4th gen abs issues

llocke · Post by **llocke** » Wed Jul 22, 2015 8:06 am

After reading many threads about pulling codes for the abs I have discovered that the fault lies with my o/s/r speed sensor.

I took some time to remove it and give the whole area and the sensor a good clean, my question is though will the light just go out when there is no longer a fault or is there a way to reset it on 4th gens?

I understand there is a procedure for this with 5th gens but that doesn't seem to work on my 4th.

I'm hoping this will solve the issue as i'm trying my hardest not to purchase a new sensor.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Wed Jul 22, 2015 8:11 am

Fault light will clear if you have fixed the fault. It doesn't 'latch' on permanently when it registers a fault, it self-tests every time it is switched on.

You can clear fault codes just by disconnecting the battery though, if you want to.

Have you resistance checked the rear sensor? I'll be very surprised if cleaning it makes any difference tbh, it's normally the flexibile cable going o/c.

llocke · Post by **llocke** » Wed Jul 22, 2015 8:18 am

Didn't think about the cable, will try actually testing it later with a multi-meter.

It's going back for a retest tomorrow so hopefully I can get it sorted today.

I'd just read on a few different forums that sometimes the sensor can be blocked by dirt etc so thought i'd try cleaning it.

Cheers