Quote:
Originally Posted by secmil
I'm currently working on getting mine to work on my '98 A4, and was wondering where you were able to tap into the fuel consumption signal...
I was looking through all of the wiring diagrams in the bentley manual, but I guess I missed that whole section.
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Ahh...an Audi owner to commiserate with!
Bentley wasn't much help for me. I found a thread on AudiWorld on retrofitting a trip computer. The fuel consumption signal came from a connector behind the passenger kick panel. I checked my car and it has the proper color wire in that spot. I hooked up the scope and it looks like the right signal.
It's a Blue/Black wire in the red connector here:
I removed the connector bracket, pulled the connectors and pushed a solid wire into the top of the connector to bring the signal out to where I could attach an alligator clip:
Remember, this is a 97 Audi A6. I don't know if the A4 will have this signal in exactly the same place. Audi is, however, pretty consistent. Since the A4 has a trip computer as an option, there must be a consumption signal somewhere. I'll bet that you will find a Blue/Black wire in a red connector in roughly the same place.
For the VSS, I found a schematic that showed the VSS going to the cruise control module. I pulled the module connector and found the signal there on a White/Blue wire. I found the same colored wire behind the kick panel and a continuity check showed them to be connected. So, I pushed a solid wire into the kick panel connector to bring that signal out.
Let me know if have any questions. Good luck.
Bob.