94 VTI sedan D16y1 plug question

**caljones** · 31-12-2011 12:44 PM

Hey. This is my first post here.
Bought this car three months ago, its great. While fiddling i found a wire that mysteriously stopped in the engine bay, followed it to where it starts and its a plug near the headers. Could someone tell me what it is?

Uploader wasnt really working so i had to embed the images.

edit- its the plug in the middle, the thinner one.

**hmetro24** · 31-12-2011 03:07 PM

Water temp sensor
Clean all this grease, look bad

**bennjamin** · 01-01-2012 07:44 AM

Originally Posted by hmetro24

Water temp sensor
Clean all this grease, look bad

Won't pass rego like that !

Clearly a mild oil leak , clean it up and replace the gasket/grommet

**caljones** · 01-01-2012 03:17 PM

if its the water temp sensor shouldnt the wire actually lead somewhere? instead of stopping two feet away?

**bennjamin** · 01-01-2012 03:21 PM

The ECT that you pictured should lead into the Main wiring harness that sneaks behind the engine and up to under the engine bay fuse box. If its not connected the engine isn't getting a temp readout from the head. You will be showing a minor MIL code , do a ecu test. But otherwise try and find where it has been pulled from and reconnect it

**caljones** · 01-01-2012 03:33 PM

Hey thanks for youy help. Should my temperature guage be working or is that irrelevant to this? because at the moment it does seem to be working..

**bennjamin** · 01-01-2012 07:35 PM

Originally Posted by caljones

Hey thanks for youy help. Should my temperature guage be working or is that irrelevant to this? because at the moment it does seem to be working..

Strange, as this sensor sends directly to the temp gauge. Here is a picture of the unit just to make sure we are talking about the same thing!

http://ucxagw.bay.livefilestore.com/...ing%20unit.jpg

**dorikin** · 01-01-2012 07:39 PM

Yes it should directly affect your Temperature Gauge as it's the Engine Coolant Temp (ECT) Sensor for the gauge unit.

**Banana_hammock** · 01-01-2012 10:27 PM

When I did a head swap I almost broke that sensor trying to get it out of the old head. LUCKKYYYYY

**caljones** · 01-01-2012 10:52 PM

I know the guy before me had to gauges that he took out prior to selling it, he may have messed with the wiring. because I am getting temp readings, where else could this be sending from? Would I have to trace all wires from the fuse box or is there a way of telling which one etc?