I've been cleaning up/checking out an imported s5 t2 engine I received and can't for the life of me recall what this connector is. I can't find it in the FSM either. JDM motor and harness and it's behind the alternator, sitting just above the turbo oil feed line, in front of the throttle body.

 

Don't know, but i do know you don't need it..
I had this lying around aswell (euro FC) and took it out when i simplified the wiring.

 

I think it connects on the back of the water pump housing.

 

Not sure, but I have that too... nothing that matches it on the other end of the harness..

 

its not connected to the harness. Its connected to a sensor that is on the water pump housing.

 

Ive never seen that sensor on any fc i worked on..

its not the watertemp sensor for the ecu, so what does it do for the cars that actually have this sensor?

 

I am not exactly sure to tell you the truth but both of my 91 TIIs have that sensor. One fc is a JDM one and the other one is UK euro spec. It looked like a temp sensor if i remember well last time i removed it to check. I do not think my 87 TII that was a US spec had this when i was a student in the US.

 

Interesting... Thanks all!

 

I think that temp sensor turns on the front factory electric fan than is on the AC condenser when it reaches a certain temperature.