OEM MK4 management wiring => Mk1/2/3 harness install FAQ (Now with added dieselness!)

Hi i rewired all but theres 2 pins that i dont know what are they used for :
In t10 white i have pin 5 red/blue
In t6 red pin 2 green/red
Do you know what are these used for ?
Many thanks and sorry for bad english xD

 

Hi all, great thread here can't say how much is helped over the last week's.

I'm swapping my AAA VR6 to BDE and I'm nearly finished. but I'm stuck on something, and I just can't see past it... Maybe someone can help?

So.. I'm not getting power to z1 with ignition on, I changed the factory 167 relay to a 409 relay and still. Nothing. The only way to power it up is using a 100 relay..
I've checked all earth's, so ECU, G1 5+6, T14 7+9 are all grounded to battery/head etc.
Knowing all this what does it tell me??
I paid to have my IMMO off but could that be the issue?
Thinking about it could check for signal at G1 3 when turning on ignition?
Is that how IMMO works, cutting the fuel relay, and in turn all the rest?

Sorry if my first post is something that's been discussed. I couldn't see it..

Any help would be appreciated.
Dave

 

Ok so I can scan. I have codes for sai secondary O2 etc. All deleted and need coding out.
I have 18058 which is I believe something to do with communication with the gauge cluster.
No other codes.
The TB does it's buzzing on ignition so there's power there. Even got spark when cranking.

Think I'm just missing fuel, or maybe injection issues?

And G1 10 on mine is unused. I ran the mk4 ECU relay to G2 4 ign live fuse 15

What does IMMO control on this ECU? Do you know?

Much appreciated mate I'll check the lot whilst cranking tomorrow.


Dave

 

Ok great, the red jumper block is there yes. I'll look into those things tomorrow and try and see if I get a signal from ECU to G1 3.

Hope it's not the !

Thanks for your help

Dave

 

Is that the bigger of the two plugs?

 

Ok, I'll check it out. And let you know what happens!

Cheers

 

So I managed to fire it up today. the ground to G1 5 or 6 ( can't remember) was the culprit.
I'm a bit disappointed as I re-did them both as I wasn't happy with them! Must of got it wrong somewhere along the line.
I've Got flashing water and oil lights though, so I'll be back with more questions if I can't find it what's wrong.

Dave

 

@rubjonny
You are really big!.
Thanks to you i started my AGU from the first time. i was afraid that will be harder. 3 day study and engine idling.

One again. Thank you

 

Open to suggestions on something to do with the installation, my ecu sits in the scuttle central under the wiper mechanism, what is a good way of securing it, not too much vertically room wise, was thinking of bonding a fabia ecu bracket in there, but not sure of clearance for removal, what have you guys done?

 

I'll go looking for the bracket, cheers

 

You are a real legend, much appreciated all the content shared on the post and the quick response !!
It started all perfect only problem was acelerator pedal was not compatible , i adquired one with the correct oem number and its making noise again
Greetings and thanks from spain

 

Hey guys, I just took an already done loom out of a jetta with 20vt & have fitted it to my golf 20vt as I wanted to change my Narrowband to wideband, have changed all sensors etc. to suit but the car won't fire, turns over fine, fuel pump primes however when scanned with vcds I get a
17072 Ecm power relay load circuit p0688-35-00-open circuit error?
I have relay 428 in the car in fusebox area
I'm fairly sure this circuit powers the coils/injectors so what plug or pins do I not have plugged in correctly or easy way to check with a simple multimeter?
really struggling as expected plug & play as came from jetta
anyone point me in right direction?