Re: TOY: Re: 22RE EFI Harness ?

[Thom Singer <ntsqd@xxxxxxxxxxxx>]

When my friend Craig did the loom for the Toysuki (4A-GE 1600cc 16V twin cam into a Zuk) he started at the engine and tried to pull each circuit out of the
loom. This proved very frustrating for two reasons; he's used to GM color coding so everything wire color-wise was screwed up for him, and there were a lot of
dead ends. What he finally did was to start at the computer and pull each wire out of the loom, labeling where it went. Once he had the computer plug completely
free of the rest of the loom then he started eliminating unneeded wires. He said that went much, much faster.

"C. Andrew Zook" wrote:
> 
> Yes, there is THAT harness which goes to the engine, but also to the
> computer are (at least on the MKII) the wires from the relay box (driver's
> side) which are tied in to the rest of the harness - especially the ground
> wires, and the instrumentation stuff from the computer (probably just the
> check engine light??).
> 
> Any other parts of the EFI system (O2 sensor for instance) that are on the
> driver's side of the vehicle also run in the harness from the one side of
> the vehicle to the other.
> 
> Gets to be a little confusing! I would seriously recommend that you label
> everything "Remove" or "Keep" as you unplug it. Keep everything pugged in
> that you will need to have connected at the end, and start it after you
> disconnect something that you are unsure of to confirm that the plug you
> just disconnected was necessary or not.
> 
> For the most part you will know if something is needed or not, but I must
> admit that there were about 5 "unknowns" that I did this with. Usually they
> ended up being relays of some sort - and unmarked.
> 
> Unless you are much better than I am at wiring diagrams, I would not
> recommend trying to go off of that to sort out the harness. You will get
> yourself lost in a bundle of wires in no-time! This is what I did When
> trying to convert my 22R to a 22RE with Celica parts. I got "VERY"
> frustrated and gave up.
> 
> > I pulled the harness off of the engine on my 1987 Supra and it appears
> > to only go to the engine. I didn't see anything going off of that
> > harness to anything else in the engine bay. I haven't pulled the ECU so
> > I don't know what is happening inside the firewall.
> >
> > I will take note of what color wires are actually going into the engine
> > bay, in case it is just one harness inside the car.
> 
> 4x4Wire.com Toyota Section http://www.4x4wire.com/toyota/

-- 
TS
Chico, CA

"It only seems kinky the first time" - bumpersticker seen in Lost Wages