Question about 1994 Mercedes-Benz C-Class

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I have a Nissan Almera diesel 2,2 liter engine, year 2000. It stopped running just like that, without any pre-announcement. I could not start it (It swings but the engine does not start). The launch X431 gave me the folowing fault codes: 1. P1600 P3-pump comm line. 2. P1690 P5-pump c/module 3. P1251 P4-SPILL/V CIRC I erased the fault memory, but the engine still does not start. Now the only falt code shown is the last one (P1251 P4-SPILL/V CIRC), and I do not know what it is!? How bad is that? Can anyone help me? thanks a lot.

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  • Alex Jarema
    Alex Jarema May 11, 2010

    I am not sure but maybe this will help.
    The ECM and the electronic control fuel injection pump control unit
    (abbreviated as the injection pump control unit) perform the real
    time communication (signal exchange).
    The ECM transmits the signals of the target fuel injection amount,
    target fuel injection timing, and engine speed, etc., and receives
    the
    signals of the pump speed and fuel temperature, etc. from the
    injection pump control unit.
    By those signals, the injection pump controls the optimum fuel
    injection amount and injection timing of the spill valve and timing
    control valve.
    Injection pump control unit has an on board diagnostic system,
    which detects malfunctions related to sensors or actuators
    built-into
    electronic control fuel injection pump. These malfunction
    informa-tion
    are transferred through the line (circuit) from injection pump
    control unit to ECM.

  • yadayada
    yadayada May 11, 2010

    Since this is not sold in the USA we have no tech info on the codes here, good luck.

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Solution #1 is not correct.. reason, why engine does not start when those codes are shown, is pump control unit (PCU), or electromagnetic valve. You should give PCU to fix (mostly it's broken transistor inside) or to change you current PCU to the new (need to be programed) or buy whole new VP44 PSG5 pump.
Sorry for my broken language :)

Posted on Nov 23, 2009

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The Guy With The 2.2 Almera None Start Problem Did He Find The Fault In The End And What Was It Cheers

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My Nissan 2004 caravan mini van stopped driving and cannot start What could be the problem? Thanks

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I can not remember what your fault code is. Being a diesel engine, check that you are geting fuel to your injectors by slackening of the injector head to see the fuel coming out as someone turns over the engine. If this is ok, then check your heater plugs (glow plugs) and your heater plug relay. If all these are ok your engine should fire up.

Posted on Nov 29, 2008

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