Gen 3 1GGTE dizzy wiring.

[masterofsinanju]

Trying to work out what's what with my distributor since I have 6 wires rather than the 4 marked out on all the 1ggte wiring charts.

The wiring colours are
red/white
black
black/orange
red/blue
black/yellow
black.

These are on the ECU side of the harness

Dumbass gave some info that I'll follow up on in Scotts dizzy thread (thanks for lettign me get away with the hijack Scott!)

But I'd appreciate any thoughts or experience other can bring to bear. This is effectively a follow on from my issues with not having sting spark to the front three cylinders, which I had thought o be a rotor issue. It's not. So now we are down to working through the ignition system and wiring.

[dumbass]

pull dizzy cap off

the sensor with 24 teeth goes to pins ne- and ne on ecu
not sure which wire is which as u need to try find diagram with wire colours

then the 2 single pulse sensors are

g1- and g1

g2- and g2

i could figure it out if i had the loom

just make sure u get polarity right as inductive sensors work better wired one way than the other

is this std ecu

1ggs are pretty basic
is it cut loom
its it aftermarket ecu
strnage y u get spark only to rear cylinders

[masterofsinanju]

hey dumbass, I'll drop in and take a close look at it ASAP, but

I'd thought it was a stock gen 3 with stock loom (although somewhat stripped down) and stock ECU.

However, after looking through some posts by the previous owner, it looks like it started life as an AUTO, some of his posts are asking what he could leave off the auto ECU. However, my ECU is clearly marked M/T.

Yeah, it was weird when we started the car up for the first time in almost a year. Front three plugs very weak spark, rear plugs very strong. First thoughts were that it was something to do with the rotor configuration of the 1ggte. Two rotor arms, each dealing with 3 cylinders (so it was a bit of a leap of logic). Couple of rotors later and problem remains.

All the wiring diagrams I found/been pointed to on here and a couple of other forums, show only 4 wires. But we've had some colour mismatches on one or two other wires too.

I think you've given us something solid to look at though.

[dumbass]

just look at all 1gg ecu pinouts
see which ines have the ne- ne g1- g1 g2- g2
if one has then seperate on ecu or the - all joined on ecu harness and nto in dizzy that might be right diagram

[auto351]

I have 6 wires rather than the 4

The wiring colours are

red/white
black
black/orange
red/blue
black/yellow
black.

These are on the ECU side of the harness

.

How manny wires are on the dizzy side of the harness, 6 or 4.?

[dumbass]

what version 1gg do u have
as i cant find info with 6 dizzy wires going to ecu on my stuff at home
pull lid of ecu and check for names on the terminals inside

[masterofsinanju]

I'm fairly sure it is a gen 3 1ggte (not 1gg).

I'll try to get a pic today, but it's six wires out of the dizzy. Will do with the ECU also.

[dumbass]

My gen3 dials have 4 wires for the dizzy
In the end u can always put an oscilloscope on the wires

There wires are easy to find which is for which sensor, u will have two wires per sensor
So once u do that u have 50 50 chance to get it right

MIT take abit of guessing but I recon I could figure it out in an hour
So if everything else is ok then just guess hehehe
I can't find any diagrams with 6 wires

[masterofsinanju]

Dumbass. I took spook at the actual car this morning and point one is, miscommunication with my mechanic.
Not talking about the dizzy. 6 wires are coming out of the coil/igniters.

Wiring diagram does only show 4 wires.

Loom was indeed auto and the auto related material was stripped out.

Nothing else has been changed or mucked about with.

We are now considering damage to the ecu as it shows some water damage.

[auto351]

just confirming the front 3 Cylinders don't have spark?

sounds like the either G1 or G2 signal is missing, so faulty could still be with the ECU, dizzy or missing connection,

Here is the test process it for 7M but same as 1G

http://www.cygnusx1.net/Supra/Librar....aspx?S=IG&P=5

http://www.cygnusx1.net/Supra/Librar...aspx?S=IG&P=16

or if you have spares swap out to test.

[masterofsinanju]

Many thanks auto351. I'm looking for bits to swap out.

I'm comfortable that the connections are ok and have already replaced the dizzy rotor.

The ECU shows signs of water damage and it wont surprise me if something is cactus inside. So I'm on the hunt for one to swap in as a check.

I'll try the test you've linked to. Thanks

[auto351]

where iare you located ?

[masterofsinanju]

Queanbeyan.

As you've probably guessed, this is all a bit of a learning experience for me, so I'm pretty much playing 20 questions.

[auto351]

you originally indicated Front three plugs very weak spark , is there now no spark to the front 3 plugs?

have you checked for error code inside the ECU ?

[masterofsinanju]

I'm not quite sure how to do that. I'm assuming laptop and connector of some description, but I'll trawl through some of the older threads on here to see what's what.

Originally there was only weak spark to the front three plugs and that is unchanged.