My saff has been for its first mot since restoring it. It failed on the ABS light, which is constantly on. I have tried a different ABS ecu but this made no difference. The light never goes out.

It also failed on horn not working and washer jets not working, both because i forgot to connect them up

Does anyone know how to diagnose the abs lights???

Also, i got him to check the C0 level and it was 0.14 % at idle. Now he said this was dangerously low. We tried to turn the adjustment screw on the ecu (standard L6) but it made no difference. I gave it 2-3 full turns and nothing changed. The funnny this is, I took the engine out of another car, and the MOT certificate for that one stated exactly the same C0 %. Could this be a knackered ecu?? ( i have removed the cover and the adjustment screw is turning the resistor thingy.

 

don't know how to diagnose it but i do know a lot who have just removed the bulb

 

Yep, if i cant find a solution, that will be what im doing.

Anyone have any ideas about the mixture settings??

 

I would suspect the wheel sensors, they usually require cleaning but there are other causes as well.

Doubt it's the ECU assuming you have used this as well as the engine from another car?

It's more likely to be the chip.

Martin

 

if its permanently on, like mine was then its likely the abs ecu is not getting power - i simply run a wire from the back of the clock to the pin on the ecu (think its pin 19 from memory) and it goes on and off as the MOT man wants

 

I have put a known standard chip in the ecu tonight. Is there a way to 'zero' the mixture screw?? I have heard that you turn it 4 complete turns in one direction and the two full turns in the opposite direction. Does anyone know if this is correct??

 

cant just take the bulb out it has to come on and go off for the mot

 

check the sensors and the abs servos conections under the bonnet

 

Update:

I have tested all four sensors with a multimeter and im getting around 1024ohms on all four. I was told that these readings would suggest the sensors are ok. I have tried another reservoir cap incase it was the level sensor but still no joy. Does anyone know if you can get the abs ecu to output a fault code etc to point me in the direction of the fault??

Thanks

 

Sensors seem fine, so try the connections between them and the ecu. Can you check the resistance elsewhere...?

Tom

 

Just been out for another ponder over the engine bay. Some things are starting to make a bit of sense to me now. Before I bought the car, it had been used as a track car. Now I have been reading about the abs system on bluecossie and apparently pre june 1989 cars were supposed to have an orange relay in the fuse box in relay number VII ?? just checked and mines missing. mines a nov 1988 car. If its been used as a track car, im assuming this could be my problem and that a previous owners has somehow disabled the abs system.

does this sound feasible and would the missing relay cause my symptoms??

 

yes that sounds quite possible, especially if it's an ex track car, there is another thread on here where someone has disabled the ABS and had a diagram of the wiring he used so the lights still work, I will locate it for you. There are also relay(s) and a 30A fuse behind the passenger dash (Certainly on the post June 1989 cars, can't say for earlier models)

Btw the bluecossie website host is a member on here (Cozmeiser)

Martin

 

Thanks mate

 

when you restored it did you have the hubs powder coated or painted?as where the abs sensors bolt on it must be bare metal as even a thin skin of paint or rust or powder coat will cause this.

 

Here we go:



That is if the relay is your problem, if it were me personally I would just be replacing the relay to restore the ABS, job jobbed then and legal!

Martin

 

Hi, yes i did have them powder coated, but I left the bolts in the hubs so that the powder coating wouldnt block the treads.