Just thought I would pass this information on. I was talking to Richard Welch over at autosportwiring.com and he said that he can make an ecu patch harness that can be used to splice an emanage into for the Maxima. The patch harness would cost $148 shipped. The only thing is he said he can only do it for those with the Type N3-a ecu. I thnik that this means this will only work for 1995-1999 Maximas and he seems to think some 2000s as well. Here is the diagram he sent me.



Hope this helps some of you.

 

That would be awsome. Surely worth the money, especially when you consider how much work is required to build your own, sourcing the parts, etc. Any ETA?

 

Also, just to note, the wiring is not the same from 95-99, connector wiring varies depending on emissions equipment.

 

If you email him he will make it up for you. I am not sure what you are looking at concerning time. I wanted to get it done, but I have a 2000 GLE. If anyone is interested you can contact autosport wiring through their website. By the way, does anyone know what ECU Nissan used on the 2000 GLE?

 

What's his source of info? If he's using electronic versions of the FSM's, I guarantee that if he makes a '99 harness, it will have mistakes...

Case in point, my 99 FSM says one thing, and the wiring is another. I determined this by doing numerious continuity tests....

 

Very good find. boomslang.us wanted to charge me $250 for a harness....Again very good find. I will be ordering mine soon...

 

I'm not sure where he is getting his info. I contacted him and he replied that Nissan used 3 different ecu setups on the Maxima in 2000, which I thought was a little strange, and said that he could make a harness for the Type 3-a but not the other two. I really want to have one made for my car, but he can't otherwise I would have got it done and then told everyone about the experience and give you guys some feedback.

 

I wonder if I could just pay them to do all the soldering for me...

Actually, I should probably just send hacim105 a PM....

 

Yea, I contacted boomslang and he said he couldn't do anything for me becuase I have a 2000. Seems to be the answer I get everywhere that I ask.

 

What exactly does that mean a patch harness? I only ask because this diagram doesn't match the 95-99 ECU's or the 00-01 ECU's layout. This is an ECU diagram for a completely different car.

 

IMO Nissan took a step backwards when they selected the ECU connector for the A33. (00-03)
It is considerably more effort to install/remove terminals in one these connectors than it is for the A32 or A34/Z33. I doubt very much you will ever get a harness fabricator to mass produce something for these vehicles.

Here is an excerpt from an email Richard Welch (Autosport wiring) sent to me back in January.

"Is this what you need for the 02/03 Maxima?



111 positions

If so, ... My notes concerning these parts state that they are restricted by Nissan and are not available to order/purchase. That may have changed since I made that note, but even if it did, the minimum order for this set of parts would end up being 3-5 thousand pieces. In addition these parts are more tedious and time consuming to work with. Combine those factors with these particular Nissan vehicles and it's not something I can expand into at this time. ( I just checked again. This manufacture currently shows 0 availability for these parts.)"

 

What he means by a patch harness is a harness that is more or less a sub harness or a harness that plugs in between your ECU and wiring so that you can wire in an emanage or something similar and then just plug the harness into your ecu. This allows you to wire in your emanage outside the car. I hope I am explaining this clearly. Keep in mind I only posted this to see what people had to say and get some feedback. Hacim if you could make a harness like this for my 2000 GLE that would be great as well. It just makes it easier to install an emanage or anything like it.

 

PM sent.

 

This is the reply I got back:

Hi Matt, Thank you for your inquiry. I may have had a set or two of those particular ecu connectors at one time,but if I did they are long gone. We carry several different Nissan ecuconnector types which are not listed on the website, but unfortunately the1998 Maxima is not one that I can help you with. Sorry I couldn't help with your request.Regards, Richard WelchAutoSport Wiring

 

sorry for bringing up an old thread....i just didn't want to start a new one if this one is here.... i searched


ok so what happened with this? does this mean that we can't have a patch harness or we just have to get one special made? i've got a 97 and will be installing a eu....

 

Yea, he cannot do it he said. Too much effort involved for such a small market.

 

Only fsm error I ran into when making a patch harness for a '99 was the cam or crank sensor that is listed in Dandymax's write-up, but even that technically isn't wrong because the FSM lists 2-locations for it and one is the right one. It says something along the lines of cam sensor = 46/44

Damn, to bad this won't work out, I payed $180 just to have a bundle of wires attached to the female connector, then spent 40 hours (YES 40 hours!!) Making diagrams, labeling wires, making connections etc. Patch harness really isn't worth the trouble, if I was to do it again I would do it like ViperVadim & use bullet connectors & make sure to use 1 male and 1 female on each in/out on the car harness, that way if you need to remove the piggyback you can just connect some bullet connectors and be on your merry way.

 

I wired mine to computer D-sub connectors. Took a while getting everything into the pins and connector bodies, but I can pull my EU anytime I like and have the car running in 30 seconds.

 

I spent hours checking and crosschecking the wiring diagrams. There are quit a few mistakes. I even scanned and emailed the pics to DandyMax. He agreed that were quit a few mistakes and to just do continuity tests to make sure on several connections.

I believe I was the first to put an EU into a 99...where do you think the info for the crank sensor came from?

As for the male/female bullet connections, I agree. That was the approach I took. A few guys critiqued my choice and insisted that soldering is the only way to go or a patch harness to avoid issues....but years later, no issues.

 

I just swap out two connectors and I'm ready to go

 

Ah so I see someone else decided to go the D-sub route!

 

Great job Matt. You're one of the few that pulled off the patch harness....quit a few have tried and failed.

 

Thanks James. It wasn't too hard, just tedious. Check, check, check, and check again was the name of the game. I hate electrical.

 

Any close up pictures of the connectors and/or connections, Matt?

 

Did I miss something? I don't see a patch harness in his pic...

The D-subs aren't a patch harness... they just replace all of the Greddy bullet connectors with WAY fewer connectors... but they're not patching across all of the ECU wires...

There's a picture of the D-subs in my EU writeup.. they're the same style connectors as a serial port on a computer.

 

I'll have to check my home computer, otherwise I can snap some for ya.

 

Thanks. Just trying to get a better idea of what was used, because I know there's all these different sizes of d-subs - DA, DB, DC, etc. How did you determine which ones were grouped together? By proximity or by intercept vs. tap? Sorry if this is obvious, I suck at wiring, the common sense concepts just elude me, that's why.

I'll look in Dandy's thread too.

 

I have to give Dandy credit for the idea, but I also found this helpful for the connector portion: http://forums.nasioc.com/forums/show...php?p=22574140

I have a Fry's electronics about 2 minutes away from work, so I made several trips just to look at the different connectors they had. I ended up using a DB25 and a DB15. I suck at soldering, so I used the crimp style pins, and went and bought the special criming tool for them to make sure I had a solid connection. Part of the crimping goes around and cuts into the wire insulation, so it would be very difficult to pull it back out, and I have had no issues.

For organization, I first made up labels for everything, then labled every single wire. Then I made a pin chart, and organized how I was going to wire up the connectors based on function, grouping together things like injector in, injector out, ignition in, and ignition out, power, ground, etc. The key thing is to take your time, and document everything.

Once I had the emanage harness done, I did the ECM harness on the car. You have to remember that everything is backwards, and triple check your wiring and diagrams. Once I had the car done, I fired it up the car to make sure that wiring was good, before I ever connected the EU.

I'll check on those pictures for you as soon as I have a chance.

 

I am making one now just started yesterday!! here is a pic I took.. takes very long time.. kinda a pain in the butt but worth it.. I am buliding mine so i can put my ecm in the glove box and then when i do go emanage in the future it will be soo much easier..


<a href="http://s76.photobucket.com/albums/j13/turbobird1989/?action=view&current=ecmharness.jpg" target="_blank"><img src="http://i76.photobucket.com/albums/j13/turbobird1989/ecmharness.jpg" border="0" alt="Photobucket"></a>

 

http://i76.photobucket.com/albums/j1...ecmharness.jpg

 

Thinking I have to go true all this, almost make me lol

I have contacted a local org member to see if he can come and help me advanced the project, otherwise I think it will be hard to drive my car this summer.

 

Hey everyone I got my extend harness finsh and in the future I will use it to tap my emanage.. I still have to install my ecm into the glove box but here are some pics of the finshed harness. and I test drove the car with it on works great.. also tested every wire to make sure it was in the right place.. when I got done with the heat shrink I used liquid black tape on it .. let me know what you guys think.

http://i76.photobucket.com/albums/j1...989/img313.jpg

http://i76.photobucket.com/albums/j1...989/img312.jpg

http://i76.photobucket.com/albums/j1...989/img311.jpg

 

Good stuff, I'm going to have to do something similar for my 2k1.

Do you have a 2k-2k1 or 2k2 + ?

 

1996 max lol

 

NICE!!! I want one!

 

I was thinking about make a few and selling them.. so if you are serious I could do another just is ver labor intense to do and cost some money because you have to destroy a ecm and harness to make..

 

How much do you think it will come to ?

 

I would like to get 225 shiped if I was going to do another one just becuase like i said I have to destroy a ecm and what not.... so if you want one let me know.. I will make another one up test it and then take some pics.. if you like you can pay me.. if not i am sure ill sell it to someone.. lol but as of now my ecm is in my glove box..haha

 

ohhh and it would take me about a week or so to do..

 

If I undersand correctly this will allow me to plug the EU directly to the piggy back of my 5th 2k1 ECU. If so I'm interested.