OEM management wiring: 1.8T => Mk2 harness install FAQ

Yes i used 2 relais specific for this Ecu 418 and 419 If i remember well. No related dtc to them. In worst case i would have been able to get engine into high revs, but start should not Be a problem.

 

Could someone give me a little help,
I wired a AUQ engine into my mk3 track car. I followed the guide but have a strange problem.

The coils are live with the ignition off. As soon as I turn the ignition on then the coils die and the car won't start.
I must of wired something wrong. If I put 12v to the single wire plug next to the ecu relay then it starts and runs fine.

Any pointers?

Cheers

 

Which one, the one in the fuse box?

Left all of them as they were before conversion.

I'm also getting ECM power relay control open circuit through vdcs.

 

It's still in the box in the engine bay.

 

Heres my connections.
G1
2-outside air temp sensor-brown/white.

3-fuel pump relay earth trigger-yellow /blue----T6 brown connector pin 2-purple/white.

4-ecu switched live-black---T6-brown connector pin 1 15amp-black or black/purple(and vss pin 1).

6-fusebox-earth to engine block-t14a pin 9.

8-live from fuel pump-red/white---T14a pin 6 10amp-yellow/black.

10-live from ecu relay-black/yellow---T6 brown connector pin 5 10amp-blue/yellow

11-vehicle speed sensor to pin 2-white/blue.

12-tacho to clocks signal-green/black---T10 orange connector pin 2-green/red


G2

1-oil temp sensor-green/black.

2-outside air temp-white/red.

3-coolant temp gauge-yellow/red---T14a connector pin 4-purple

9-constant live 20amp to ecu-black(need to fit a pin to g2 plug) ---T6 brown connector pin 4-red/green

10-high oil pressure from switch-yellow.

11-low oil pressure from switch-blue/black.

F

1-starter motor exciter-red/black.

3-alternator ignition trigger-blue.

4-vehicle speed sensor pin 3 earth.

6-reverse switch pin 2-black/red.

7-reverse switch pin 1-black.

(single connector)
W
1-vehicle speed sensor junction-blue/white---T10 orange pin 6-blue/white.

(single connector)
z
1-injectors switched live-red---T14a pin 5 10amp-red/purple.




T10W -White connector
pin 4 - white/red to clutch pedal switch (Clutch pedal switch in car)-using vw brake switch
other side of terminal to earth


Diag port;
Pin 4; earth.
Pin 7:T10 Orange pin 1 - grey/white.
pin 16; fused switched live .
Pin 10; battery live.

 

Yes sorry the T6/4 is run direct to the rear of the fusebox with a 20A fuse (so I didn't have to fit a pin to the plug).

I have a 30 relay in slot 3.

 

I've fixed it! Don't ask me how but I'd somehow managed to get the relays the wrong way round in the black box in the engine bay.



Now running perfectly.

 

Just ripped all my loom out of my mk3 ibiza cupra ayp and have done all the usual n80. n249, n112, power steering pump sensor sai pump and wiring just capped the power to it. And decided stupidly that I should rip all the other stuff I don't need out of the wiring like fog lights, radio, fag lighter, abs, airbag, central locking, rear wiper, heating and electric windows, interior lights and some others I've left out.
Could I just remove these from the loom by just cutting them back and removing the wires from the back of the fuse box where possible or am I asking for trouble in doing this?
The car is solely going to be used on track days but I do plan on on occasionally use it on the road.

 

That's great news then and could I also chop the plug off the that goes to the fusebox on top of the battery and then I'd need to lengthen is the live wire for the fans (red/black wire) and also lengthen the other wire that goes from the fuses to the fan box switch thing. I'm moving the battery inside the car.
Could you tell me could I also lose the alarm siren from the loom? Also the plug that I'm sure is something to do with the sensitivity of the alarm it's a push plug and found on the rear interior lower 1/4 panel drivers side can't think what it's a called.

Would I need any other tools other than the laser 3932 tool modified like yours rub johny? Also want a decent crimps for doing oem fittings if anyone can guide me?

 

Thanks again for the reply rub johny I would like to keep the fuse box behind the dash and trying to keep the wires in the bay to a minimum at the same time aswel aswel as modify my loom for a wideband conversion which I bought and is giving me a headache haha, I would rather pull the wires at the fusebox and keep it oem and run new copper up to the fans as its only 1 wire i think from memory red/black wire and keep it all oem ish.

 

dose anyone have a pin out for a ibiza cupra throttle pedal potentiometer, im trying to use one for a me7.5 conversion but the plug is different to the ecu loom i have

 

hi has anyone got any idea why my r32 t14a loom plug hasn't got a pin5 on the harness side ? help would be appreciated think i may of traced this back to why my car won't run and fuel pump not running

on the spliced side of the t14a i have pin 5 going back to z1 as it should but obviously now this doesn't make it way to where it should and no pin 5 on the other side

any help would be appreciated

Paul