Hi rktec
As Skipton indicated, a diagnostic scan is the best starting point for troubleshooting most problems nowdays. If you don't have easy access to VagCom then a simple check you can do is inspect the ABS sensor wires on the front wheels. The wider tyres on the Sport models have a tendency to rub through these wires and cause this type of fault.
http://www.a2oc.net/forum/showthread.php?t=3325&highlight=worn+wire
Cheers Spike
Hi A2SPORT
As Skipton said in a previous post, Audi issued a service bulletin specifying that shorter sensor wires should be used on models with 17" rims. Part nos were 8Z0.927.904F for the front left wire and 8Z0.927.904G for the front right. Strangely these numbers dont appear to be listed in the later parts book. Its possible Audi have standardised on a shorter cable under a different part number but its worth asking if the old parts are obsolete and if so, what the supersession is. (personally I would go for the old part nos if you can get them)
Cheers Spike
Optical wiring systems are only used on the A6, A8 and Q7 models, fitted with the MOST bus system.
No A2 has any optical communication as standard.
It's good that youhave repaired the break without resorting to the dealer - this type of repair will become more important in the years to come!
Cheers,
Mike
Thanks to all who helped with ideas on the cause of the problem. I printed them all off and handed them them to the dealer; also mentioned that 14 months is a long time for a dealer to find even an intermittant fault they could keep it till they had fixed it. With hindsight, this probably lacked diplomacy but really! 14 months and they are supposed to be Audi experts.
Anyway, the result is that they gave me long enough to get home then phoned me and told me they didn't know what was wrong with it and could they have it back when the fault was happening? (They already did and couldn't fix it then either) The fault has happened twice since on my way to work but when I started the car again it had gone.
Can anybody recommend a good auto electrician in the Hull area? Anybody ?
Hi
The F84 (same as F83) brake recognition switch is part of the brake servo and not replaceable as a separate part. The assy is about £400 plus a similar ammount for labour so its the last thing anyone would want to change. Ref the attached link, other people have fixed this fault by replacing the brake master cylinder and 2 brake pressure sender units (think they screw into the underside of the master cylinder.
http://www.ilexa.co.uk/forum/index.php/topic,12221.0.html
You could print this off and show it to your garage
Cheers Spike