coolant temp sensor
- Thread starter SAYWHAT
- Start date
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I can not locate it at rear of engine (firewall end of engine). Have read another post that says there are two sensors, one digital for ECM readings and another one which feeds the analog dash temp gauge. Have found what appears to be a temp sensor at front of engine (radiator end of engine) passenger side of radiator hose with 3 wires , possible it is the digital one.
gamefreakgc
Elite Member
I've not yet replaced or worked on my ECT sender gauge, but it's on the back of the engine on the passenger's side, I believe.
FSM Zip File for Download (23.6 MB)
The link provided is from the 3rd Gen documentation page (might want to save it).
Look at pages 1507 and 1520 and in between for info on how to replace the ECT sender.
FSM Zip File for Download (23.6 MB)
The link provided is from the 3rd Gen documentation page (might want to save it).
Look at pages 1507 and 1520 and in between for info on how to replace the ECT sender.
gamefreakgc
Elite Member
Hmm, well try this then, it's the link to the Documentation list. You'll see the FSM link near the top of the post.
http://www.toyota-4runner.org/3rd-gen-t4rs/69744-3rd-gen-faq-tutorials-documentation-reference.html
LittleCaesar
New member
Here is what you need to be looking for:
OleMissRunner
New member
Replaced mine a few months ago....just a little bit of a pain, but not too awful. Picked the new sensor up at my local dealer for about $45. As I recall, you have to disconnect your rad. hose, remove the front "3400" engine cover, and then remove the fuel jumper rail. Basic socket set (make sure you have a 19mm socket!), a torque wrench, and your hand tools will get it done in an hour or less....biggest two things are 1) to make sure you torque the new sensor to 14 ft/lbs and the jumper rail to 25 ft/lbs. and 2) to get new crush gaskets/washers for the jumper.
This also is an excellent time to change your coolant :biggrin1:
Edit: Also...while not necessary, a set of crow's foot wrenches will be a huge help. I picked up a cheap set from Harbor Freight just for the job. I thought they'd be a one-use thing, but they've actually been handy for several applications.
This also is an excellent time to change your coolant :biggrin1:
Edit: Also...while not necessary, a set of crow's foot wrenches will be a huge help. I picked up a cheap set from Harbor Freight just for the job. I thought they'd be a one-use thing, but they've actually been handy for several applications.
Last edited:
found it
FSM lists 2 sensors, one is located at front of engine next to the fuel rail cross overpipe ,this one goes to the computer.The second one tells the dash gauge the temperature, location not supplied by FSM.It indeed is at rear of engine as some have correctly implied,the main engine wiring harness is directly over it and surrounded by heater hoses and vacumn lines.I have only seen it thru a mirror! Thanks for the help
FSM lists 2 sensors, one is located at front of engine next to the fuel rail cross overpipe ,this one goes to the computer.The second one tells the dash gauge the temperature, location not supplied by FSM.It indeed is at rear of engine as some have correctly implied,the main engine wiring harness is directly over it and surrounded by heater hoses and vacumn lines.I have only seen it thru a mirror! Thanks for the help
OleMissRunner
New member
If I remember it correctly, I had to use a size 19(?) deepwell socket when I changed mine.
Doc2012
Senior Member
Pretty sure you're talking about the front sensor.
The rear sensor should be a 12 or a 14mm.
And, it can be taken off with a deep well.
