1996 Audi A6 - Anti Theft

[utownmike]

Hi,

I just recently purchased a 1996 Audi A6.
Unfortunately the car did not come with the key remote that disables the alarm. When tinkering with the rear door I somehow managed to engage the anti-theft alarm which locked the engine. Now with my key I am unable to even start the car.
What do I do?

Is there some sort of fuse I can pull out to disable it? Any wires to cut?
I'm stuck without my new car to drive!
Any help would be appreciated!

[a6hcw]

The information about the 1996 Audi A6 anti theft system is in the BentleyPublishers.com Audi shop manual CD.
Have you tried getting out of the car and locking and then unlocking one of the two front doors.
Have you tried disconnecting and reconnecting the battery? Be sure you have the radio code before doing this.
Do you have a VAG-COM from ross-tech.com?
You make have a bad switch or wire in your rear door at the lock cylinder or at the latch.
I have a 1996 Audi A6 Quattro, with a malfunction in the central locking, anti-theft alarm system control module, V94. However, since I don't have the VAG 1598 test box and the Vag 1598/11 adapter harness, which Bentley says to use, it will be difficult to find all of the faults without a lot of extra work.
Per the wiring diagram, the Starting Interlock Relay, J207, is wired to V94, so you can't simply remove the module. V94 is also wired to the multifunction transmission range switch (nuetral safety switch), F125. These parts, V94 and F125, are very expensive, so try fixing the rear door switchs first. Check fuses S8, S10, S114 and circuit breaker A3. (Bentlley had A2 in the instructions and A3 on the wiring diagram.) Next, get a copy of the CD.

[a6hcw]

The V94, central locking, anti-theft alarm system control module in the 1996 A6 is part number 4A0-862-257J. This module is not OBD, so VAG-COM will not show anything. This module has the remote control on another module, J276, part number 8D0-907-335A.
The most likely cause of your problem is a bad switch or wiring. If the problem is intermitent, then it will be difficult to fix without OBD.
In 1997, they changed the V94 and the wiring to allow OBD and to include the remote as part of the new central locking, anti-theft alarm system control module.
Is it possible to convert the 1996 wiring to the 1997 wiring and to the newer module? There are so many switches and wires on a old car which may fail intermitently. The wires fail because they flex everytime the doors are opened and closed. The problem is often at the drivers door, because it is the most used.

[a6hcw]

I compared the 1996 A6 wiring diagram to the 1998 A6 wagon wiring diagram, and I found that the the A, B and C connectors for V94 are not the same. For the B connector the number of pins changed from 6 to 10. For the A and C connectors, the pins are connected differently to V94 and to the wiring harness.
Therefore, the 8L0-862-257B used on a 1998 A6 wagon, is not compatable with the existing 1996 A6 wiring harness.
The "6 pin brown connector" at "connector station 1" has been changed to a 10 pin connector. The Central Locking System Control Module (Remote Control) has become part of the new V94. The Relay for Control Module for Ultra-Sound Sensors has been deleted and replace by the Control Module for Interior Monitoring Sensors. The new V94 requires a Data Link Connector and an external antenna.
Having a V94 with OBD would be great, however the newer V94 just is not a direct replacement. Too many items have been changed, so it would take a very long time and cost more than the car is worth.
Also, I found out that if the vacumn pump disk fails, some people have been able to replace the broken pump with one salvaged from a Passat and put it inside the Audi V94.