Can You Help Me Identify This Plug? Wiring R32 Rb20Det

[Willis]

I have a project 1991 hcr32 4 door that needs a ecu and engine bay loom.

I've purchased a r32 manual gts-t ecu and engine wiring harness.

Went down to the car today to start nutting it out and making sure it's going to work when i ran into this problem..

After connecting every connector i'm left with the 2 green plugs from the engine loom, and a long white plug from the body side of the loom (the one i'm pointing to in the images)..

Anyone have any idea's?

What the plugs are?

What they do?

I must be missing something obvious?

Thanks, i've also searched and looked at images of loom's on google..

Willis

[Chris Rogers]

On mine I had a spoiler controller here. If you do not have that option then it will be that plug and 5-6 others around the headlights . It should be on the right side.

[StevenCJR31]

They should be plugs that go into the body loom which are above the passengers side footwell just up from where the ecu is bolted in

[Willis]

On mine I had a spoiler controller here. If you do not have that option then it will be that plug and 5-6 others around the headlights . It should be on the right side.

Not sure if it has a spoiler controller. What do you mean it will be that plug and 5-6 others around the headlights? What about the 5-6 other plugs?

I will have more of a look on the right side, already had a quick squizz. It's also not in the rest of my body loom that goes to the headlights etc..

[Willis]

They should be plugs that go into the body loom which are above the passengers side footwell just up from where the ecu is bolted in

I've been told the green one's are relay's. Easy done.

The white one though is still a mystery. It's on the body loom. What i'm trying to say is the engine bay loom has no plug for this!

[StevenCJR31]

The loom you have mustve been modded or cut then

Just checked a spare engine loom that I have and it has the white plug just like yours near the relays and it has the body loom plug still attached with an orange wire and an green wire hanging out of it(Iits been cut)

[Willis]

Could you take a photo of the plug on that loom for me?

Thanks.

[Willis]

Continued my search today with little to no avail.

Started continuity testing the "Unidentified plug" and found 3 wires all seem to head to the heater box / climate control system.

The thick black wire heads to the blue fuse box? And a green wire with yellow strip also heads to the same blue fuse box.

As pictured;

I was wondering if there is some kind of climate control / heater controller or junction box that this plug would normally go into?

[_x_FiReStOrM_x_]

I happen to be doing a bit of wiring work today on my HCR coupe manual, and this plug is disconnected - everything in the car functions perfectly. I suspect it may be for auto transmission variants, but could be wrong. Good luck.

Edit - I mean the large plug in your first post.

Edited November 9, 2013 by _x_FiReStOrM_x_

[Traah221]

For some added comfort, I've traced a few RB20 harnesses for my RB25 conversion, and on every one the 2 green plugs are relays, easy, and the long white plug in your picture has never had a home, and the car has never had any problems running. Should be noted that all the in cabin amenities work just fine too.

[Willis]

For some added comfort, I've traced a few RB20 harnesses for my RB25 conversion, and on every one the 2 green plugs are relays, easy, and the long white plug in your picture has never had a home, and the car has never had any problems running. Should be noted that all the in cabin amenities work just fine too.

Thanks for the reply mate.

After pestering every skyline owner I knew to check on their own cars, I've found that in all manuals the plug is "spare" and in an automatic the plug has a home..

Edited November 19, 2013 by Willis

[Dylan454]

just too confirm what you said automatic 4 door r32 skylines have a ecu or computer there for that plug no idea why because I had the same problem. I had a automatic harness for a manual car and I found a random ecu and was very confused but I found out I didn't need it and threw it and my car works fine

[533 RYC]

'Random' ECU was PROBABLY some sort of a piggy back TCM (Transmission Control Module)/big extra Inhibitor switch relay for the engine ECU. Automatic vehicles only. Couldn't bee 100% as I don't own gay autos.

[Willis]

Thank you for all the reply's btw!

Still working on this car.

It won't start, figured I would just add a post to this thread instead of starting a new.

I've got a few plugs that I would like identified ^_^

Not starting symptoms;

There is no fuel, i've pulled the lines off and cranked the car over. Nothing comes out.

Initially replaced the fuel pump as I assumed it might have died.

Still no fuel.

Checked fuses, all good.

Checked fuel pump relay in the boot, and the 2 x ign and acc relays in the passenger footwell.

ECU displays a solid red light with accessories on.

Goes out when cranking.

Not sure if this is normal?

Engine cranks, but doesn't fire. (no fuel obv)

The following plugs are unplugged, as i can't find a home for them.

This one, it's near the power steering fluid reseviour;

And this one near the brake master cylinder;

Also i'm not sure where this wire goes, is it an earth?

Any idea's, or plug identification would be fantastic!

I had hoped that the ECU had no power or something easy, but alas the light made me sad!

Cheers!

[Ben C34]

Check that bridging the fuel pump relay turns on the pump.

Edited September 23, 2014 by Ben C34

[Willis]

Check that bridging the fuel pump relay turns on the pump.

I removed the relay's and tested them with power on the battery. It made an audible click as the relay engaged.

How do I bridge it on the car?

[Ben C34]

Put a wire between the connections at the base of the relay to pretend it's the relay.

[Willis]

Put a wire between the connections at the base of the relay to pretend it's the relay.

Alright I will give that a go.

[jiffo]

Your first picture at the power steer tank would be for the Air Reg resistor.

Next one near brake booster would be for the MAP sensor, factory boost gauge.

Can't make out the one that's taped up, perhaps the Air Reg? Have you got it in? It's buried under the plenum.

[Willis]

Your first picture at the power steer tank would be for the Air Reg resistor.

Next one near brake booster would be for the MAP sensor, factory boost gauge.

Can't make out the one that's taped up, perhaps the Air Reg? Have you got it in? It's buried under the plenum.

Thanks for the reply;

What is an Air Reg? What is it's function?

MAP sensor / boost gauge. Is this required for the car to run? I must be missing the sensor. It bolts to the firewall? Near the brake master cylinder?

The last one is factory shielded like that.. not sure where it goes? The Air Reg? The cold start thingo? Yeah that's in with the hoses hooked up to it. I think there's a plug on it also?