Hi all

Just bought an A4 convertible with a dodgy roof. Guy has had it sitting for a while and stated that the roof did work before but doesn't now.

upon getting the car home the 6 week old battery didn't hold a charge and left me stranded outside the chippy.

heres the facts....

1. central locking doesn't work

2. windows don't work

3. roof is dead

4. interior lights don't work

5. soft top warning keeps saying its not shut

Ok, a little faultfinding tonight however I do believe the comfort control module is at fault here with all these issues.

1. the thick red wire going into the pump is getting a constant 12v even when the ignition is off. seems strange to me but I'm not an audi engineer

2. all the fuses are intact

3. replaced battery however I do think there is a draw coming from somewhere to have killed the last battery (thank god for Halfords warranty and an owner that kept receipts)

4. pump looks totally dry (moisture wise) but without a more in depth diagnostic machine we couldn't run it

5. vag com says that fuse 30 was open circuit - could have just us dicking about with it.

 

Are we on the right track here? the comfort control module surely does all these things. I've bought a pump to be belt and braces but these things are around £180 second hand

 

 

Ok follow up to this.

 

comfort unit replaced, old one was totally knackered due to water ingress

i think the windows have been open for some time with the amount of water that was inside the black box.

Using my xtool obd scanner I was able to test the solenoids in the pump and I can here them all ticking.

The main faults the scanner is picking up is that the door modules aren’t there. Now I’m thinking the door modules are either disconnected or suffered the same fate as the comfort module

Still no locks, windows or roof working...

 

 

I have the same issue, did you get this resolved? Bought a new old CCM, got the windows and locks working, no top. 

Is the pump working? 

I do feel your pain as I need a new ccm in my a6.