/closing hood (read Q7 wipers will not operate with open hood) - no change and instrument cluster does not indicate hood open when it is closed.

Any help would be greatly appreciated.

Thanks
=======================================================================
Address 09: Cent. Elect. Labels: 4F0-910-279.lbl
Part No SW: 4F0 910 279 AG HW: 4F0 907 279 C
Component: ILM Fahrer H29 0390
Revision: 00000000 Serial number: 4F0907279
Coding: 0139123
Shop #: WSC 31414 790 00001
VCID: 6E8533FC7C97FD2B2D3-803A

Subsystem 2 - Part No: 8K0 910 557 Labels: 8K0-955-559.CLB
Component: REGENLICHTSENSORH04 0003
Coding: 00150059
Shop #: WSC 31414

Subsystem 3 - Component: Fehler Lin-Slave 01

1 Fault Found:
00908 - Control Module for Wiper Motor
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 1
Fault Frequency: 1
Reset counter: 81
Mileage: 262136 km
Time Indication: 0
Date: 2022.09.03
Time: 10:45:00

=======================================================================
 

Nero Morg

Top Post Dawg
Joined
Oct 19, 2017
Location
OR
TDI
2014 A6 TDI, 2001 Jetta TDI, 2014 Passat TDI
No communication, but no short to B+ or ground makes me think a CAN line issue. Maybe a loose connection and some water got in it?

Funny they had to use a module for the wipers....
 

RexNICO

Veteran Member
Joined
Sep 17, 2013
Location
South West OH
TDI
2011 Tiguan, 2011 Q7
Sorry for not updating this earlier.

After Nero's reply, I started with the basics - fuse was blown.

Okay, easy/peasy replace the fuse, well the replacement fuse blew as I was inserting it. Maybe a bigger fuse? (kidding)

Research how to remove the wiper motor and mechanism, and beyond the hassle of getting the arms to come off the posts nothing too complicated. next I tried to disassemble the motor assembly and it seems the motor is seized into the casing. So, I ordered a replacement unit.

Once the unit arrived, I was able to get the new motor and wiper arm "transmission" installed. The final difficult step was getting the transmission arms onto the pivot and the wipers set to the proper position.

On a related note, I applied Rain-X product to the front windshield & rear window on both of our Q7's and replaced the plastic cowl on this Q7, as the existing 1 had a folded edge where it sets into the groove at the bottom of the windshield - OEM piece for $140 shipped didn't feel too bad.

Thanks
 

braddies

Veteran Member
Joined
Jul 26, 2021
Location
America
TDI
03 golf ALH
+1 for RainX, stuff is awesome. Favorite way is to buff Nu-finish once a year car polish on the glass, clean with rubbing alcohol and then put the rainX on, rain just beads right off.
Glad you got it fixed! Wondering what caused this in the first place..
 

RexNICO

Veteran Member
Joined
Sep 17, 2013
Location
South West OH
TDI
2011 Tiguan, 2011 Q7
Follow-up

Wipers have not seemed normal ever since the R&R with what was sold as an OEM part. And I finally got tired when the pass side wiper pulled the drivers side wiper/blade off the arm while driving on the interstate in a heavy down pour.

I've since pulled a used unit off a Q7 at the local self serve salvage yard and replaced with the motor/brain and transmission. Function/movement seems much better, now we wait for it to rain.
 
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