Factory BX immobiliser by-pass button question
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Thread: Factory BX immobiliser by-pass button question

  1. #1
    Too many posts! JohnW's Avatar
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    Default Factory BX immobiliser by-pass button question

    Can anyone remember how the factory-fitted immobiliser system works?

    You can get a situation when the car is immobilised and won't go. I recall there is a button in the glovebox that you press while turning the key and then the system is reset and works properly.

    Is there a procedure, such as turning the key on and off a particular number of times, or do you just hold it and the car goes first time?

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    Cheers and thanks.
    JohnW

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  2. #2
    Fellow Frogger! FedGrapes's Avatar
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    Further more, what does the factory immobiliser immobilise? Is it spark, fuel, starter, or a combination?

    I think I know which BX is being spoken of!

  3. #3
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    Quote Originally Posted by FedGrapes View Post
    Further more, what does the factory immobiliser immobilise? Is it spark, fuel, starter, or a combination?

    I think I know which BX is being spoken of!
    In my experience it immobilises the starter, but maybe other things too!
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  4. #4
    1000+ Posts Ken W's Avatar
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    You have the procedure correct. You hold the button in the glovebox on and then turn on the ignition and the motor should turn and start. If it is not disabled, I seem to remember that eveything looks OK until you try to start, then everything goes dead on the dash - but it might do this when the engine is cranking anyway - its just more obvious when there is no cranking noise.

    Hope you sort it soon.

    Cheers,

    Ken W
    FedGrapes likes this.

  5. #5
    Fellow Frogger! FedGrapes's Avatar
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    I think I've solved the problem guys. I'm going to buy a new starter.

    I took a direct feed from the starter solenoid, and connected it to the battery. Nothing. That takes everything out of the equation except the starter itself, so it's time for one with a new solenoid!

    Ken W, according to the wiring diagrams, the dash doesn't get power when the key is switched to the start position. The ignition system retain power, and the starter gets powered.

    I've got to find that button in any case!

  6. #6
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    Quote Originally Posted by Ken W View Post
    You have the procedure correct. You hold the button in the glovebox on and then turn on the ignition and the motor should turn and start. If it is not disabled, I seem to remember that eveything looks OK until you try to start, then everything goes dead on the dash - but it might do this when the engine is cranking anyway - its just more obvious when there is no cranking noise.

    Hope you sort it soon.

    Cheers,

    Ken W
    Many thanks Ken. The only time I've needed it, the switch was there, as far as I can recall. Last time I looked for the switch out of interest, I could only find a small socket in the glove box, so presumed the wee plastic button had fallen out and had been lost to history. FedGrapes now owns the car - the switch would have to be at the end of the only wires going to the glove box apart from the light.

    Cheers

    John
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  7. #7
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    In my car it would crank over but not have any spark and I never could find the button.

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    Quote Originally Posted by Erikbm View Post
    In my car it would crank over but not have any spark and I never could find the button.
    On our 16v the override switch was not in the glovebox - not sure if it's appropriate to reveal where it was located on a public forum though . . .

    Cheers
    Chris
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  9. #9
    Real cars have hydraulics DoubleChevron's Avatar
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    pretty sure it was behind the glovebox in our old BX ... Strongly suggest removal and throwing away. You don't want the damn thing stranding you somehwere
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