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

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Old 09-21-2011, 09:45 AM   #1
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CEL/3vze codes

CEL came on last night, so I pulled the codes this am...
22, water temp sensor....prety self exlanatory
24, intake air temp? didn't think there was an intake temp sensor?
31, manifold/airflow meter

Any ideas?
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Old 09-21-2011, 09:57 AM   #2
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Check the FSM.

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Old 09-21-2011, 12:30 PM   #3
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Here's a link to the codes:

http://www.4crawler.com/4x4/CheapTri...es/index.shtml

My initial theory? Dead vane air flow meter. There IS an intake temp sensor, but it is part of the VAFM, not serviceable, and not replaceable. When you get the airbox off, you'll see a little black sensor at the 12:00 position on the outboard opening of the intake forward of the vane itself.

Last edited by ToyotaViejo; 09-21-2011 at 12:32 PM.
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Old 12-04-2012, 07:56 AM   #4
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Ever get any resolution on this? I have the same codes 24 & 31. I know what they are and have an idea where to start looking, but it would be great to hear whether you got this resolved.
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Old 12-04-2012, 10:25 AM   #5
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http://personal.utulsa.edu/~nathan-b...33volumeai.pdf
If you get both codes at the same time, I would suspect the wiring.

But run the diagnostics; then you'll know for sure.
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Old 12-04-2012, 10:25 AM
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12, 14, 21, 25, 3vze, 42, air, cel, code, codes, diagnostic, flow, meter, pdf, toyota, yotatech

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