ABS warning light tomfoolery!

[richyrooney]

Hello again think tank!......Had trouble with my abs light coming on when i bought my car a couple of months ago but seemed to cure itself and went out and has stayed out....until this morning when the b*stard has come back on again.Plan to manually check the sensors with a multi-meter this weekend but in the mean time just had a question?When i turn on the ignition and start the car the ABS light comes on and then as usual goes out after a couple of seconds and stays out until i get to around about 15-20mph when it comes on, does this mean it is definately a wheel sensor? or could it be the deadly expensive pump? Would have thought pump fault would make light stay on all the time?.....any advice as always is greatly appreciated cheers!

[DazVR6]

Nope a pump fualt can cause the ABS light to come on intermitantly, i had this with mine but in the end had to change the pump and a rear sensor-that sorted it once and for all God willing. Cost me £160 for a second hand pump supply+fitting at Midland VW.

[bulk66]

Just had to have a ABS sensor on the VR and the light stayed on all the time ... Cost £50 quid in total with labour....

[richyrooney]

cheers guys will test sensors for resistance and AC current generation with my borrowed multimeter this weekend and let you know.Just  hope its a sensor as i would rather change all four than have to cough up for the "demon" pump unit!

[boneybradley]

Could be worth getting the codes read and erased.... as any old codes will be stored until either the ecu is reset or the codes cleared.

[richyrooney]

Can you reset the ABS ECU in the same way as the engine ECU by disconnecting the battery?