2004 E46 330d M Sport - reversing sensors

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  1. 2004 E46 330d M Sport - reversing sensors 
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    Hi, I have a problem that another member posted last year which he resolved but the link to the solution is missing. (backtoblack was member). When I place the car into reverse there is a long single beep, then nothing. I can reverse right up to the object and no sound. I have checked from the outside on each sensor whilst in ignition position 2 and there is a pulsing effect from each of the 4 sensors. It had been working perfectly until the other day and now just the above symptoms each time. Any help greatly appreciated
    Last edited by BMW Jules; 03-07-2009 at 10:30. Reason: grammer
     
     

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    Is this the thread? 2002 E46 Reversing Sensor
     
     

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    Yes, thats the thread. When you click on the reply from Boostist 'click here', it leads to no thread, but whatever he advised seems to have worked from what backtoblack replied.
     
     

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    Quote Originally Posted by BMW Jules View Post
    Yes, thats the thread. When you click on the reply from Boostist 'click here', it leads to no thread, but whatever he advised seems to have worked from what backtoblack replied.
    That's because it was a link to the forum rules . The OP must have posted in a different section or not titled the thread correctly. Personally, I would get the diagnostic codes read on your car to see if the fault lies with the PDC module
     
     

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    Martyn D.'s Car Details
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    You can check if a sensor has failed by doing the following:-
    turn on ignition but dont start car
    put car in reverse
    put your ear close to the sensor, 1 by 1
    they make a very quiet rapid clicking noise, if one is faulty you will not hear the rapid clicking
     
     

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    Have checked each sensor and they all make this noise or pulsing effect, so I feel the sensors are working but I feel that because it initially makes the one long beep as if your right up to something then stops and makes no further noise that maybe a sensor has got dirty or something and thinks that it is right up to something. Perhaps a jet wash or something might help. Is there a simple way to remove each sensor and make sure really clean and fitted in correct?
     
     

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    Your best bet will be getting the fault codes read for the PDC system, if none current then get the person to view the live data, then you can see/test the individual sensors and work out which is faulty
     
     

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