A4 (B6 Platform) Discussion Discussion forum for the B6 Audi A4 produced from 2002-2005

Dreaded ABS Control Problem!

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Old 12-05-2005, 11:47 AM
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Default Dreaded ABS Control Problem!

ABS warning light is flashing... I paid for a diagnostic ?47 and was told it couldn't communicate and I need a new ABS computer.

I've read loads about this fault and bought an OBD2 cable so I can diagnose it myself (no way am I paying for a new part at ?400!)

Even though the faults are as described in other posts, I can get the fault to go away by wiggling the ABS pump wire underneath the unit, at which point VAG-COM can communicate and everything checks out fine.

Just wondered if anyone had problems with this pump cable corroding. I am going to investigate further tommorow - if it is simply a bad connection I wonder how many people garages rip off with the "Oh, it's a common fault on these Audi's" line!
Old 12-05-2005, 12:40 PM
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which wire are you referring to?
Old 12-05-2005, 12:56 PM
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Default The wire runs from ABS ecu to pump housing

When I wiggle it, there is a lot of clicking (sounds like the solenoids twitching) then the fault clears from the dashboard!
Old 12-06-2005, 07:37 AM
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Well, now you know the problem and how to fix!
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