Clearing ABS Faults using Vag-com Golf mk3 gti 16v

**Crasher** · 15-05-2008,04:37 PM

If it was as simple as that, VW would not sell both.

**Alpine** · 15-05-2008,06:26 PM

Originally Posted by Crasher

If it was as simple as that, VW would not sell both.

dang, thx for the help. Guess ill hunt down another one then..

**ASR81** · 08-09-2008,09:44 AM

Just seen this one... I had a faulty rear driver side abs sensor. However they replaced it and the same fault came up. Now no one can connect to the actual ECu. Can a faulty ABS ECU cause a problem where by no one can connect to the actual ECU?

**Crasher** · 08-09-2008,01:22 PM

If I get a post 95 Golf 3 with a right rear sensor failure, I swap the wires over under the back seat. If the fault is still right rear, I then know it is the ABS ECU and this is a very common problem.

**ASR81** · 08-09-2008,01:36 PM

Originally Posted by Crasher

If I get a post 95 Golf 3 with a right rear sensor failure, I swap the wires over under the back seat. If the fault is still right rear, I then know it is the ABS ECU and this is a very common problem.

Thanks Crasher. Is there any sure way way checking myself at home. I havent got a comp to read the codes. And the ABS slef check light doesnt even come up on starting the car at all.

Also, nobody can connect to my ECU. So not too sure what the best thing is to do. Should I change the ABS ECU first then start with the ECU? Does one control the other? Just wondering if because my ABS ECU isnt working, does this mean no one can connect to the main ECU.

Cheers

**Crasher** · 08-09-2008,01:43 PM

So you can’t communicate with the engine ECU either? The ABS ECU and pump are bolted together post 95, what is your car? On cars with faulty ABS, it is not ususual for people to disable the bulb.

**ASR81** · 08-09-2008,02:00 PM

I've checked the bulb and pretty sure thats not the problem because its been working okay previously (Have had the car for a few years now).

I have had the right rear abs sensor changed before and the light still stayed on. Reset the codes (This is when people could read the ECU), and the light went out. After a few miles it just came back on again. So I just drive around with the light on for a few weeks and then it just went out by itself. Being complacent I just left it thinking the problem had been solved. But now I'm thinking perhaps the problem with the ECU occured then?

I've got a '96 P reg, 16V ABF engine.

**Crasher** · 08-09-2008,03:50 PM

ECU failure is very common, sometimes it can be repaired but often we have to find a good used unit or fit a new one at around £500 if the customer can afford it. The system is known as a Teves ABS GI Mk IV and if you remove the pump/ECU a specialised bleeding routine is required to get the air out when bleeding it back up.

**ASR81** · 08-09-2008,03:55 PM

Cool, I got some quotes for a used ABS ECU for about £30. Do I need to remove both the pump and ECU together? From what you said, I'm guessing this is not a DIY job at home? So you reckon this ABS ECU would stop anyone communicating with the main ECU?

**Crasher** · 08-09-2008,03:58 PM

It is possible to do it without removing the pump but very awkward and the tiny outside Torx bolts can be evil little things to undo. You say the main ECU, do you mean the engine ECU?