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

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  1. 1997 E36 318is:Still can't get rid of this abs light ? 
    #1
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    Been to get it on the computer again and it's still showing the same fault n/s/f sensor!

    Now i've tested the sensor and the readings are correct and it's got a good earth. There's definately nothing wrong with the sensor.
    Anyone got any suggestions on what else could be the cause ?
    I've looked at the abs ring aswell and all the teeth are there/no rust on them e.t.c.

    It's driving me mad and it's only one month away from mot time so i really need to get to the bottom of it..

    appreciate any advise.
    Cheers
    Dave
     
     

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    When does the light come on? Immediately, or do you need to drive a few metres first?
     
     

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    Hi, I would suggest you take the N,S,F wheel of and check the positioning of the sensor wire on the brake caliper/Pad location if it's grubby give it a clean with some brake cleaner and check it's tight in the locating notch.
     
     

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    #4
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    Quote Originally Posted by TheEnd View Post
    When does the light come on? Immediately, or do you need to drive a few metres first?
    IT comes on straight away with the ignition and never goes off.

    Quote Originally Posted by Loco View Post
    Hi, I would suggest you take the N,S,F wheel of and check the positioning of the sensor wire on the brake caliper/Pad location if it's grubby give it a clean with some brake cleaner and check it's tight in the locating notch.
    The problem is with the ABS not the brake pad wear indicator...

    Thanks
    Dave
     
     

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    After reading This little guide on checking the wiring i had a dabble.
    So i've removed the wiring block from the abs pump unit and checked the pins advised in the above and here's what i get :

    NSF (pins 1&2): .968 --This is a brand new sensor btw--
    OSF (Pins 19&20): .980
    NSR (Pins 5&6): Nothing ? no reading at all!
    OSR(Pins 22&23): .980

    So the NSF is a little low. Enough to cause it to not work ???
    NSR ? Getting nothing at all from that one, but the computer never picked up on a fault back there though ?

    Damn this is annoying...

    Looking forward to some reply's

    Dave
     
     

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    How are the codes being read?
    I wonder if someone has a system that is making them look up the wrong fault definition.
     
     

  8. The Following User Says Thank You to TheEnd For This Useful Post:

    Truxx (25-10-2010)

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    Quote Originally Posted by TheEnd View Post
    How are the codes being read?
    I wonder if someone has a system that is making them look up the wrong fault definition.
    Both garages used the simple little ebay device ( similar to this : Link clicky...

    This has been two seperate garages though so it's unlikely that both machines are faulty ?
     
     

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    The problem is with the ABS not the brake pad wear indicator...

    Thanks
    Dave[/QUOTE]

    Just a suggestion mate, mine came on after I changed the brakes and forgot to set the ignition to positon 1 (for 20 secs i think to re-set) so they are linked in some way, then it went off again after switching the car off and on when I got home.
     
     

  11. The Following User Says Thank You to Loco For This Useful Post:

    Truxx (25-10-2010)

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    Quote Originally Posted by Loco View Post
    Just a suggestion mate, mine came on after I changed the brakes and forgot to set the ignition to positon 1 (for 20 secs i think to re-set) so they are linked in some way, then it went off again after switching the car off and on when I got home.
    Cheers anyway matey, i wasn't trying to be rude. I assumed you'd mis-read my post thinking i was meaning the pad indicator.
    I have by-passed both pad wear (dummy sensors) senors anyway.

    Just been out and removed the nsr wheel and checked the resistance at the abs plug and there's nothing! Exactly the way the nsf was before i replaced it so i'm now thinking it has to be the rear one? Could 2 different garages have read the codes wrong ? Seems highly unlikely, but something isn't right.

    Any other suggestions before i throw more money at it on another sensor ?
     
     

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    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.
     
     

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    Truxx (25-10-2010)

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