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2010 Titan 5.6 Crank No Start

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This topic contains 9 replies, has 3 voices, and was last updated by Nightflyr * Richard Kirshy 3 months, 2 weeks ago.

  • Creator
    Topic
  • #955431
    the metal bison
    the metal bison
    Participant

    I noticed about 2 weeks ago the truck didn’t start right away. I thought nothing of it, and just cranked it again, and it started. A couple days later it did it again, only worse. Trying to get to work early in the morning, cranking and cranking, but it’s not starting! So I gave it one last hail mary and cranked it again and it actually started. So a few days ago, I came to the same weird problem again. Now it won’t start at all.
    I hit it with starter fluid. It acted like it was about to wake up, but still didn’t start. I checked for spark, and no spark either! I checked the schrader valve over the fuel rail and it was no pressure. So maybe it’s a relay?
    I see the relays, but I cannot, for the life of me, find any diagram saying what they are.

Viewing 9 replies - 1 through 9 (of 9 total)
  • Author
    Replies
  • #955445
    Dave Tidman
    Dave Tidman
    Participant

    You can find the FSMs for nissans here:

    #955454
    Nightflyr *
    Richard Kirshy
    Participant

    Could be a relay….
    Could be a faulty crank and / or cam sensor
    Or something else.
    Does the ECU have any codes stored?

    See if any of these help : https://www.google.com/search?source=univ&tbm=isch&q=2010+Titan+5.6+relay+location&client=firefox-b-1-d&sa=X&ved=2ahUKEwjF8eKSuMXpAhUnmHIEHTVMCNMQsAR6BAgHEAE&biw=1366&bih=693

    #955504
    the metal bison
    the metal bison
    Participant

    I see the other kind has the ECM and Starter relays identified but the one for mine doesn’t say. It does show me the ignition relay. But that’s all.
    And these things are very aggravating to even get out. For example, I can’t. I cannot get the damn relays out. Why would they design them that way

    #957470
    the metal bison
    the metal bison
    Participant

    Anyone know what relay or fuse controls the ignition coils?
    Also, my scan tool won’t communicate with the truck.

    #957471
    Nightflyr *
    Richard Kirshy
    Participant

    Are you saying the ECU isn’t functioning or your specific scan tool?
    You’ll need to confirm that your ECU is talking and listening.

    #957472
    the metal bison
    the metal bison
    Participant

    It’s not the scan tool. It’s the truck

    #957474
    Nightflyr *
    Richard Kirshy
    Participant

    So you have a dead ECU…..
    Might start with checking the fuses that power the ECU.
    From there you’ll need to check powers and ground at the ECU connector(s)
    If that all checks out good you’ll need to test the 5V ref voltage output from the ECU and to all the sensors to see if the 5V ref is open,shorted or just not present.

    #957475
    the metal bison
    the metal bison
    Participant

    The ecu relay, which is the ignition relay (I’ve found out) is working fine. I haven’t checked for the 5v reference yet

    #957494
    Nightflyr *
    Richard Kirshy
    Participant

    The ignition relay maybe functional but that doesn’t always translate to the ECU having power(s) and ground(s)
    which is why:
    checking the fuses that power the ECU
    check powers and ground at the ECU connector(s)
    test the 5V ref voltage output from the ECU and to all the sensors

Viewing 9 replies - 1 through 9 (of 9 total)

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