22REFORME

So i am attempting the swap a 1997 2.7ltr engine with coil packs into my 1995 2.7ltr truck that used a distributor.

I am using the engine, engine harness and ecu from the 4runner
everything plugs in except this one plug is different.



if anyone knows of a work around or has an idea on the best way to rewire this, it would be much appreciated.

i can't seem to find a wiring schematic, i do have the old 1995 harness to steal the plugs off of if need be.

22REFORME

seems like someone must have tried this before now...

22REFORME

if this forum doesn't have a clue i feel like hope it lost.....

TheDurk

Can you find a 5-digit number on either connector?? That gives us the part number and from there I MIGHT be able to find the connection number and THEN maybe I can locate it on a wire diagram.

22REFORME

10-4! much appreciated! i am not at the trucks location currently but will update that info asap

scuba

https://techinfo.toyota.com/techInfo....toyota.com%2F


Sign up for a 1 day trial and download all you need.

22REFORME

i actually tried this, but the online form isn't working, it just gets hung up and keeps asking for my info over an over

wyoming9

iTrader: (1)

This is like any other swap and you did not do your homework!!

One should have both the EWD`s of the years you are attempting to merge.

I bet that plug is the one in the cab that needs to plug into the new ECM

Then it is really hard to tell Cruise control maybe??

It might be a big help to know just where the plug is ??

22REFORME

correct

do you have these?


these are the engine harness plugs

wyoming9

iTrader: (1)

This is bad enough all ready !!!

Did your new ECM come out of a Auto or Manual??

What trans is it going into Manual or auto ??



You might need more then one plug till your done.



There is a plug your going to need from the cab harness of the 97 that plugs into the ECM from the 97

the three plugs come from the engine bay the 4th is inside the cab.

This is from Memory so I could be wrong but there is also another plug that comes off the engine harness that connects to the dash harness.

22REFORME

donor vehicle was a 97 4runner, 5spd 2.7ltr
swapped truck is a 95.5 tacoma 5spd 2.7ltr

there are 4 connectors on each of the engine harnesses, two plug into the ecm and two plug into connectors in the dash. then there is one dash connector that plugs into the ecm.

i am using the ecm and engine harness from the 4runner. the trucks dash harness plugs into the ecm fine but i am unsure if the wires in that plug are in the correct positions.

one of the two other connectors on the engine harness plug into the trucks connectors. the connector that plugs in has a different amount or wires than the tacoma connector. the connector that doesn't plug in also has a different amount of wires, this connector is much smaller than the tacomas connector.

22REFORME

so far this is what i have found, but i am not all that great at reading wiring diagrams.

links to images

https://i.imgur.com/jXQHwGU.png

https://i.imgur.com/Gx00xpv.png

https://i.imgur.com/c6s2TZw.png

https://i.imgur.com/qZAHbn2.png

TheDurk

You are still missing some needed pages--the pin-out diagrams for the ECU connectors. They should be at the end of the engine control chapter. (Later EWD's had them all at the end of the book in a separate chapter.)

Then you can take a wire going to IF1 Terminal 3 and see where it is physically on the plug and what shape that plug IF1 is, etc. Without the pin-outs, you are still pretty lost.

22REFORME

not sure i am following... aren't the links 1 and 3 for the ecm pinouts? also what is IF1?

TheDurk

OOPS, I didn't see it at the top of link 3. So you have it for the '97. But where is it for the '95?

IF1 is just a plug designation I made up. The actual designation on the '97 is E5,E6,E7, and E8. You need to have the same diagram for the '95. Then figure out which one on the '97--E5,E6 or whatever--matches the one you are interested in. I'd do it if your pictures were in focus and clearly labeled as to what they are but I can't do it from what's posted.

Then you can look on the table wiring diagram and see in the middle of the block that each plug is associated with a code letter. on the '97, E5 is A, E6 is D, etc. Then for each wire, where it hits the ECM block, you will see a letter and a number, like 21-A that is on the black wire with yellow stripe that goes to the 4wd Detection Switch. The 21A tells you it goes to E5 Terminal 21.

So if you show me a good pic IN FOCUS of a plug on the '97, I can tell you what plug it is, then what its letter is, and then we can start looking for all the wires that go to it, what color they are, what terminal they are on, and where they go...except I can barely read the letters and numbers. Hopefully, you can learn to do it yourself with a little coaching.

But you still need the pin-out for the plugs on the '95, unless I missed it.

TheDurk

OK,got your PM. I did miss it on the '95, too. I.m not used to seeing it in that location.

So what you need to do, because I can't do it from your pics, is match the plug on each truck to a plug pin-out, say E7 on the '96 and E6 on the '97. Then we can go pin-by-pin and see what is there.

I'd rather do this on the forum as it displays better and a lot of people have no idea how to do this--might help somebody.

22REFORME

ok so it looks like the one plug in question going to the ecm is E5 on the 95.5 and E8 on the 97. This is the 22 pin connector that comes from the truck. here's what i have:
E5 on the trucks ecm
PIN FUNCTION WIRE

1 BATT B/W
5 W V
8 ACT L/B
9 SP1 G/O
10 AC1 L/Y
11 STA B/W
12 +B W/R
14 FC G/Y
22 NSW B

E8 on 97 ecm

2 BATT B/W
4 W V
6 ACT L/B
7 AC1 L/Y
8 SP1 G/O
11 STA B/W
12 +B W/L
22 NSW B


Lookin right? the pin numbers not mentioned must not have wires.
FC whatever that is, is the only oddball that exists in that plug on the 95 but a different plug on the 97. FC on the 97 is in the first plug not the last like on the 95.

TheDurk

Good work. You seem to have it figured out. You can probably just repin the wires into the matching connector plug housings if you have it. If you are lucky the pin and wire will fit perfectly. Those ECU connection pins are mostly the same. If you don't have the needed plug from the donor, Toyota sells the connector housings with no guts for a couple of bucks. The hard part is finding the part number. If you need to go that route, let me know.

Repinning the connectors is an arcane skill. I've done it a few times, but I can't say I'm good at it. Here is a present--the manual linked below has instructions for getting the wires/pins in and out of the connectors plus more info then you ever wanted to know on Toyota connectors. It is also one source of the part number for the housing if you can succeed in matching the pin-out profile. The better way is the EWD if you have access. They are NOT in standard parts listings, but when you try to buy them already knowing the number, they come right up, mostly.

http://wilbo666.pbworks.com/w/file/f...RM1022E%29.pdf

Let me see what I can figure out about FC. Again, the best thing is just to move it to where it wants to be.

Yes, it is common for ECU plugs to have empty holes.

EDIT: So FC is the link between the ECU and the coil of the circuit opening relay that controls the fuel pump. I'm guessing FC means Fuel Control or Fuel Cut-off. Pretty important little wire.

22REFORME

Aside from this one plug that comes from the truck the other plugs come from the 97 harness, ie are already wired properly. So it matters if these pins in this plug are input or output. Basically if these wires are telling the ecm something then it should be ok, but if the ecm is telling the truck something then I need to get FC from the other plug.
That make sense?

22REFORME

Once thise one plug is sorted at the ecm, I need to find the pinouts for the engine harness to truck harness connections. Any idea what that is called? These are the plugs I posted pictures of.... the grey plug with the white plug