Question about Infiniti Q45

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My 1996 Inifiniti Q45 will not start. I replaced my battery and it is still not starting. What do I need to do?

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Check that the power reaches the ignition key switch. Next check that the ignition key is functional and powers the ECM when turned. Finally check that the starter is operational. If al are functional then something is wrong with the ECM and for that the codes must be read.
All this must be done by somebody that has some experience in car electrics, don't mess with them unless you know what you're doing or have a really big lot of cash around to fix what you are going to damage. 
Best would be to tow your car to a shop.

Posted on Aug 01, 2010

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  • c3tj2 Aug 01, 2010

    I have no power at, how would I know, if it's the ECM (which I don't know what that stands for)....I was told, I might have blown a fuse...what fuse would that be???

  • Azrael SRL Aug 01, 2010

    The only fuses that would cause such complete failure are the main ones , 1 and 2 of 40 amp on the fuse box. But those burn only if there's a massive short  - i guess you would have noticed a melting wire under the hood. It's more likely that you messed up the battery install - either the clamp aren't fully tightened or the ground wire is loose - or there's a failure in the ignition key wiring.
    ECM - engine command module = the brain of your car. Since you don't know basic stuff like that then you are not qualified to work on that car - take it to a shop, the bill for fixing it now will definitely be lower if you don't try to "fix" it yourself.

  • c3tj2 Aug 01, 2010

    Okay...I get the fuse...I did not see any melted wires...I'm a woman, and know a little basic "Auto 411"...prior to taking it to a machanic for the ECM, should I try changing the Alternator? Would you think it might solve the problem?...By-the-way, thank you for your knowledge, I am so greatful...

  • Azrael SRL Aug 01, 2010

    No, the alternator can't be the cause, it only charges the battery. The only thing that would make an alternator at fault here would be a short in it - But a short in the alternator would make the battery explode when you connect it - you would have noticed that.

    Honestly , i don't think you can fix it; even i couldn't fix it without my proper equipment. As i said above all you can do is to perform some basic checks with a voltmeter - that will give you some indication on the location of the fault. If when looking there you can't find some obvious faulty parts then it's time for some indepth testing - which should be the job of a well equipped pro.



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