comms error

s3mike · 04-07-2009, 09:41 PM

Hi, sorry if this has come up before, I've looked throught the archives but I can't find any similar problems. I have a 2002 Audi s3, Vag-com works fine I get access to all the controllers except address 08 climate control. on autoscan or individual select module I get "excessive comms error"
the climate control works fine and I can access all the "C" codes.
Can anyone explain the problem and how to get started with repairing it or is it normal?
thanks in advance

Paul · 06-07-2009, 07:32 PM

Its not normal.

Both my 2002, and 2003 S3's worked fine with genuine Ross-tech leads and software.

davidhodgkinson · 06-07-2009, 07:43 PM

Quote:

Originally Posted by s3mike

Hi, sorry if this has come up before, I've looked throught the archives but I can't find any similar problems. I have a 2002 Audi s3, Vag-com works fine I get access to all the controllers except address 08 climate control. on autoscan or individual select module I get "excessive comms error"
the climate control works fine and I can access all the "C" codes.
Can anyone explain the problem and how to get started with repairing it or is it normal?
thanks in advance

I had this with a cheap OBD lead I bought off ebay, as soon as a bought a lead off Ross-tech I never had the errors again.

mb · 06-07-2009, 08:00 PM

I have had a lot of comms errors with the Central Convenience especially using 2 genuine Rosstech leads on 2 Mk IV Golfs. The advice was to pull the fuse for the affected module or disconnect the battery then either leave it disconnected overnight and/or touch the +/- cables together to "bleed" all the capacitors. Both tricks seemed to work, I know disconnecting the battery loses all the fault codes so if you think there may be something wrong with the CC unit try the fuse first (don't know if loses you the errors or not)

04-07-2009, 09:41 PM	#1 (permalink)
s3mike Shank's Pony Join Date: Jun 2009 Posts: 4	comms error Hi, sorry if this has come up before, I've looked throught the archives but I can't find any similar problems. I have a 2002 Audi s3, Vag-com works fine I get access to all the controllers except address 08 climate control. on autoscan or individual select module I get "excessive comms error" the climate control works fine and I can access all the "C" codes. Can anyone explain the problem and how to get started with repairing it or is it normal? thanks in advance

06-07-2009, 07:32 PM	#2 (permalink)
Paul Porsche GT3 Join Date: Dec 2001 Location: UK Posts: 10,944	Its not normal. Both my 2002, and 2003 S3's worked fine with genuine Ross-tech leads and software. __________________

06-07-2009, 08:00 PM	#4 (permalink)
mb Nissan GTR Join Date: Apr 2004 Location: Southampton Posts: 3,838	I have had a lot of comms errors with the Central Convenience especially using 2 genuine Rosstech leads on 2 Mk IV Golfs. The advice was to pull the fuse for the affected module or disconnect the battery then either leave it disconnected overnight and/or touch the +/- cables together to "bleed" all the capacitors. Both tricks seemed to work, I know disconnecting the battery loses all the fault codes so if you think there may be something wrong with the CC unit try the fuse first (don't know if loses you the errors or not)