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Thread: Nissan GA15DE ECU Wiring Help

  1. #1
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    Default Nissan GA15DE ECU Wiring Help

    Gosh.....I've made up a thread now.

    Salaam to all Pakwheelers.

    The matter began since I got my engine swapped from E series to GA series, i.e. GA15de.

    Matter got worse when it did not idle, and almost no help from the local electricians as in case of Nissan, most likely.

    Now, where I've hooked up my ECU quite rightly i.e. wired up the start signal, ECU relay, ignition, and start engine wires, still there are some issues, which needs to be addressed.

    1. Idle Air Control Valve - Auxiliary Air Control (IACV-ACC) Valve is not working. It has a 5 wire grip as shown below and the manual says that the third terminal of the wire grip must be emitting "battery voltage" i.e. 13 V and it is emitting only 0.1 V +/-. The continuity from the grip to the ECU is ok.

    2. The things related to the IACV valve i.e. Steering Wheel Pressure Switch, Air Conditioner, Rear Window Defogger, and Lighting Switch wires are also emitting no current, i.e. they should emit current, but they are showing the same voltage as IACV valve showing i.e. 0.1 V +/-.

    3. Electric Load Switch signal wire is also behaving the same. i.e. 0.1 V +/-.

    4. Air Conditioner Relay wire is also not emitting current also, i.e. it has to give battery voltage i.e. 11-14 V.

    Nissan GA15DE ECU Power Supply circuitry explained at Page 4 in detail.

    IACV-Valve Nissan GA15DE Explained at Page 4 in detail for Nissan GA15DE owners without it functioning.



    What is the problem ???

    I'm attaching a few pics, which might be of help.

    The ECU in Question:

    Nissan GA15DE ECU Wiring Help -348965


    Ok, here is the pic for an idea of the component I'm talking about.

    Nissan GA15DE ECU Wiring Help -348988

    This is the valve in the circle. it has a 5 wire grip infront of it.

    Nissan GA15DE ECU Wiring Help -348989

    This 113 Number wire from the ECU is not giving appropriate voltage. It is giving only 0.1 V. Although, I checked the resistance of the valve and it is okay.

    The respective four items are also not working, as above mentioned, which when should be on, increase the rpm by IACV valve.


    Nissan GA15DE ECU Wiring Help -348990


    This is the diagnostic procedure for IACV as mentioned in the manual. I did the procedure and am stuck with the procedure as mentioned in the Box in front of "B", saying Check the Following: Harness Connectors F4, M40, etc.....

    Nissan GA15DE ECU Wiring Help -348991

    success is the ability to go from one failure to the next without any loss of enthusiasm

  2. #121
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    Can we reset ECU????

  3. #122
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    Default

    just remove the battery for a while and it will reset the ECU

  4. #123
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    Thanks ... But how we know it will be reset. ??? WHAT will be the effects???

  5. #124
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    Default

    I want my cars fuel pump connected through ECU... PLEASE HELP ME????

  6. #125
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    Dear Star2 !
    I just installed GA15DE in place of GA14 in my sunny 98 and facing problem with ECU wirings. Can you please share the repair manual from which you have been posting the pics.
    Thanks

  7. #126
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    Hi All any one know the oil seal number of GA15 Distributor below pic is attached for your reference
    Nissan GA15DE ECU Wiring Help -1654727

  8. #127
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    @star2 Bro can I have your number, I swapped the same engine in my b12 have the same problems , You could maybe give me some pointers as to how to solve this coz no mechanic here knows ECU wiring for **** by here I mean Rawalpindi.... And Im no wiring wiz so Ive no idea about these diagrams so help me out kindly....

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