[mosk22rte]

This is an incredible offer Jeff. When mine is back on all fours, and I am tackling this issue, I'll be getting you those PDF's. My 4runner is a 1998, but the manual tranny is out of a 1998 Tacoma, does that create a headache for wiring? I have the 1998 manual ECU though.

By delete, you do mean just remove the pin connector from the plug or cut the wire right?

As long as you have the 1998 4Runner manual ECU, the source of the transmission doesn't matter -- I think the only manual trans wire is the reverse sensor, and that doesn't go through the ECU. I posted the pinouts for the 1998 4Runner, both 5VZE and 3RZ, at the top of this thread -- since I happen to have a 98 3RZ 4Runner (and the FSM for it), you sort of lucked out.

I have the resources for a couple more pinouts, which I may get to this afternoon or this evening. Might as well strike while the iron's hot, etc. I've got it down to about 30 minutes from start to finish, provided I have printouts of the ECU and ECT wiring diagrams.

As for deleting the unused wires: probably the first step would be to crack open a manual ECU and see if the affected pins are unused, or if they are attached to circuits. If they are unused, no harm in leaving them attached/as is. If they are wired up...I don't know. As Yotaoffroad27 pointed out, there shouldn't be any harm in leaving them connected. No CEL, no foul. No need to delete any wires unless/until the system throws a CEL.

My main motivation for doing this was to make sure there weren't going to be any conflicts on my own swap -- pins used for one function by one ECU and a different function by the other. Ironically, the only ECU swap that's indicates a conflict, at least on paper, is the one I will be using (2002 5VZE). I hope to get to the bottom of that pretty soon; hopefully, it's just a typo somewhere.

-Jeff

 

[mosk22rte]

Not all the 2003 3RZ engines were throttle by wire. My 2003 Extended cab 4WD 5sp has a good old cable operated 3RZ. I also don't have cruise control, so that might be the difference.

I had heard that there was a transition/overlap period between the late 2002/early 2003 trucks -- maybe yours was made then? I'm not an expert on these things, I'm just a guy trying to collate existing, published data from the FSM wiring diagrams. If Toyota made some variations that aren't documented in the FSM there's not much I can do about that.

Jeff

 

[Tacoma4life]

I'm quite certain all 3rz's use a cable throttle, it's just the 5vz's that switched to throttle by wire in 2003.

 

[mosk22rte]

I'm quite certain all 3rz's use a cable throttle, it's just the 5vz's that switched to throttle by wire in 2003.

D'oh. Of course 3RZ != 5VZE. I don't know what I was thinking.

Anyway, I've pretty much run through all the material I have and have posted the resulting tables at the top of the thread. I have one or two more to make from the 95.5 diagrams that Yotaoffroad27 sent me, but if anyone has more wiring diagrams, send them my way.

 

[johnnyboy]

mosk,

i've got another for you for a 2001 tacoma with a 5VZ, going from prerunner auto to 4x4 manual.

i can't upload it and send it to you via PM so an email to send it to you would be great.

thanks, appreciate it.

 

[mosk22rte]

mosk,

i've got another for you for a 2001 tacoma with a 5VZ, going from prerunner auto to 4x4 manual.

i can't upload it and send it to you via PM so an email to send it to you would be great.

thanks, appreciate it.

PM sent.

 

[johnnyboy]

got'cha back. check your email.

thanks.

 

[dntsdad]

thanks Mosk...got the diagram

JOhnny...I hope this ECM works!!!!

 

[EnolaGaia]

Mosk:

Can you post a list of the model years for which you've already received the necessary documentation (or, conversely, the years you still need)? I can rummage around for diagrams if I know which years aren't yet accounted for.

 

[mosk22rte]

With the material johnnyboy sent me yesterday, I'm complete on the early Tacomas. For both motors (sorry, 2rz owners), I have the diagrams for:

1995.5
1996
1997
1998
1999
2000
2001
2002
2003
2004

For 4Runners, I have only 1998, but I don't know if there were any significant wiring differences between 4Runner ECUs and Tacoma ECUs. Also, I don't know that I want to make entering this data my life's work.

At this point, I'm going to finish entering what I have and then will make a single, large PDF with everything. That can be shared far and wide as far as I'm concerned. If I get ambitious, I may try to do something more interactive with the data, like an application that will let you cross reference one ECU against another model year's pinouts, but that will be down the road, so to speak.

-Jeff

 

[dntsdad]

Mosk:

I can imagine that this turning into a lot of work but it is appreciated!!

On a side note, anyone know where to buy a stock female plug for like a 97 auto ecm so that i can make a simple jumper harness. I dont want to hack the plug out of my ECM and really dont want to pay $80 or so on ebay for a used ecm for just the plug?

Anyone have a nonworking ECM that the will sell for cheap from an auto for the 3.4?

 

[Yotaoffroad27]

mosk-

i can imagine that entering all this data is alot of work. thank you for what you have done!!! maybe you can upload a generic version so people can fill in there own diagrams. maybe add a few extra pin slots an extra plug so it will cover everything. they can fill in what they need. its just an idea.. i know what your doing is getting old.

 

[mosk22rte]

mosk-

i can imagine that entering all this data is alot of work. thank you for what you have done!!! maybe you can upload a generic version so people can fill in there own diagrams. maybe add a few extra pin slots an extra plug so it will cover everything. they can fill in what they need. its just an idea.. i know what your doing is getting old.

Thanks -- for the most part it's been going well, but I've been working on the 1995.5 chart most recently, and I think it was drawn by someone who never intended to actually use it for wiring -- there's a lot of WTF?!? in that one, lol. I spent a lot of time entering the data and only later realized that Toyota used completely different connectors for the 1995.5 A/T and manual ECUs. So my calculations to marry data from the manual ECU with the a/t ECU are all screwed up. Again - WTF? Because the 1995.5 uses different m/t and a/t connectors -- really completely different ECU -- it doesn't play nice like the other ECUs. Those pinouts will probably get posted as separate charts.

Anyway, I want to chew through the remaining diagrams I have and complete this little project; it's very doable, just needs a little more time. I can post some blank tables when I'm all done. So be patient, lol. I have the data for all of the early Tacos (thanks again, johnnyboy!!), I just need to work through it. The more recent ones go pretty quickly. I was going to do the remaining ones chronologically, but I may pick the low hanging fruit and come back to 1995.5.

Jeff

 

[mosk22rte]

Mosk:

Can you post a list of the model years for which you've already received the necessary documentation (or, conversely, the years you still need)? I can rummage around for diagrams if I know which years aren't yet accounted for.

EnolaGaia and/or Johnnyboy: It seems I need the ECM terminal diagrams for the 1995.5 3RZ a/t and m/t ECUs. The PDF that Johnnyboy sent me only covers the 5VZE, which apparently used different ECUs for a/t and and m/t:

The connector graphic is in the Repair > Diagnostics section of the manual. It's often labeled "terecm.pdf" or similar.

Thanks,

Jeff

 

[dntsdad]

Dont know if I am reading what you wrote correctly, but on page 12 of the diagram you sent me earlier it has the plugs configuration for the 3rz

 

[EnolaGaia]

EnolaGaia and/or Johnnyboy: It seems I need the ECM terminal diagrams for the 1995.5 3RZ a/t and m/t ECUs. The PDF that Johnnyboy sent me only covers the 5VZE, which apparently used different ECUs for a/t and and m/t ...

Complete 1995.5 4-cylinder ECM terminals diagrams have been forwarded to your listed email address. :kewl:

Yes - the pin configuration is different for 3RZ MT versus AT.

 

[mosk22rte]

Got 'em - thanks!

I made a new template for these ECUs -- since the A/T and M/T ECUs don't share the same connectors, the info needs to be presented a bit differently. I'll post a few later today and you guys can tell me if it's right.

Dntsdad - you may be right about that PDF I sent you. Oh, well, no harm if I have the material twice.

Jeff

 

[johnnyboy]

mosk,

i know you have other issues to deal with too so we ALL really appreciate your help.

about the 95.5 engine ECU diagrams, the other day when i was looking through TIS, strangely i couldn't find the ECU diagrams for the 2 and 3RZ engine auto or manual.

whatever, thanks to Enola we got that addressed.

 

[EnolaGaia]

... about the 95.5 engine ECU diagrams, the other day when i was looking through TIS, strangely i couldn't find the ECU diagrams for the 2 and 3RZ engine auto or manual. ...

Just for the record ...

They're buried in the 2RZ / 3RZ engine chapter under the troubleshooting section - pages EG1-214 through EG1-217.

 

[mosk22rte]

1996 Taco 5VZE posted

As I mentioned yesterday, I discovered I needed to re-work my template to accommodate the 1995.5 - 1997 ECUs, which use different ECUs for each transmission type and thus different connectors for A/T and M/T. It's a PITA

I think this new template presents the data pretty well. The 1996 Tacoma 5VZE table is posted at the top of the thread and below:

1996 Tacoma 5VZE

Comments welcome -- take a look at it and let me know what you think. Now that the template is settled I think the remaining data entry will go a little quicker, but these earlier ECUs are a bit more time consuming to enter so I can't churn them out as quickly. Still, I hope to finish everything this week as I hope to have the remaining parts for my swaps by the end of next weekend

Jeff