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

Hello
Rubjonny great and very helpfull writeup.
Car started on the first try with no stable idle with not good throttle responce
Check the faults and the code was po638 checked the throttle body connector pins and I had 2 + ground= 5v and 2pin + 6pin = 5v as supposed.
Erased the code and did the system voltage drain procedure.
And now car starts and stalls immediately and codes are po638 and p2101 but are shown as pending codes.
Do you have any suggestions?

 

Checked for codes with vcds and these are the codes I got:

17931/P1523/005411 - Crash Signal from Airbag Controller: Implausible Signal

18057/P1649/005705 - Powertrain Data Bus: Missing Message from ABS Controller

18058/P1650/005712 - Powertrain Data Bus: Missing Message from Instrument Cluster

P1558 - Throttle Actuator (G186): Electrical Malfunction

17987/P1579/005497 - Throttle Actuator (J338): Adaptation Not Started

17953/P1545/005445 - Throttle Valve Controller: Malfunction
Codes come again instantly after I erase them.
TBA can't be done because I get error at 60 group.
Checked the 6 pin of TB to ecu plug and I have continuously at all of them.
Should I try an other throttle body?

 

Took all the harness out check all the wires and didn't find any problem at all.
Then changed the ecu relay because the ohm between 85 and 86 was 153ohm instead of 78ohm of the new one.
Nothing changed
Finally the problem solved after changing throttle body.
TBA run without problem.
Cooland temp on dash matches the temp on vcds.
Fans worked as they should.
Managed to wire the 1j0 919 506e fan relay so I can use the secondary cooland pump with the 10min timer after ignition off and also control the AC (this corrado didn't come with AC and had some aftermarket relays laying in the engine bay)
Put the fuse box on battery run the thick red power wire to the ce2 Y/3
Next step is to put the engine wire harness together shorten the wires and run them inside the car.
Ecu position will be at the place of the corrado abs ecu near fusebox.
After that it will be the time to wire the abs from donor car.
Thank you very much for all the help!!!

 

@rubjonny good morning gents, am I process of doing v5 aqn engine conversion into golf mk1 1990 cabriolet 1.8 carb. The donor car is a beetle v5 2003.
My question is does the wiring loom match or are identical to mk4?
Am i ok to follow your wiring instructions?
Am unable to get data for beetle.
Any help is much appreciated mate.
Thanks

 

top man, many thanks mate, bought whole donor car, so everything is there. Wish me luck 1st time am doing a conversion in long time since i put g60 in jetta back in the day.
I will be needing alot of help and advice, hope you guys dont mind?
Thanks again

 

hello mate,

Need your help mate, i sent my ecu to delete the immo, and he failed to do it 1st, so i sent it back now he damaged the eeprom chip.
My question is as i cant find like for like correct part number for my ecu but found for same engine ecu from bora rather than beetle. My ecu part number 066-906-032AP
One we found is This 066-906-032AK
They both from AQN engine
Will that make an difference?
Your help appreciated mate

thanks mate

 

Hi
I’m having a problem trying to start my 1.8t on a rabbit I’m using a 1999 Audi A4 harnes and ecu I have the diagram I think I did everything right but when I started the car it doesn’t fire up but It will if I stimulate ground in any of the injectors I have power on the both of the connections of the injectors. But when I disconnected the injectors and I use a tester I have power in the power wire and pulse on the other connection but only change if I connect the injectors..
Any idea or someone who knows what is happening
Thank you….

 

How can you tell its for an automatic car from looking at part number pls?

 

Following @veedubv5 question, and as my mate has me heavily involved in his r32 to mk3 swap planned, Is there any disadvantage or problems with running an automatic ecu with a manual converted engine?
Never thought of it before, most TT 3.2 are auto and I've sourced the flywheel and box off a v5, even grabbed the clutch switch bits!
Is it bits to code out, etc?

 

Hey Jonny,
Awesome work you are doing here
Im converting a 1997 AGU from a a3 8l into a g Mk2 with ce1 and in completely lost with the Wiring... i am trying to figure out how this Works and tried to use your Chart from Page 1 of this thread, it took a pretty Long time until i realized that my agu doesn’t have the brown and green connector, so I had to realize that my AGU wiring is older than the one in the chart. I only have a red and a white connector. That’s a big problem for me and the language doesn’t make it easier for me to figure out how I get my engine to work :/ . I wanted to ask if u have a chart for the conversion of a old AGU wiring to a CE1. It would help me a lot.
Would be happy if u answer me
And may I have a few more questions like how to set up my catchtank with an 044 Bosch pump or what I should do with the elevation sensor because I don’t know if I have to get it placed in my mk2 or if I can throw it away.
Well this whole thematic isn’t pretty easy for an 20 year old German who is trying to get his answers in an English based Forum

 

Hey Jon I change all my wiring for a mk4 immo off the bosh Med 7.5 but I got the same problem with the injectors and I got very poor earth from the ecu,the earth from ecu to fuel pump relay is not working
Do you think I’m missing a loom or something is wrong? I’m using 428 relay a 52 relay for fuel pump,
I’m using a fuse box for all the accessories..