1998 Audi A6 2.8

I think my ABS control module is busted, but the Vag-Com won't even recognize it. Any Ideas??
I want to make sure before I spend money on a new one.

Thanks

 

The VAG-COM not recognizing it is a symptom of a bad module. What other symptoms do you have? BRAKE light and associated beeps at start-up? ABS light on steady?

Check out WWW.ModuleMaster.com. Once you confirm it's the module, they can rebuild it for you for ~$250.

 

2001 and new will pull a code for failure to communicate but the older ones won't.

 

I shorted out the ABS module when I was trying to re-wire my foglights. I'm sharing this because the members of the forum cannot abuse me any more than my lovely forgiving spouse did. An OEM unit is $900 but I found a place in Idaho (Module Master)that purports to rebuild it for $200. The unit is on it's way and I'll try to remember to post whether this effort is successful.

(2003 A6 2.7T MT6)

 

Beeps at Startup, ABS light in brack light flashing, and this is the wierd one- Tach stops working, and the A/C compressor doesn't work.
When the ABS module is unplugged, Tach comes back as well as the A/C. I understand that the tach and abs are all part of the Can-Bus system, but I havent found a mechanic yet that has heard of this happening before. Does anyone have a pinout so I could check for shorted wires??? I don't want to spend $200 if it doesnt fix he problem. BTW, thanks for the information posted!!

 

Guys, have you found the problem? I'm facing the same problem. My Audi A6, C5, 1998, has the ABs light on. When press the brake pedal (car in idle), RPM stays crazy (up and down). Also, no AC working...