Could a faulty ignition switch cause VAG communication issues?
09-20-2007, 05:01 AM
#1
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Could a faulty ignition switch cause VAG communication issues?
The car is a 94 Cab. It runs great, but communication with the VAG is spotty at best. I've never had success communicating with the airbag module.
Thanks in advance.<ul><li><a href="https://forums.audiworld.com/9080/msgs/418369.phtml">https://forums.audiworld.com/9080/msgs/418369.phtml</a</li></ul>
Thanks in advance.<ul><li><a href="https://forums.audiworld.com/9080/msgs/418369.phtml">https://forums.audiworld.com/9080/msgs/418369.phtml</a</li></ul>
09-20-2007, 05:05 AM
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Ignition switchs are crap on the 90's and Cabbies, but I've never heard...
it interfering with the VAG. Best to get a hold of the wiring schematics from a Bentley Manual too diagnose your problem.
09-20-2007, 05:47 AM
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I've got the Bentley. I disconnected all of the K wires from their
terminal to see which one was shorted to +12 volts. I was surprised to see that almost all of them were over 10 volts. Ross-Tech says they should read between 1 and 9 volts.
I started looking for something all the systems/modules have in common. I swapped instrument clusters, no change. Now I'm thinking ignition switch.
If anyone can think of anything else don't be shy.
I started looking for something all the systems/modules have in common. I swapped instrument clusters, no change. Now I'm thinking ignition switch.
If anyone can think of anything else don't be shy.
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09-20-2007, 08:11 PM
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As a matter of fact...yes
Just had a mkIV Golf where we thought it was the connector or even the connector on the VAG-com so we tried another unit and it did the same thing.
To make a long story short we noticed some other odd acc issues, so we rpelaced the switch and the VAG-com started to work.
To make a long story short we noticed some other odd acc issues, so we rpelaced the switch and the VAG-com started to work.
09-21-2007, 05:05 AM
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Interesting. . . I picked up a switch at my local dealer yesterday.
I'll install it tonight and see if it solves my problem. . . I'll share my findings here, and maybe on the VAG forum as well.