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Thread: Wiring diagram for VR4 coil pack setup

  1. #1
    adaxo's Avatar

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    Wiring diagram for VR4 coil pack setup

    Looking for wiring diagram with vr4 coils setup, galant diagrams are useless as they running on dizzy cap, can anyone point me in the right direction pretty please
    His FL Legnum VR4 running 238.8 ATW HP and 500Nm @1.05 bar on LPG
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    PDF16 of the Jap manuals https://www.clubvr4.com/forum/showth...p-Manual-PDF-s

    Page 13

    I thought it might be in the russian manual but the entire ignition section is missing
    best i can offer sorry. With the pinout of the plug, compare to the 4G COP setup in the EU manuals, get wire colours and firing order, track back to ecu.
    Last edited by Amonlym; 27-07-2021 at 07:37 PM.

  3. #3
    adaxo's Avatar

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    Thanks Jake, I find out what Im after by opening my spare loom, after my COP loom spectacular failure, with lots of smoke, tape used (Self-Amalgamating Rubber Tape) cant cope with heat and just turn in liquid rubber and shorten cables, lucky enough i was stationery but brown pants moment for sure, so im looking to redo it whole but from the source to have as little connections as possible, here are my findings
    Power to coils come from ecu on 1 wire(Black/white) pin12 con4

    217467583_977523562983769_4930225090640814201_n.jpg

    To IFS pin 4

    217583479_240904047713411_4150710151074541904_n.jpg

    then black/white) pin 3 from IFS goin back to firewall and its split to 3 separate wires going BACK to coilpacks

    219696786_361435248847047_5710338181732501851_n.jpg

    All 3 GND wires meet there

    217874328_417230566253367_1681236557798799282_n.jpg

    Now need to rethink how to simply it to make as little connections as possible to lower risk of failure, seem like 3 power wires are actually one wire comes from IFS, same with GND so that's potential of elimination of 4 connections
    Signals obviously comes straight from ECU so they must stay as they are.
    Last edited by Humpty's Revenge; 28-07-2021 at 07:47 PM.

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    Sorry dont have a scanner handy - but here's diagram you're after
    Attached Images Attached Images

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    Hey bill @BCX what is the number of the document for the VR4 wiring diagram?

    i could do with one of those if i have the number i can look out for one of those on the PDF manual website.

    Bye for Now!

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    I'm hoping to scan this document in once I can head into work, have been working from home cos of covid.

    If i do, will upload it.

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    that would be great.
    but do you the doc number for reference.

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    Quote Originally Posted by Davezj View Post
    that would be great.
    but do you the doc number for reference.
    I've got 1038S74 & 1038S75
    Last edited by BCX; 04-08-2021 at 12:04 AM.

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    Thanks Bil,
    i seem to saying this a lot recently.

    reputation points coming your way

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    No problems, I just wish I had more time to dedicate to my VR4 and the community.

    Lots of projects, so little time!

  11. #11
    Davezj's Avatar

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    Quick question for you on the def files.
    and just to confirm, the romid section at the top of the def files, if i am using a 7202 ecu i have to change all the memmodel lines to H8539F from the H8539FA (for 7203 ecu).

    i did notice you have the VR4base def file has memmodel set to h8359af which will probably stop it from working.

    am i right in thinking this.

    i have a 7202 ECU with auto box and i would like to include the VR4_ AT_ base.xml

    so as i see it, the EMKS11.xml calls the 20030010.xml which in turn calls the VR4Base.xml
    so if i want to use the VR4_AT_base.xml i need to add a line to say <include>vr4_AT_base</include> in the vr4Base.xml to call the VR4_AT-Base.xml from the VR4base.xml.

    i know this is the very basic stuff of def file manipulation, i just want to confirm i am doing it right?

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    Quote Originally Posted by Davezj View Post
    Quick question for you on the def files.
    and just to confirm, the romid section at the top of the def files, if i am using a 7202 ecu i have to change all the memmodel lines to H8539F from the H8539FA (for 7203 ecu).

    i did notice you have the VR4base def file has memmodel set to h8359af which will probably stop it from working.

    am i right in thinking this.
    which ever 2003001x.xml (or EMKS11) that is matched to the internal id of the rom, thats really the one you need to change between h8539f and h8539fa - the vr4base.xml value is ignored/overwritten by the 2003001x.xml
    To be safe, you could change all xmls to be sure though.

    The other behaviour i've seen is, depending on which read template used to suck the rom off the ecu i think will then override whats in the XML.

    to confirm before reflashing/bricking your ecu, check under here:

    ss.PNG

    ultimately, if this isn't right, then you need to save rom, edit xmls and reopen.

    note: either read template for h8539f or h8539fa will read a 7202 or 7203. its when you are writing back that you have potential to brick your ecu. hence a visual inspection of the processor version is advised and then double check.

    Quote Originally Posted by Davezj View Post
    i have a 7202 ECU with auto box and i would like to include the VR4_ AT_ base.xml

    so as i see it, the EMKS11.xml calls the 20030010.xml which in turn calls the VR4Base.xml
    so if i want to use the VR4_AT_base.xml i need to add a line to say <include>vr4_AT_base</include> in the vr4Base.xml to call the VR4_AT-Base.xml from the VR4base.xml.

    i know this is the very basic stuff of def file manipulation, I just want to confirm I am doing it right?
    vr4_AT_Base.xml is used to open the ROM off the TCU (not ecu)
    to read the TCU rom, you'll need re-pin the reflash connector and move the pin over one. Your reflash connect on the vehicle side will have 2 wires - 1 reflashes the ECU (standard location when you buy the reflash connector), other one reflashes the TCU.

    once you've got the rom, provided ecuflash is pointing to folder that contains these definitions, then it should open up automatically.
    if it doesn't, upload the rom and I'll have a look.

    but the reason you cant just inherit vr4_at_base is cos TCU and ECU are different control units and run different code.

    Hope that makes sense?

    Later Mitsubishis that use the SuperH processors (Evo 7-GTA, Magna/Diamante) have both transmission and engine code on the same chip/rom/control unit (in superh world, usually see this as 256kb roms vs 512kb roms)
    Last edited by BCX; 04-08-2021 at 06:04 AM.

  13. #13
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    Thanks again Bill, you are a star.
    sorry i was being a muppet with respect to the VR4_AT_BASE.xml
    i am not sure why i got confused with the VR4_AT_base and the TCU i know they are separate control units and you have to swap the pins to read the TCU.
    just a muppet moment. LOL

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