3.4l efi engine coolant temp sensor location...

Just spent 4 hours reading, searching: nothing definitive! I am interested in the sensor that sends the ecu temp info for fuel injection. It's either at the back, or front, depending on the thread ;-] I'm leaning to the back, due to BamaToy's info on a 2.7, but I would like a definitive answer for the 3.4l! I will throw back a cool one in honor of the one who comes up with the location!!

 

around the thermostat housing?

 

There are two sensors for ECT on most Toyota trucks. One will have either a single wire, while the other will have 2 or 3 wires(depending on the model and year). The one with 2 or 3 wires goes to your ECU and is used for engine management. Look around the front top of the engine, driver side, behind the timing cover. It will be there. 2 wires for your truck I believe.

 

For the 3.4, Engine Coolant Temp sender (for ECU) is on the front of the lower intake, blue arrow 2 wires. Engine temp sender for the gauge is at the rear, red arrow 1 wire.

 

Thanks to you gents for clearing that up! That will be 2 cool ones raised ;-]

 

Would either one of these sensors be able to send a signal to an electric fan controller to engage the fan?

 

What are the part numbers for each?

 

@gunny1005

 

ECT sender, I do believe.

 

Right, that's the one for the gauge like the red arrow points to in the pic above.

 

I remember being confused, as to removing the white plastic piece--it looks like it would be squeezed or something for removing. Nope, it just slides up and off.

 

lol when I took out my engine that was the last connector I had to remove and I probably spent 10 minutes trying to unclip it lol