My vRS SE has recently developed an ABS/ASR fault.

 

I was on my way to the chip shop.  I pulled out of a junction fairly quickly and wheel spun a bit.  The ASR light flashed as normal and I could feel the power back off briefly as expected.  Straight afterwards the ASR and ABS lights came on together and stayed on.  I got to the chip shop and switched the ignition off.

 

When I started it back up the ABS and ASR lights stayed on for longer than normal and then went out.  I drove a few hundred metres and decided to see if the fault would occur again if I wheel spun.  I pulled away from a junction wheel spinning on purpose and the same thing happened.

 

The next time I drove my car (to work), the warning lights came on whilst reversing out of my drive and I drove with them on all the way to work (70 miles).  Later on the same day I was driving from work.  The lights had gone out and I managed to drive for about 100m out of the yard at work without a problem at speeds of not much more than 10 mph.  Once I pulled out on to the main road and accelerated, the ASR light started flashing and the car throttled back but I was not skidding/spinning.  A few seconds later both lights came on and the system was again disabled.

 

Since then the warning lights have been on permanently.  I did a scan with VCDS and the results for the ABS ECU were as follows:-

 

 

Address 03: ABS Brakes        Labels: 6R0-907-37x-ASR.lbl

   Part No SW: 6Q0 907 379 AG    HW: 6Q0 907 379 AG

   Component: MABS 8.0 front  H05 0002  

   Revision: 00000000    Serial number: 00000000000000

   Coding: 0002229

   Shop #: WSC 13765 790 00000

   VCID: 820EAAADDE0B2208B6F

 

1 Fault Found:

00283 - ABS Wheel Speed Sensor; Front Left  (G47) 

            008 - Implausible Signal

             Freeze Frame:

                    Fault Status: 01101000

                    Fault Priority: 2

                    Fault Frequency: 8

                    Reset counter: 37

                    Mileage: 236066 km

                    Time Indication: 0

 

I fitted a new wheel speed sensor and cleared the fault but it came back on by just driving about 10m at no more than 10mph.  The wiring and connector to the sensor look fine.  If you try and monitor the sensor whilst driving, it gives no signal at all.

 

I booked my car in at a local reputable independent garage.  They tried another sensor and the fault remained.  They told me they could try stripping the hub down and checking the ring but they really didn't think it would prove anything.  They advised me to take it to a dealer.

 

Has anybody any ideas?  Because of how it failed I suspect a poor connection but it is fine at the sensor end..

 

Thanks.

Check the ring, failure is common.

Jack up the offending wheel, put on full lock, you can now see the shiny reluctor ring, rotate the wheel slowly and clean with the cotton bud dipped in methylated spirit.

Db

Is it just me, but I'm thinking wiring fault?

 

This is the site info I used to try and help diagnose my issues.

It has no "ring" as such just small magnetic bars moulded into the bearing seal.It may be a wiring problem or a wheelbearing problem

Sorry for the late reply.  It was the bearing in the end which I'd had replaced less than a year ago, not because of an ABS fault but because it was noisy and there was play in it.  They did it free of charge.

Correct it dosent have a ring it has a magnetic bearing, my bet is bearing is starting to come out of hub.

www.youtube.com/watch?v=YtU4koy-iUc

That vid will explain a lot if they did it with a press it wont last long.