Hello people, i have just done a full rewire of my RS turbo (yep crazy) and am a little stuck with the coolant sensors on the rear inlet manifold, on the wiring diagrams it doesnt say which is which like the yellow one etc so just wondering which goes to which ECU. I know 1 goes to 1 ECU and one goes to the other which goes to which please ????

Hope you can help me thanks for your time

 

spacer on back of engine has 2 sensors
brown and yellow
brown plug = black yellow / brown white is thermo time switch,

yellow plug = brown green to pin 21 black box

brown wire shares an earth with the aux-air device

the other engine coolant temperature sensor is for silver ecu
from what I can make out it maybe located on the thermostat housing
it certainly uses the same shaped plug as the sensor on thermostat housing on the s2
this is how I read the manual for s2 rs turbo

if it don`t make sense pm your number and I`ll call you

 

Cool i have the wiring diagrams etc but wasnt clear which sensor when to which ECU etc the yellow was the main concern so if thats the one to the black fuel ECU thats cool and can trace and scope it.

I understand the thermo time switch but there is another coolant one round the back near the dip tube but a round plug which was coolant to so maybe got them 2 wired wrong as missing like hell when revving it arrrrrrr

 

black box to yellow plug , yeah

 

Thanks dude will scope the bugger make sure its all good thanks