2002 E46 316ti Compact Fuel relay broken wire

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Thread: 2002 E46 316ti Compact Fuel relay broken wire

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  1. 2002 E46 316ti Compact Fuel relay broken wire 
    #1
    Bimmer Fan
    Car Details
    flexiva's Car Details
    Model of Car:
    316SE Compact
    Year of Manufacture:
    2002
    Transmission Type:
    manual
    Car Body Type:
    compact

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    Going staright to the point, car lost power while driving and refused to start. Had it towed to my local garage and for almost two weeks the car isn't fixed. It appeared its a fuel relay issue but my mechanic has confirmed fuel relay and fuel pump works but there appears to be a broken wire that links the two together. He has been testing the wires to find which one is broken all this time and still hasn't found which one. Can someone please help maybe I can tell him where to look or is there anything else that can be done. This is really distressing as I only bought the car two weeks before problem. Any help will be appreciated. Thanks
    Last edited by flexiva; 18-03-2010 at 09:30. Reason: Fixed.
     
     

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    #2
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    The fuel pump itself is controlled by the DME using the relay. Has he verified the signal from the DME is not intermittent?
     
     

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    flexiva (16-03-2010)

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    Dr of BMW gildersol's Avatar
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    Does he mean that the relay is operating while fitted to the car, but the pump is getting no power?
    The +ve to the relay coil is from fuse F3 in the engine electronics box and the -ve trigger for the coil comes from the DME as NeilP says.
    The relay contact supply comes from fuse F54 in the glovebox and when the relay energises, the supply is switched onto the pump via the white/blue wire from the relay.
    Check the fuses first.
    There's also a DME relay which is energised by the DME. The relay then switches +ve to the fuse F3 in the electronics box.

    A bit long winded I know
     
     

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    flexiva (16-03-2010)

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    #4
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    flexiva's Car Details
    Model of Car:
    316SE Compact
    Year of Manufacture:
    2002
    Transmission Type:
    manual
    Car Body Type:
    compact

    Join Date
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    Location
    london
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    He says the relay is working and the pump is getting no power so suspects a broken wire somewhere.
    Thanks guys for the reply I will send this to him immediately.
     
     

  9.  
    #5
    Bimmer Fan
    Car Details
    flexiva's Car Details
    Model of Car:
    316SE Compact
    Year of Manufacture:
    2002
    Transmission Type:
    manual
    Car Body Type:
    compact

    Join Date
    Mar 2010
    Location
    london
    Posts
    3
    Thanks
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    Car now fixed, dodgy wire and damaged fuel pump. Also had the wishbones changed. So out of pocket.
     
     

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