Towbar install goes a bit wrong - need help coding module 34 level control

[Sam]

Coding instructions for the Westfalia electrics kit on an A7 are here - http://www.westfalia-automotive.de/f...391101-007.pdf

Adjusting the coding The AM code required can be found in the “coding supplement” on the Audi dealer portals (including ServiceNet).
– Connect a suitable vehicle diagnostic, testing and information system to the vehicle via an online connection, e.g. the vehicle
diagnostic, testing and information system -VAS 5051B-.
– Select (Functions and Components) ((Funktions und Bauteilauswahl)).
– Select the “Direct input of AM code for vehicle alteration” (“Direkteingabe AM-Code für Fahrzeugumbau”) testing programme
from within Action Management (AM).
– When prompted, enter the corresponding code (050 200).
– Code the control unit in the self-diagnosis using the VAS tester:
• 69 trailer function
o 008 Codierung
ƒ Masterbyte-Index (Hex-Code):
0. ...
1. 09 -> 00
2. 08 -> 00
3. ...
4. ... etc.
– Call up the fault memory of all control units and delete the “Undervoltage” (“Unterspannung”) fault as necessary.
– Test towing functions using a suitable tester (with load resistors) or a trailer.

[jbanfie]

Hi Sam,

Yes that's the printed booklet that comes with the towbar, the coding it refers to is that of the trailer module number 69. I have the issue with module 34.

After about 6 phone calls, and some sterling work, no one actually knows the coding for an Air Suspension (J197) module on an A7, so I'm off to SP Diagnostics (PF Jones got them to call me) tomorrow and they are going to plug me into VAS for free, as they want to know how to code the air suspension for future reference.

support@ross-tech have given me a pretty good steer too although they do not have a complete coding for the module either - I'll tell all tomorrow, but it's safe to say the problem of coding a towbar on an air suspension A7 is solved.

[jbanfie]

Right, so I spent nearly 3 hours at SP Diagnostics and we recoded the car using VAS to install the tow bar.

The correct coding for the air suspension module is 008001, with bit 1 of byte 2 (0,1,2) being used to indicate the tow bar is fitted.

However, the VAS stuff also coded:

The rear electric boot hatch
The parking sensors
The adaptive headlights

I think it also changes the rear lights so if you put the fog lights on, it doesn't light them on the car, just the trailer, then you don't get a load of red light reflected off your caravan! I'm going to test this.

The long and short of it is that currently the after market tow bar fitters haven't caught up with new Audi technology.

PF Jones are definitely honest people, and the Westfalia towbar is very good, I'd get the coding done at an independent Audi Specialist who has the VW Audi VAS system, and not pay the £70 coding to PF Jones until the Westfalia Coding unit is improved.

[heehaw]

This has happened to me with my install, many thanks for posting.