2003 E46 330D Sport - ABS warning lights on/reset(FIXED)

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  1. 2003 E46 330D Sport - ABS warning lights on/reset(FIXED) 
    #1
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    neverracedorrallied's Car Details
    Model of Car:
    E46 330D Sport
    Year of Manufacture:
    2003
    Transmission Type:
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    This started with an intermittent problem with the speedo, odo not working and the abs and dsc warning lights staying on, although not necessarily at the same time. It happened the first time in heavy rain but after a long period of motorway driving it cured itself and it all functioned correctly again. Then it rained again........

    My independent garage connected up to the diagnostic socket and diagnosed it as the nearside abs sensor, replaced it but were unable to reset and make the lights go out and the speedo and odo work. I did a battery disconnect for ten minutes but again to no avail. Now, there is nothing intermittent about it, not a flicker.

    Has anyone else experienced this please?

    I have owned the car from new, it has over 130k miles on it and is a truly wonderful motor car.
     
     

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    Hold the DSC button down for approx. 10 secs to reset the system traction system. Then single press on and off will toggle the traction which should switch the light on and off. If you cant' do this, then I would be looking at the ABS module next.
     
     

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    neverracedorrallied (15-05-2009)

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    #3
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    neverracedorrallied's Car Details
    Model of Car:
    E46 330D Sport
    Year of Manufacture:
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    Transmission Type:
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    Saloon

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    Thanks for your help. I have already tried a whole raft of resets, including that one, but to no avail.

    I am 90% certain that the original diagnosis was correct but am not sure why the replaced nearside ABS sensor was not the cure. It is a pain not having a speedo or odometer, and now the fuel gauge seems to waiver too, which it never has done before.
     
     

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    You sure they replaced the correct sensor? It might be worth having the codes read again.
     
     

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    neverracedorrallied's Car Details
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    Year of Manufacture:
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    Yes, and I know that the NS sensor controls the speedo, odo too. Remember that the symptoms have also changed too - now there is not even a flicker, whilst before it was replaced it was spasmodic, it would work for a few [dry] days, then not work whilst it was wet.
     
     

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    When you say NS sensor which one do you mean, front or rear. The reason I say this is that the rear speed sensors are the ones that are prone to bring up faults.
     
     

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    #7
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    neverracedorrallied's Car Details
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    Sorry yes NS REAR sensor
     
     

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    The other thing to check is condition of tyres, because different rolling diameters will confuse the ABS control unit and gives false interemittent readings. The speed of the vehicle is controlled by all 4 sensors which is monitored and calculated by the control unit and sent to the instrument cluster's IC. The other things to consider are the ABS relay, module and the pump itself.
     
     

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    #9
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    neverracedorrallied's Car Details
    Model of Car:
    E46 330D Sport
    Year of Manufacture:
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    Thanks again.

    The tyres are matched side to side, same age.

    I'm wondering if maybe the NSR wheel sensor fitted was faulty in some way, since it hasn't worked correctly since being fitted, and since the ABS refuses to reset with it there.
     
     

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    Not aftermarket was it?
     
     

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