Where is the ECT sensor located? I'm not able to find any useful information.

There is a coolant pipe that runs between the two cylinder heads at the back side of the engine. The ECT screws into this water pipe from the top.it's right above the thermostat housing...There are two temperature switches on is for the operation of the temperature gauge and the other switch tells the fuel injection computer the temperature of the engine coolant. The Fuel injected related switch is at the back of the engine (passenger side) It has a light green and red wire and a black wire at the switch. The temperature gauge switch has a single wire on the switch yellow and red wire at the switch.