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

So I was in the garage again today checking my wiring I have continuity from the sensor plug to the fusebox but if I jump the terminal on the plug the clocks still don't move pin 9 is earthed I changed the fusebox over swapped the clocks over and still nothing I'm at a loss really. And also all the engine bay wiring is on a permanent live rather than switch live and so is my radio not sure how that has happened any advice would be much appreciated thank you

 

hi people, hope some one might be able to help me out, i have put a auq engine in a non vw vehicle and need to know what wires to live and earth to get the motor running, i think i have the ones from the brown plug right but not sure what to do with the purple t14a? plug, also do i have to run the fuel pump from the ecu or can it be run standalone?

thanks

 

thanks alot!!!! that made much more sence to me lool, all runing now, thanks again

 

Thanks for the help rubjonny but I'm still having issues I checked for continuity from the coolant plug and g2/3 and it's all good I think it was 0.02 ohms of resistance I loop 2/4 still no joy pin 7 and 9 on the t14a are both linked together and earthed on the body I did try putting a negative from the batter to the coolant sensor and still nothing I think it has to be something stupid that I have missed but I just can't work it out

 

Hi there ,
Im having an issue with my fuel pump relay. T6 brown / 2 purple white is not a good ground enough to click the relay. When i jump pin 86 on the relay to ground , my fuel pump relay clicks. I was wondering which ground the ecu harness needs. I might have also a short to ground. T6 brown /1 /2 /4 are wired and thats pretty much it. Any ideas ?

 

Edit : i am using a generic relay. Not a 60/80 or some sort of vw fuel pump relay. Might be the problem.

 

Yeah I messed up my writing , Purple White is already on 85 and 86 to ignition live. My relay has a bult-in LED ( probably pinned on 87a ) which lights around 1% of its brightness because it is not grounded properly. When I take a multimeter and test for continuity on purple white and the negative terminal and I turn the ignition on , I get continuity which is fine. Still the relay won't turn on.

There is only one ground on the main harness right ? It's a round spade connector near the ECU connector. If so , even when that cable is disconnected ( not grounded ) my harness is still grounded. That's the reason I think I have something sorted on ground or some sort.

Might be hard to understand

 

My last concern is T6/1 and T6/4 which are related to the ECU Relay. What is the ECU relay, is it on the main harness ?

Right now T6/1 is on ignition live and T6/4 is a permanent live but they are not on a relay or what so ever

 

The engine is a AWP and it's the ECU that came with the car.

I might just end up by using a relay with a on/off switch and not using the ECU.

ECU is working because I can scan it with a OBD2 scanner

 

Right ! Is it bad if I don't use purple/white from Brown plug to fire the fuel pump relay. I use simply use a ignition live switch + a safety switch to shut it off or on. Everything is working fine , OBD2 is reading juste fine , but I'm still having problems with the 409 relay.

 

Hey Rubjonny ,

My swap is done , but car won't start :'( . Fuel pump is working fine , car is cranking but no spark. Spark plugs are fouled with fuel so injectors are working. I scanned a code : P0688 which is related to ECU ( open relay ? ). The ecu relay is the one next to the SAI relay 100. Currently there is a 167 relay , I have heard that AWP OEM is running a 428 and not a 167 ECU relay.

I have also tested my Coil loom : Pin 1 , Nothing ( should be 12v ) Pin 2 earth , Pin 3 ( trigger ? ) Pin 4 earth.

I think I'm on a good way to find the solution soon !

 

167 and 428 have the same pinout. I removed the 167 and placed a 428 and the car started immediatly. Idles great and runs great , RPM is working , speedo is working , OBD2 is working. God this is a great feeling !

Thanks a lot for the tips RubJonny !!

 

right bit of a strange one, iv got a auq in and fitted, all running, but i have a rev limit which i believe is due to vss, the engine is not in a vw and dose not have vw clocks, i am running a 6 speed seat gearbox with the speedo sensor in it, is there anyway i could get vss from that to the ecu?

thanks