bman602

Posted this in the wrong section before, hopefully get a bit more response here. Hey guys, quick question. I have a 1985 auto Toyota pick that I did an engine swap on with a 1990 22re. Used the intake, tb, and injectors from the 85 to work with the original ecu and harness. Switching over to a 1990 5 speed standard from the guy I bought the engine from. He's doing a swap to a v8, so his engine harness and ecu are available. His harness is for a manual transmission. Mine is in kinda crappy shape, so I was wondering if it would be straightforward to use the newer harness on the truck (using the 90's tb, intake, injectors, etc...). Any input is appreciated.

wyoming9

iTrader: (1)

The problem is going from your auto to a ecu for a manual.

Without sitting down and looking at both ECU`s and the EWD`s for both vehicles

Most times the manual and auto ecu`S use different plugs

bman602

hmm, going to get the seller to send me some detailed pics tomorrow and compare to what I have now. If there is a way to do this I would like to make it happen as his wiring harness is in much better shape plus I already have the intake, injectors, etc, all ready to go (i do know that I can swap my injectors and keep my old ecu, but my injector plugs are getting nasty). Will post pics when i receive them.

Terrys87

iTrader: (1)

If you are going to thru the trouble to swap harnesses, I would get the 85/86 and preferably the 85 for your truck. There are some plug differences and the 90 is another generation so don't know what all is involved in that.

bman602

If I had access to a good 85-87 harness I would use that instead. But I do not at this time. I have used this as a guide http://www.22rte-trucks.com/coppermi...PinoutList.pdf and it appears his harness is the lowest shown of 1990's, for the 85 reference I used http://www.diyautotune.com/tech_arti...oyota_22re.htm, so as you can see very close with a few differences to over come. Waiting for pics from him to post, and will take some of mine when it warms up (-34c here today). I just want to get a more solid harness in place, and most 85-87's I have seen are in no better shape than my own.

Hadmatt54

Are you sure? Have you thoroughly researched this? The injector driver circuit of your 85 ECU is designed to fire low impedence injectors (1.3 ohms) which the 85 injectors are. The 90 injectors are high impedence (13 ohms). If you try to use these with the 85 ECU you will destroy the injector driver circuit. If you use the 90 injectors, you will have to use the 90 ECU, bypass the ballast resistor (in the body harness) in the 85 injector wiring and rewire your dash harness to accept the 90 ECU.

bman602

I guess I could of worded that better. I meant keep my current injectors with my current ecu and use the newer intake, tb, etc. But if it is possible I would rather rewire the dash harness and use his engine harness, ecu, and injectors as they are in much better condition.

Hadmatt54

Anything is possible..it just boils down to learning how automotive circuits are wired (especially Toyota) and how much work you want to put into it! The best part of wrenching on vehicles is to push yourself to learn new things. Just to give you an idea as to how much may be involved in custom wiring...last spring my son and I built a custom Suzuki Samurai, the only thing Suzuki about it is the frame and body. It's all Toyota and I had well over 100 hours probably closer to 120 hours in the custom wiring harness that I built, but with wiring the end result is directly related to the time you put in it. If you look my Sami over you would not know that the 3RZ is not factory.

Terrys87

iTrader: (1)

Back to your orginal post about if it is straight forward swap. I to have an 85 truck that someone installed an 89-95 harness in and I didnt have any luck getting it figured out. Electric isn not my strong point so you might have better luck then I did. The 85 do not have a Starter Relay like the 86 and up. I dont know if the 90s did or not, but in the first post on my 85 build below, I learned about that later on.

Reason I bring that up is I am not sure how your Steering Column would work or if you would need to change out the Ignition Circuit as well. Just giving you some ideas or something to think about. I went back to 85 just because I am not sure what all is involved.

bman602

hmmm, did not think about that starter relay. While I am always up for a challenge, this looks like a whole lot of frustration. So either redo what I have or search for a good 85 harness. I think I will pass on the harness. Thank you for all your input and wisdom, will post the build (and a lot more questions) soon.

Hadmatt54

Terrys87: I wonder if that was just early 85...I've got a 85 cab auto harness that has a starter relay, I wonder if later in the 85 model year they had a starter relay like the 86? Having said that, it is a Canadian harness, so maybe that is the difference.

Terrys87

iTrader: (1)

I feel you two guys have a better understanding of electrical better then I do, so I could be wrong, but I try to post pics or links to show what I can. If you find something that is not quite right, correct me.

Hadmatt54...My 85 is a late 84, making it an early 85. You could be correct and I have only seen one automatic as they just arent common around here. A friend of mine has an early 85 runner with the manual tranny and his too doesnt have the Starter Relay. I had 85sr5 to look at his truck and his didnt have the Starter Relay. I also looked at a few other threads and didnt see any as well. So I just assumed that all 85 didnt have them.

Not sure what the Toyota engineers were thinking but it seems like on the newer automatic trucks, they didnt have relays in them. Look at the last few post on this thread>>> https://www.yotatech.com/forums/f116...ttempt-277659/ I have never worked on an automatic truck so I dont know about these. I have seen California trucks and Federal trucks, not sure what they would change on a Canadian truck. Just out of curiosity, what are some of the differences that you know on a Canadian truck?? I havent seen a Canadian truck and what would the label say under the hood?

bman602...Sounds like we are working on the same 85,lol.. I have swapped several harnesses from 84-88. The newer ones I dont know as well, so the following informationn is mostly for these years of trucks and some does overlap to the newer models. Also I am referring to the manual trucks as I have not worked on any automatic trucks, so of this could be different.

84 were carbed and have a Voltage Regualtor on the inner fender. I am guessing the newer trucks had it in the alternator??

85 No Starter Relay, Same injectors to 87, the Fuel Pump Bypass and T1/E1 is on the drivers side fender. Blinkers and other plugs tend to be round. O2 sensor in exhaust manifold.

86 Has Starter Relay, Same injectors 85-87, Fuel pump Bypass and T1/E1 on drivers side fender.Blinkers and other plugs tend to be round. O2 sensor in exhaust manifold.

87 Has Starter Relay, Same injectors 85-87, Fuel Pump Bypass and T1/E1 on Passenger fender. Toyota started using more flat style plugs from 87 to newer models. O2 Sensor in exhaust manifold. O2 Sensor is in exhaust manifold.

88 Has Starter Relay, a one year only injector, T1/E1 and test ports are a square plug on Passenger Fender. O2 Sensor is in exhaust pipe near transfer case.

Codes... http://4crawler.com/4x4/CheapTricks/...es/index.shtml

How to get Check Engine Codes. I just put this up for others. Applies to 87 and up. 86 and older is the bottom picture.


The Diagnostic port for the 85-86 is on the Drivers side inner fender and is nothing the same as the 87 and up. Here is T1 and E1 jumped. The codes and engine flashes are the same as the rest of the trucks on the dash.


Codes...http://4crawler.com/4x4/CheapTricks/...es/index.shtml

http://www.youtube.com/watch?v=9qEQM...ature=youtu.be

Here is how you do a Fuel Pump Bypass on the 85/86.
Jumper wire the Yellow Plug on Drivers side. ( Jumper wire should be in both contacts for testing, I just didnt have it in for picture purposes and mostly a referece for me at a later time.)


Different styles of injectors. The Red ones have the fool proof tabs either above or below the electrical pins.Here are the 3 types of injectors. The white one is 85- 87, the 88 looks just like the 89 and up but the fool proof tabs are different. I dont remember which one is which but 85-87 is 1.5-3.0 Ohms, 88 is 1.0-2.5 Ohms, and the 89 and newer are 13.4-14.2 Ohms. Do a resistance check to see which ones you have.

Outsane

you can remove or add the resistor box to run which ever injector you would like..

I put newer injectors in my rig that used to have a resistor box

Terrys87

iTrader: (1)

From what I can tell the runners and pickup bodies are all the same. The grill and harness is basically what determines what year you have. I am going to try 4Runner harness in mine. The difference there is where the fuel pump, fuel float, and tail lights all run down the frame on a pick up. The fuel pump and float run down the frame on a 4Runner but the tail lights run inside the body. With a little splicing, you should be able to make a 4Runner harness work if you had to.

bman602

just looked at mine and no relay like Terry's, and while I am not awful at wiring I am also no expert. Interesting though, mine is Canadian 1985 sr5 auto, March 85 build date.

Hadmatt54

I'm not sure what the build date was on the 85 that I have the harness out of.
We scrapped the truck a couple of years ago and I held on to it as a just in case. It was an 85, 22-re, auto, 4X4!

Terrys87

iTrader: (1)

I am doing a step by step on how to do a wiring harness swap. Going to wait it warms up before I finish it. https://www.yotatech.com/forums/f199...l#post52150377 Trying to find a good harness is the hardest part. Below is a few resources. I eventually can find one for a better price. It just takes a while. Also you can post in the Want to Buy Section.

https://www.yotatech.com/forums/f12/
http://www.4runnerhouse.com/
https://www.yotatech.com/forums/f37/...i-have-261363/
https://www.yotatech.com/forums/f37/...u-need-162603/

Galindo519

Hi guys first time posting so be kind. Have a 85 4runner with too many mods to list but I was able to get my hands on a 1990 pu with our favorite motor a 22re. It's a 2wd and the motor is flawless and want to swap it to the 4runner. Should I use the 85 ecu or start tearing out the 90's harness.?

wyoming9

iTrader: (1)

Welcome to Yota Tech!!

First thing to do this you need to swap the oil pans and pick up tubes 4x4 and 2wd are different.I you know this all ready good.

You are most likely going to need the 1990 harness and ecu you need to pull the intake apart to get the injector harness off in any case.

I know the injectors changed I think in 88 Without looking I can`t recall

Using the harness with the engine would be the easier way to go.

Galindo519

Would using the 85's efi and ecu be applicable on the 90 22re or should I take the time and wire it up.