PDC Faulure

Discussion in '5 Series' started by Gordon, Jan 2, 2020.

  1. Gordon
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    Gordon

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    My 09 e61 today decided that the PDC would give up.

    Select reverse, you get the warning message saying that there is no comunication, then the screen showing the car and pdc parameters but no input. green light flashing on PDC switch

    It has front and rear PDC.

    I have put my fault reader on it but it says that the module isn't there.

    It is there ! Iv had it out and looked at the board which looks fine, fuse 69 is good and I have 12v supply to the module.
    If a sensor was faulty, the scanner would still see the module, wouldn't it ??

    any help / info greatly appreciated.

    Gordon
     
  2. The_Master
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    The_Master Site Supporter

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    Hi,

    As the code reader cannot find the module it points to the fact that the module has failed or the bus connection is broken (unlikely if other modules are working)
    I assume form your post above you have located the PDC module in the boot and that you've eliminated the common issue with E61's of water ingress into the boot shorting out the modules?

    Thanks
     
  3. The_Master
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    The_Master Site Supporter

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    Last edited: Jan 2, 2020
  4. Gordon
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    Gordon

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    Thanks for the help.
    I had a really good look at the circuit board using a magnifying glass, and can see nothing wrong, so I started suspecting the code reader.

    As we have recently moved house all my diag tools are all over the place, but I managed to find an old laptop, reloaded it and put on INPA.

    Low and behold, the scanner was lying. INPA found it straight away. Cleared all the codes, reread it and it comes up with 9E 39.

    This I believe is front middle left.

    so now all I have to do is find a front PDC sensor in Ruby black !!

    Any suggestions ?

    Thank Gord.
     
  5. Gordon
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    Gordon

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    Last edited: Jan 15, 2020
  6. Jonnyg123
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    Jonnyg123 Site Supporter

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    I just posted this on another thread maybe helpful if it ever happens again


    A little tip if you don’t already know if you turn the sensors on put your ear to each one the faulty on will omit a clicking sound. Makes it easier to find the faulty one. (y)
     
  7. Silverbeemer525
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    Silverbeemer525 Site Supporter

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    The working ones should be clicking. Any not clicking will be the faulty one(s).
     
  8. markyboyt
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    markyboyt

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    The trouble is if the system defects a faulty sensor and throws a warning it quite often deactivates them then none of them click.
     
  9. Jonnyg123
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    Jonnyg123 Site Supporter

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    Ahh I was 50% then lol (y)
     
  10. Silverbeemer525
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    Silverbeemer525 Site Supporter

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    On my E39, when one failed the whole system stopped working, but the remaining sensors continued to click. That is how I identified the failed one. I never had any fail in almost 4 years of my F10 ownership, and, so far, have had none fail on my G30, so I cannot comment on whether none continue clicking on the newer cars. Tempting fate now though!
     
  11. slim_boy_fat
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    slim_boy_fat WARLORD Site Supporter

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    The nearside rear on my E60 would intermittently fail. Just before I ordered a replacement, it came back to life and has been fine since (I hope I haven't invoked the curse of the careless word :rolleyes:).

    They can be susceptible to water ingress which a clean and a spray with WD-40 sometimes fixes.
     
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