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  • Jess created a new forum post in pscan.uk diagnostic tool forum
    Hello,
    2000 MGF with MEMS1.9
    Is there anyway to make the MEMS1.9 unit learn the immobilizer code from the 5AS alarm unit when the immobilizer is engaged using the PSCAN?
    It seems that the PSCAN will not allow the MEMS1.9 to ‘learn’ the immobilizer code from the 5AS with the immobilizer is engaged.
    Or is there a way to disengage the immobilizer to allow the code to be learned?
    Many thanks
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  • Unfortunately, not where the car is garaged. It is located in an underground garage in a block of flats. If the engine does not run by jumping the power directly from the inertia switch to the fuel pump (with an inline toggle switch in my jump wire so I can cut the power), I will arrange to tow it to someplace where I can run the pump with the fuel line disconnected.
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  • Thanks gloscs,
    I’ve replaced this too. What is odd is that when the pump pre-primes, the engine immediately starts with no effort and then stops after 3 seconds due to what seems to be an absence of fuel.
    Jess
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  • Hello David,
    That’s my next stop. If that all checks out, I am going to jump the power directly to the pump from the line into the inertia switch to see if the engine will then run continuously. If it does, there is something going on that is making the ECU instruct the fuel pump not to operate except for initial priming.
    Jess
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  • Jess thanked the user Roverlike in the forum post, Error code 152C Pretensioner circuit left High Resistance
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  • Roverlike,
    Thank you for your response. Replacing the four relay multi relay pack mounted on the engine management system to the left of the engine (when facing forward from the rear of the car) is the first thing that I did. That did not resolve the problem either.
    If the airbag fault system is not what is causing the engine not to run, I am beginning to suspect that it may be the engine ECU itself.

    David, I agree that it is a fuel issue. The engine consistently fires and runs for the three seconds whenever the engine ECU instructs the fuel pump to prime. But once the engine starts under these circumstances, it quits as if it is getting no fuel. The engine will not start and run when cranking the engine unless one gives enough time for the engine ECU to reset and instruct the fuel pump to prime the system again.

    I am more concerned about what is causing the engine not to run (that is, why no fuel is being delivered except when the ECU instructs the fuel pump to prime).
    After replacing the multi relay pack, I thought that it might be the crank sensor not sending a signal back to the engine ECU. But that has not resolved the issue either.

    Any other ideas? Would it be worth having the engine ECU checked? Again, PSCAN showed no error codes for the system. But that might not mean anything.
    Jess
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  • Roverlike,
    Thank you for your response. Replacing the four relay multi relay pack mounted on the engine management system to the left of the engine (when facing forward from the rear of the car) is the first thing that I did. That did not resolve the problem either.
    If the airbag fault system is not what is causing the engine not to run, I am beginning to suspect that it may be the engine ECU itself.

    David, I agree that it is a fuel issue. The engine consistently fires and runs for the three seconds whenever the engine ECU instructs the fuel pump to prime. But once the engine starts under these circumstances, it quits as if it is getting no fuel. The engine will not start and run when cranking the engine unless one gives enough time for the engine ECU to reset and instruct the fuel pump to prime the system again.

    I am more concerned about what is causing the engine not to run (that is, why no fuel is being delivered except when the ECU instructs the fuel pump to prime).
    After replacing the multi relay pack, I thought that it might be the crank sensor not sending a signal back to the engine ECU. But that has not resolved the issue either.

    Any other ideas? Would it be worth having the engine ECU checked? Again, PSCAN showed no error codes for the system. But that might not mean anything.
    Jess
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  • Jess created a new forum post in MGF/TF Pitstop
    Hello,
    Because of Covid, my 2000 MGF was garaged and inaccessible. The battery went flat. Four weeks ago, I replaced the battery. The fuel pump primed and the engine started immediately and ran for about 3 seconds before just stopping. It won’t start again unless one waits for the engine management ECU to reset and then allow the fuel pump to prime again. Then same thing, engine starts immediately and then stops after 3 seconds. This can be done repeatedly. I decided to replace the crank sensor. No resolution. If pump primes, engine starts immediately and then stops.
    I then used my PSCAN to check for any engine management errors. None with ignition on, but engine not running. No errors detected either when the engine ran for it’s three seconds. The crank sensor ‘synched’ like it should when engine ran briefly.
    No error codes for alarm system/immobiliser either. System is MEMS 1.9
    But for the Airbag system, I got the error code in the subject of this message. Foolishly, I did not bother to check whether the SRS warning light was staying illuminated. But I imagine that it was.

    Upshot - would this fault in the airbag system prevent the engine from running except for the three seconds when fuel pump ore-primes?
    And if so, where would this fault be located? Would it be the driver’s airbag (car is LHD German spec)? Or is there a fuse or relay that could be causing the excessive impedance?
    Any help would be most welcome.
    Frustrated in Vancouver, Canada
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