1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

97 Honda Civic LX b18b1 Swap, wiring problems

Discussion in 'ECU's, Electronics, and Tuning' started by Siconic, Dec 27, 2011.

  1. Siconic

    Siconic New Member

    Messages:
    8
    Likes Received:
    0
    Joined:
    Dec 27, 2011
    Ok, I have looked EVERYWHERE and found only minimal information, and non specific to what I am looking for. I have 3 main questions, and please feel free to elaborate on them as much as possible. A brief overview:

    Original Equipment: 97 Honda Accord LX 4 Door.

    Purchased parts: B18B1 (Japanese Version) with harness (looks modular and was on engine from the crate) and manual transmission. It also came with P75 ECU.

    1. I bought a 97 2 door Viciv EX harness. My is a 97 4 door. Will that matter?

    2. It is an automatic to manual conversion. The engine is installed, but none of the harnesses installed ON THE ENGINE fit into the existing harness. Does the harness that came installed on the engine need to be removed and replaced with the EX harness? Is that what is meant by Plug and Play?

    3. Upon inspecting the EX harness (in car ECU side) has 3 plugs, only one fits into the P75 ECU. Was I sold the wrong harness?

    Our biggest problem right now is the fact that this wiring is hanging us up. We already have the engine, transmission, hydraulic clutch, cables, fuel line, EVERYTHING is ready to go once this wiring issue is solved or explained. PLEASE HELP! I am so lost, an I have done my research.
     
  2. Dj211855

    Dj211855 New Member

    Messages:
    191
    Likes Received:
    0
    Joined:
    Aug 2, 2011
    Answers
    1. Any obd2 harness is one piece, if you have the ex harness from an obd2 ex civic used that.

    2. Again, if the harness you got is an obd2 harness from an ex use that, An obd1 ex harness will not work in your obd2 chassie.

    3. The p75 ecu I believe was use from 94+ ( someone can correct me) 92-95 is still obd1. From 96-98 is obd2a and 99+ is obd2b. Post some pics to further help you. I will try to find some pics here.
    Look here: obd2 p75 integra ecu - Honda-Tech

    Look here: obd1 pinout - Google Search
     
  3. Siconic

    Siconic New Member

    Messages:
    8
    Likes Received:
    0
    Joined:
    Dec 27, 2011
    It turns out that, according to this link http://www.ff-squad.com/tech/wiring/wiring.96-98.jpg I likely have the DC integra, which is a two piece design. So I guess a EX swap is in order. However, I am still in trouble because the Civic EX harness does not fit into the P75 ECU. It is supposed to be from a 97 civic EX, but only one of the connectors fits the ECU, the rest, I have no idea what to do with. Is there some sort of mod or harness conversion I am missing? I am sorry I cannot post pics, I do not have access to the car as I am posting for a friend.
     
  4. CAFROG

    CAFROG Honda Minion VIP

    Messages:
    4,411
    Likes Received:
    148
    Joined:
    Apr 5, 2009
    Location:
    NOR-CAL
    You need to read up on auto to manual conversions. There are lots of good threads on the subject

    The 97 Civic EX harness is fine as long as its a manual harness. Otherwise use the DX one you got now.

    You never stated what OBD the B18B swap is? And the ECU?
    For ease of installation, they both need to be OBD2A
     
  5. |Chaz|

    |Chaz| Well-Known Member VIP

    Messages:
    6,125
    Likes Received:
    253
    Joined:
    Jul 4, 2007
    Location:
    Washington
    Wait I'm confused, is he putting a B18 into his Accord?
     
  6. CAFROG

    CAFROG Honda Minion VIP

    Messages:
    4,411
    Likes Received:
    148
    Joined:
    Apr 5, 2009
    Location:
    NOR-CAL
    Oh crap.....I just now saw that. Not a smart swap in terms of difficulty and benefits.
     
  7. Siconic

    Siconic New Member

    Messages:
    8
    Likes Received:
    0
    Joined:
    Dec 27, 2011
    Everywhere I read it was supposed to be a straightforward and easy swap. We have everything installed, we are very hung up on wiring. Also, it is the Japanese version of the motor and OBD2 out of a 2001 Integra LS. ANY help would be appreciated. I can do the work, I am stuck on how to wire the harnesses.
     
  8. Siconic

    Siconic New Member

    Messages:
    8
    Likes Received:
    0
    Joined:
    Dec 27, 2011
    Oh, and yes it is a B18B1. Also, we are swapping the automatic for a manual. Everything is cut out, welded and installed. EVERYTHING. Only thing left is wiring and ECU.
     
  9. CAFROG

    CAFROG Honda Minion VIP

    Messages:
    4,411
    Likes Received:
    148
    Joined:
    Apr 5, 2009
    Location:
    NOR-CAL
    I am not sure but I wonder if JDM OBD2B ECU's have an immobilizer.

    Is this a Civic or an Accord? Title says Civic but first post says Accord
     
  10. Siconic

    Siconic New Member

    Messages:
    8
    Likes Received:
    0
    Joined:
    Dec 27, 2011
    Im sorry. I own an accord, but e are working on a civic.
     
  11. FLACOFOOL80

    FLACOFOOL80 Banned

    Messages:
    30
    Likes Received:
    0
    Joined:
    Apr 21, 2011
    may i add that if ur engine is for example: b18b1 then its not jdm, jdm would be b18b. ne # after the last letter is usdm, which means about 20 less hp.
     
  12. Dj211855

    Dj211855 New Member

    Messages:
    191
    Likes Received:
    0
    Joined:
    Aug 2, 2011
    the wedsite I given you for identifying your ecu should tell you if you need a jumper harness. Other then this, IDK...
     
Verification:
Draft saved Draft deleted

Share This Page