‘94 VAF - Replace THA pin or repair IAT circuit? (1 Viewer)

JunkCrzr89

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My ‘94 FZJ80 is throwing code 24 - intake air temp sensor malfunction. I went through the FSM diagnostic procedures for testing resistance and it looks like the THA pin is dead. Resistance between E2 and VS is within spec, but between E2 and THA (the IAT circuit) and between VS and THA I get nothing.

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As you guys know, a new VAF is NLA from Toyota. The only potentially decent replacement option I’ve found is $350 for a “rebuilt” unit from a seller on eBay (possibly junk, I know). However, if these units can be rebuilt, then I would think the dead THA pin in mine could be replaced and/or the connecting circuit repaired. But I also know that removing the two screws to pull the connector off the unit is a can of worms that may lead to a completely dead VAF. So does anyone know if this circuit can be repaired or the THA pin replaced, or should I just go ahead and get the “rebuilt” unit?

Btw - I did search and found a couple of threads but no definitive answer about this (e.g., 93-94 VAF rebuild serivces ? - https://forum.ih8mud.com/threads/93-94-vaf-rebuild-serivces.972184/#post-10808988)
 

Irish Reiver

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I'm pretty sure if you flip the VAF over you can remove the base plate and get access to all the components inside without any of the damage that can done by removing the connector screws. You may find that the THA connector has been broken and is an easy fix...YMMV
 

JunkCrzr89

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I'm pretty sure if you flip the VAF over you can remove the base plate and get access to all the components inside without any of the damage that can done by removing the connector screws. You may find that the THA connector has been broken and is an easy fix...YMMV
Thanks for the suggestion. I’ll check it out.
 

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