ssaunders 199 Posted March 28, 2013 Report Share Posted March 28, 2013 Hi all, while driving I can sometimes hear the abs pump kicking in, it also does it sometimes under light braking when not needed. Any suggestions? No CEL. The unit has been remanufactured as I was getting the abs light on constantly.CheersSteve Link to post Share on other sites
VR6Pete 1,455 Posted March 28, 2013 Report Share Posted March 28, 2013 Sounds like a faulty ABS sensor or ABS ring's..... VAG-COM / VCDS is what is needed to identify which wheel has the issue. I've seen rings become misshapen / corroded that causes the ABS to have a "moment" when its not expected, but could be a sensor too, also seen instances where the wheel bearings are on the way out that causes movement and results in the ABS kicking in. Link to post Share on other sites
ssaunders 199 Posted March 28, 2013 Author Report Share Posted March 28, 2013 Cheers Pete, to save me from digging through the vag com blocks do you know which ones measure wheel speed? CheersSteve Link to post Share on other sites
UnitedMotorsport 55 Posted March 28, 2013 Report Share Posted March 28, 2013 The CEL has no reason to come on. ABS is nothing to do with Engine.Do the brakes get applied when you are not pressing the brake pedal? Link to post Share on other sites
ssaunders 199 Posted March 29, 2013 Author Report Share Posted March 29, 2013 Hi, UM. No the brakes don't apply but you can here the pump 'pulsing'? Occasionally when it kicks in on braking (which it has) it restricts pedal travel etc and I am losing confidence in late braking 'just in case' it kicks in when I am not expecting it. I can only associate it with the new discs and pads I had fitted on the front 2 months ago (by competent mechanic) I know too much wheelspin (which never happens ;-) can light the ABS, and I know there is a recurring fault apparently with most VW ABS units 90's to early 2000's on all models as I had mine remanufactured here http://www.bba-reman.com/uk/Last year, so I hope is just a dirty ring (story of my life!)If its fixable great but as its a daily driver with children I don't want to take any chances, do you know what blocks I need to measure in vag-com for wheel speed? (Free download version)I thought if the light comes on a fault will be logged (maybe not CEL) but still logged and readable by vag com? Before I had controller rebuilt it used to throw an ABS light intermittently and fault was rear speed sensor left, even when testing ( swapping rear left to right under rear seat) it would still throw a rear left speed sensor fault. All help greatly appreciated.Thanks for reply.CheersSteve Link to post Share on other sites
daxmatt 0 Posted April 4, 2013 Report Share Posted April 4, 2013 I had this happen last year, if you can't get it scanned check your sensors thats exactly the same as mine was doing, just follow the wire back unplug it and put a multimeter on it and check the continuity if its not got it it's a dead sensor Link to post Share on other sites
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