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[Vivaro] immobiliser issues

Discussion in 'Car Audio / Electrical / Security / Diagnostic Related' started by Mrh1981, Jan 11, 2017.

  1. Mrh1981

    Mrh1981 New Member

    Messages:
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    Drives:
    Vivaro
    Hi, just wondering if anybody has come across any issues I'm having, my 05 vivaro has developed what i think is an immobiliser issue, this started as an intermittent fault but now the immobiliser doesn't switch off, the immobiliser light stays solid red when the ignition is turned on. So far i have had a new key programmed, had the ecu and bcm sent away and tested.(they came back fine) once re fitted the same thing is happening.
    i have also tried an ecu, bcm, key and key reader of a known working van of the same make and model and the problem is still occurring. I have stripped the ecu casing out and checked the wiring local to it and the same with the wiring local to the bcm but there is nothing loose or obvious i can see.

    so could anything else be holding the immobiliser on? would a sensor of some description or a broken fuel pump some how not allow the immobiliser to switch off? or could this be a broken wire further in the wiring loom?

    and also can a key be programmed to just the central locking and not the immobiliser?

    any help would be much appreciated
     
  2. andyl

    andyl Well-Known Member

    Messages:
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    Location:
    bristol
    Drives:
    Astra J 1.4T sri, Astra H VXR Van .
    Have you checked the fuse to the immobiliser, FC12 10A, its in the fuse box in the end of the dash.
    Do you have 12V at Pin 3 Red wire of the immobiliser receiver, also check the Ground which is Pin 2 Black wire, the grounding point is on the driver side 'A' pillar, check the connection is clean and the wire has continuity, the Green wire in Pin 4 goes to the BCM plug, Pin 22, check it for continuity and resistance, it may be broken or shorting to ground.
     
  3. Mrh1981

    Mrh1981 New Member

    Messages:
    4
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    Drives:
    Vivaro
    Thanks for the reply, i have checked the fuse at the end of the dash but haven't checked anything else that you have suggested so ill get on with those checks in the morning. iv been struggling to source a wiring diagram and am new to the auto electric side of things. again thanks for the reply and I'll keep the thread informed of any progression
     
  4. Mrh1981

    Mrh1981 New Member

    Messages:
    4
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    0
    Drives:
    Vivaro
    just an update, the fault turned out to be a broken wire that was in the loom over the gear box, once this was jointed through the immobiliser started working as it should but the van seems to have delayed other problems that i was hoping you could help out with. It now turns over and when starts and fires up, only to immediately die again. any suggestions welcome

    thanks
     

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