dkiser222

My a/c works great while driving but heats up when the car is sitting. The car has on clutch fan and one electric for the a/c condenser. The condenser fan doesn't not run ever. I tested the fan with 12 volts and it fired up immiedatly. I also tested the plug going into the fan and it outputs 10 volts but the fan won't budge. Is this due to a bad fan Control
module.is there anyway to test it or should the fan run on 10 volts?

jakematic

Posting a complete Autoscan along with letting us know what model and year vehicle you have would help immensely.

dkiser222

2004 a6 quattro 2.7t s-line.
Address 01 engine
No faults found

Address 02. Auto transport
No faults found

03 brakes
No faults found

08 auto hvac
No faults found

15 airbags
No faults found

16 steering wheel
01305- data bus for infotainment
80-00- single wire operation
01304 - radio
49-00 no communications

Add. 17 instruments
01304 - radio
49-00 no communications
01311 - information data bus
80-00 single wire operation

Add 35: centr. Locks
No faults found

Add. 36: seat memory
No faults found

Add. 55: xenon range
No fault code found .

jakematic

Unfortunately there is not a lot in your manually transcribed Auto-Scan to go on.

Other than the fact you have an issue with the radio.
If it's aftermarket it might just need to be coded.

You might look at erWin to find out what the specs are for the fan and module in question.
I'd also have a look at running the output tests with VCDS to see what the results are.

dkiser222

so, i replaced the fan control module today hoping that it would solve my problems but still no luck. im still getting the same output of 11 volts at the fan plug but the fan doesnt run. it works fine when it gets 12 volts, can anyone help with this??? im on the verge of hooking up my own relay just to make it work but i would rather figure this out and fix it the right way

jakematic

Have you checked MVB 135 and run any output tests ?
Output test should trigger a DTC that would help in troubleshooting.

Check ground points, voltage to FCM, traces, etc.
See also http://forums.ross-tech.com/showthre...r-Positive-etc

erWin suggests replacing the fan along with the module.
However, I am not convinced the module was bad in the first place.

And last, but highly important, what is your measured voltage at the battery ?