E90 2006 320d won't start

Discussion in '3 Series' started by Jay320dm, Nov 9, 2018.

  1. Jay320dm
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    Jay320dm

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    Parked the car up on Tuesday night come out on Wednesday morning and it wouldn't start. No previous issue with non starting. When I first put the key in and hit start button it was like a half second crank after pushing the start a few times it started cranking normally. Just cranking and no start. Transmission red light also on.

    Bought a new battery and after fitting it still cranking no start. Only real fault code being stored is a0b3 starter terminal 50. The fuel pump is priming and have loosened the injector pipe where diesel flowed out so it is getting fuel. Ecu box checked and its dry no corrosion around plugs. All fuses tested and working.

    Any ideas or help would be much appreciated. Thanks in advance
     
  2. Tombo
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    Tombo

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    Check all fuses as first.
    What diag software have you used to read errors?
    Normally after flat battery you should have ews tampering error with symptoms like that.
    If is not there's two other important things to check - engine blue rely and crankshaft sensor - them not throwing any errors
     
  3. Jay320dm
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    Jay320dm

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    All fuses have been checked and working.
    Using Delphi and wow, there was a lot of low voltage faults down to battery dying out. Battery only died out due to cranking.
    Blue relay has been checked as well and working I forgot to mention that.
    So that would leave me with crank sensor.
    I am borrowing a friend's launch diagnostic today
     
  4. Tombo
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    Tombo

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    Ok
    Make sure you have connection to DDE and CAS
    Let us know what errors there
     

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