2000 E46 325ci - Abs pump responsible for lights: Asc, abs and brakes?

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  1. 2000 E46 325ci - Abs pump responsible for lights: Asc, abs and brakes? 
    #1
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    ***PROBLEM NOW SOLVED***

    IF YOU REPLACE A SPEED SENSOR - MAKE SURE THE COLOUR OF
    THE PLUG MATCHES YOUR ORIGINAL (EITHER GREY OR BLUE)

    ************************************************** ****


    Hi All,

    I bought my car about 2 years ago. It was in perfect running order. Then about a day or two later, I noticed three lights appear on the dashboard: The orange ASC (Anti Slip), the orange ABS, and the red Handbrake light.

    Upon connecting it to a diagnostic computer it indicated that the Rear Right ABS sensor was faulty.

    I replaced the part with a BOSCH item, but could not clear the code.

    I then replaced it again with a genuine BMW sensor.
    The error still could not be cleared.

    The lights are still on (constantly).

    I've been advised it could very well be the ABS PUMP.

    Does anyone know how to test if the ABS Pump is faulty?
    If it is faulty, what would you recommend - a cheap one of eBay, a rebuild, or buying a reconditioned one with a warranty?

    The ABS pump BTW from BMW is £1000+.

    ANY HELP FULLY APPRECIATED!!!!!

    Car Spec: 2000 e46 325ci
    Last edited by Sinnus; 22-11-2010 at 11:56.
     
     

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    You need to do a resistance check on the sensor but do it from the correct pins in the ABS ECU connection, if the resistance is too high or it has an open circuit you need to then test it at the sensor. This method is checking the sensor and the wiring....
    Check these first before writing of the ABS module. As the sensor code the only one stored in the fault memory?
     
     

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    Quote Originally Posted by steve23002 View Post
    You need to do a resistance check on the sensor but do it from the correct pins in the ABS ECU connection, if the resistance is too high or it has an open circuit you need to then test it at the sensor. This method is checking the sensor and the wiring....
    Check these first before writing of the ABS module. As the sensor code the only one stored in the fault memory?
    The correct pins?
    Any idea what the resistance should be from the pins?

    The sensor is the only error code coming up, that can't be cleared.
    All three lights stay illuminated constantly.
     
     

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    The ABS and ASC all work together and if there is an issue all the lights come on...
    The pin data will be on a wiring diagram which will tell you what pins in the connection to use. A garage with Auto data may be able to give you the info or you can try this site and see if there is a diagram for you vehicle http://www.bmw-planet.com/diagrams/release/en/index.htm
     
     

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    Great link, thanks for that.
    Flipping sensors are nothing but headache.
    I will try to get the ABS Pump tested...
     
     

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    If anyone else can offer further info - it'd be much appreciated.
    THANKS!
    Photo below
     
     

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    A quick update:

    I've bought a second hand ABS Pump unit for £80 and fitted it.

    But I can't clear the error codes still and the lights are still lit.

    We've tested for breaks in the wires but a current is flowing.

    It looks like it might have to go to a specialist...

    What a flipping headache........
     
     

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    Quote Originally Posted by Sinnus View Post
    A quick update:

    I've bought a second hand ABS Pump unit for £80 and fitted it.

    But I can't clear the error codes still and the lights are still lit.

    We've tested for breaks in the wires but a current is flowing.

    It looks like it might have to go to a specialist...

    What a flipping headache........
    Did you have to remove your module from your old pump or are you using the module that came with the replacement?
     
     

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    We've taken the 'whole' unit out, and replaced it with this other one (which is in working order)......



    Not the actual item, but here's a photo to illustrate the 'whole' unit.
     
     

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    Quote Originally Posted by Sinnus View Post
    We've taken the 'whole' unit out, and replaced it with this other one (which is in working order)......

    .....
    Have you read the codes since?

    And has it been coded?

    ASC Mk20.

    The difference between the ASC MK20 EI and ASC MK4G is in the way the hydraulics and control unit have been combined to form one unit.

    The hydraulic unit and the control unit can be replaced individually in case of repair! After replacing the control unit or the complete ABS/ASC unit, the new control unit must be encoded.

    If it's ASC Mk60 then it won't need coding.
     
     

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