1997 E36 318is:Still can't get rid of this abs light ? - Page 2

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    #11
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    Quote Originally Posted by TheEnd View Post
    If you ignored computers, and did it the old fashioned way, you'd have no doubt it was the rear sensor.

    I would be tempted to ignore diagnostics, as there is more than enough evidence to say that they are wrong, and you are right.
    Well, i went back to the original garage and asked him what's going on and he didn't know! He said the computer can't possibly be wrong and insisted there was nothing wrong with the rear sensor

    So i've just been out and removed the rear sensor anyway. Just have to wait for the new one to arrive from ebay and see what happens.

    Thanks again Mr.End I'll update this with my findings.

    Dave
     
     

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    #12
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    It does seem unlikely, but your won testing, twice has shown the rear sensor to be the problem.

    When the light comes on immediately, it shows there is a static self check fault in the system, such as an open circuit sensor.
    If you needed to drive off a small distance for the light to come on, it would be a dynamic plausibility error, such as a damaged ABS ring.

    In other words, if the light comes on at the start, the problem tends to be electrical, if you need to move, it's more likely to be mechanical.

    I hope we are right in this case. I always try to avoid suggesting changing parts in hope as that is a gamble, but in this case, all old school methods are pointing to the rear sensor.
     
     

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    Truxx (26-10-2010)

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    #13
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    New rear sensor fitted ...Still no good!

    Not sure what else i can do really.
     
     

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    #14
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    Sorry about that.
    I hate wild goose chases, but it did seem likely.

    The final possibility looks like it might be from the ABS ecu or solenoid block.
    Although rare, the wheel sensors can share the same fault code as some of the valves for controlling the brakes.

    Have you done any multimeter checks since the new sensor was fitted?
    Getting the reading you did shouldn't have been right, but I'm surprised that wasn't the actual cause.
     
     

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    #15
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    You have nothing to be sorry for matey, you've been really helpfull

    I went to another diagnostic place today who used Bavarian tecnhic to read/clear the codes.
    Anyway, here's what he got :







    So there's a couple of abs faults. The front left has a dynamic fault (dodgy ebay sensors?) and the front right has a static fault. So the reason the light has been on constantly is because of the front right!

    I will not trust those seperate diagnostic machines ever again

    The air bag fault it picked up just said "ignition circuit 0 -->Driver airbag ?

    Thanks
    Dave
     
     

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