I had a clogged air con. condensation drain which subsequently flooded the tcu on my 03 A6. I drove the car to the Nashville, Tn. Audi dealer (thouroughbred motors) they said the transmission and tcu needed to be replaced for $8,600. I told them I'd junk the car before I paid that. After several unpleasant conversations with the service manager I brought the car home. It drives fine other than being in limp mode. I sent the tcu to be rebuilt and also purchased Ross-Tech VaggComm. I installed the rebuilt tcu and the vagg-comm can not communicate with the tcu. I also get fault codes 18032 , 18034(Missing Message from tcu) and 1810 from the engine. The abs brake address also give 18034 fault code. In my opinion either the tcu is bad or there is a bad connection, fuse blown etc. It also displays the message( depress clutch pedal before starting) on the dash info system. It's an automatic.

Any ideas would be appreciated.


Thanks,

Perry

 

faulty resistor in the ECM,
#1


[IMG]local://upfiles/12092/CB488D96347B49E8BA7435C05D52184F.jpg[/IMG]

 

#2

[IMG]local://upfiles/12092/CFF2E783244F4C6B9263348242DF1B61.jpg[/IMG]

 

Thanks Dave,

Looks like I'm going to need the tester kit & connector. Do you know of anyway to check this with just the multimeter?



Thanks,

Perry

 

Check your powers and grounds at the ecm. The water may have shorted a harness blowing a fuse. Never heard of a wet tcm causing a tranmission failure. It sounds like the rebuilt tcm isnt working properly. For the faults your seeing to happen the tcm either isnt powering up or there is a failure in the data bus connections or the rebuild was bad.

 

I would see if your rebuilt TCU was able to work in a friends car