Engine wiring difficulties, swap gurus please have a look:
I'm in the middle of the wiring now and I have a couple questions.
First of all, there are 8 wires coming from the C and D plugs on the Matrix 2ZZGE ECU that are not on the wiring diagram. They all went under the dash of the car. There are 2 light green, 2 light green/black, 1 dark blue, 1 red/black, 1 red/yellow, and 1 green/white. With the last one the green is kind of an aqua color. Any idea what these wires are and how to find out?
Also, there are a couple of wires coming out of the 2ZZGE ECU that don't seem to have homes.
One is the IGSW, which I think stands for ignition switch. It is a black/orange wire that goes to the top of the C/OPN relay in the diagram. There is no matching wire on the 1ZZGE diagram.
Then there is the MREL wire, black/white, and that goes to the top of the EFI relay in the diagram. Again, nothing matching on the 1ZZGE side.
The wires that are not on the wiring diagram might be for the OBD II connector - how much of the 2zz harness do you have? (hopefully all of it!). See if they match up to what you have on the 1zz harness anywhere.
I'm almost certain IGSW stands for Ignition Switch. That sounds like its a very important wire - if it goes to a lot of places in the car, this is what probably powers the ECU when the key is in the 'on' position. You may need to find a VERY nice person with a 2zz car and follow those wires that are not listed to figure out where they go.
Good luck!
-Charlie
__________________
2003 Impreza WRX Wagon 5spd - 2.2L stroker + other goodies
1989 Camry Alltrac LE 3S-GTE 5spd - SV25/ST205 hybrid
1990 Camry 3S-GTE 5spd - parted out / junked
1990 Camry DX 3S-FE 5spd - The original white90dx; gone but not forgotten
First I would like to figure out where those extra 8 wires go. I will probably try to trace them out in the donor car.
Second, with the IGSW wire that goes to the ECU, I need to know if I can leave it disconnected, and if not, where to connect it. The car that the engine is going into doesn't have an IGSW wire going to the ECU.
I have a similar question with the fans. The donor car has two wires going to the ECU, fan one and fan two. The recipient car does not have these wires hooked up to the ECU, the fan is turned on and off by a temperature switch. So, should I leave it hooked as it is now in the car, or should I run wires to each of the fans so that the ECU can control them?
Yeah, if those wires aren't on the diagram (keep searching for them!) then you will just need to trace them. Good luck with that one...
The IGSW wire is either a switched 12V or switched ground when the ignition is in the 'ON' position - hook that wire to the ignition module in the new car (the wire that is 12V when the key is moved to the on position).
You will need to change the fans over to being ECU controlled. If the polarity of the signals is the same between the temp switch operated fans and ECU controlled fans (hopefully it shows that on the diagrams), you can just control the fan relays in the new car from the 2zz ECU.
I hope this all works out for you... A motor swap is a big project. (One I might do in my Camry if I get up the money and time someday!)
-Charlie
__________________
2003 Impreza WRX Wagon 5spd - 2.2L stroker + other goodies
1989 Camry Alltrac LE 3S-GTE 5spd - SV25/ST205 hybrid
1990 Camry 3S-GTE 5spd - parted out / junked
1990 Camry DX 3S-FE 5spd - The original white90dx; gone but not forgotten
Yeah, if those wires aren't on the diagram (keep searching for them!) then you will just need to trace them. Good luck with that one...
The IGSW wire is either a switched 12V or switched ground when the ignition is in the 'ON' position - hook that wire to the ignition module in the new car (the wire that is 12V when the key is moved to the on position).
You will need to change the fans over to being ECU controlled. If the polarity of the signals is the same between the temp switch operated fans and ECU controlled fans (hopefully it shows that on the diagrams), you can just control the fan relays in the new car from the 2zz ECU.
I hope this all works out for you... A motor swap is a big project. (One I might do in my Camry if I get up the money and time someday!)
-Charlie
Okay thank you. What if the polarity is not the same?
I'll try to locate those wires. They are 100% not on the engine control diagram, but maybe they're on another one...
Okay, next: There is one wire coming from the 2ZZGE ECU labelled "TC". It is Pink/Black and goes to the 4C connector and then the Data Link Connector 3. There is no wire labelled "TC" in the 1ZZFE diagram...
Not sure what MREL is, but it looks specific to the 2ZZ's ECU. I'd leave it hanging. At first I thought IGSW was B+ on the 1ZZ or STA...but that theory was shot down.
Then next, what about the WFSE wire? In the 2ZZGE diagram, it goes to data link connector 3, it is a solid pink wire. It doesn't show where it goes from there and there's no such wire on the 1ZZFE diagram.
what you would normally do in an engine swap is make sure you have the wiring diagrams for BOTH cars... match the codes up... i know there is IGSW on BOTH diagrams... they need to be connected! just connect them like the drawings. its like matching. IGSW goes to ummmmm.... lemme think.... OH, ITS IGSW! its almost as simple as the round peg in the round hole.
i know im just being dumb, but i had to go over this with my engine swap, and it wasnt fun, so i can feel ya... but just take it one at a time and match up the wires. use your head.
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