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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

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Old 10-03-2008, 02:51 PM   #1 (permalink)
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intake air temp sensor

hey guys.
quick question, 91 4runner, 3VZE have searched but cant seem to find anything, as well in the manual i downloaded from the sticky

where on earth is the air intake temperature sensor? and how do i test it.. code 24 i believe.. as well whichever code for coolant temp sensor but i got that one covered.. please help! my search for my terrible idle is seemingly coming to an end! haha me---> toyota
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Old 10-03-2008, 03:09 PM   #2 (permalink)
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anyone at all?
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1991 Toyota 4Runner SR5, Daily Driven Toy
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31X10.50-15's
Negative 25 MPG
289,000km
Idles at 1700rpm, thats 1 Rev per heep devoured:)
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Old 10-03-2008, 03:10 PM   #3 (permalink)
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im not sure that there is an "air intake temp sensor"
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Old 10-03-2008, 03:14 PM   #4 (permalink)
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really? because jumped te1 and e1 terminals and came up with code 23/ 24 which is intake air temperature sensor/ intake air temperature circuit
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1991 Toyota 4Runner SR5, Daily Driven Toy
3VZE, IFS, AUTO
31X10.50-15's
Negative 25 MPG
289,000km
Idles at 1700rpm, thats 1 Rev per heep devoured:)
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Old 10-03-2008, 03:23 PM   #5 (permalink)
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Intake air temp sensor is the little white probe sticking down into the AFM.It will be on the intake tube side,(have to pull the AFM off) measures the temp of the air that is coming through the AFM....can be cleaned with electrical contact cleaner...if the problem persists, more than likely the AFM is bad. The wires that connect to it go through the main plug that is connected to the top of your AFM.
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Old 10-03-2008, 03:27 PM   #6 (permalink)
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AFM? air flow meter? maybe haha
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1991 Toyota 4Runner SR5, Daily Driven Toy
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31X10.50-15's
Negative 25 MPG
289,000km
Idles at 1700rpm, thats 1 Rev per heep devoured:)
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Old 10-03-2008, 04:40 PM   #7 (permalink)
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Quote:
Originally Posted by ontario4runner View Post
really? because jumped te1 and e1 terminals and came up with code 23/ 24 which is intake air temperature sensor/ intake air temperature circuit
I stand corrected... just chalk it up to being a noob!!
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Old 10-03-2008, 04:55 PM   #8 (permalink)
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Use an ohm meter and test out your AFM. It takes all of 10 mins to do, if the air temp sensor is wired into it, you will be able to find out the problem.
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Old 10-03-2008, 05:09 PM   #9 (permalink)
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Quote:
Originally Posted by Jay351 View Post
Use an ohm meter and test out your AFM. It takes all of 10 mins to do, if the air temp sensor is wired into it, you will be able to find out the problem.
http://www.ncttora.com/fsm/1993/engine/92volumeai.pdf

I never heard of a temp sensor, so it must be part of the AFM. Here is how to test it.
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Old 10-03-2008, 05:23 PM   #10 (permalink)
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The temp sensor is inside the AFM, if you remove the plastic cover you can get to it and were it plugs in.
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Old 10-03-2008, 05:58 PM   #11 (permalink)
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Quote:
Originally Posted by space-junk View Post
I stand corrected... just chalk it up to being a noob!!

haha its all good! at least you took the time to have a look see, as i said i cant find much on it myself so if it wasent for the code reading i wouldnt have realized it myself!

to everyone else thanks mucho any more info would help greatly

is afm air flow meter?
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Negative 25 MPG
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Idles at 1700rpm, thats 1 Rev per heep devoured:)
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Old 10-03-2008, 06:08 PM   #12 (permalink)
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Yes, Volume Air Flow Meter.
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Old 10-03-2008, 06:12 PM   #13 (permalink)
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awesome, thanks jay.. so the intake air temperature should be located inside of that? or should i be able to see the sensor with the AFM still on?.. i guess tomorow morning i will find out if i get lost ill post some pics
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1991 Toyota 4Runner SR5, Daily Driven Toy
3VZE, IFS, AUTO
31X10.50-15's
Negative 25 MPG
289,000km
Idles at 1700rpm, thats 1 Rev per heep devoured:)
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Old 10-03-2008, 06:25 PM   #14 (permalink)
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not hard and with pics there aint nothing yotatech cant answer.. theres always some bored yota nut on here!
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Old 01-27-2011, 03:53 PM   #15 (permalink)
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Iat

I too am getting a code 24 for the IAT sensor. I just replaced the AFM, but I am still getting a check engine light/code. However, I pull up the replacement IAT sensor at Auto Zone and get a little message that says the sensor cannot be used on pollution controlled vehicles. What does that mean? I just passed smog here in California and won't be due for another 2 years. How am I supposed to change this sensor and get rid of the light/code, if I'm not supposed to use it on pollution controlled vehicles? Anyone have an idea, or is this some stupid California thing. BTW, I have a 1990 4Runner SR5 V6 with a new engine, new everything, new sensors (except the IAT), etc. Any help would be great!!!
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Old 01-27-2011, 04:02 PM   #16 (permalink)
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You can test the sensor:
- http://www.4crawler.com/4x4/CheapTri...tml#AFMtesting

Then see if that AFM signal is getting back to the ECU by testing the ECU connector pins for that same signal:
- http://www.4crawler.com/4x4/CheapTri...roubleshooting
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Old 01-27-2011, 04:02 PM
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