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

1989 codes - 22 and 51

Old Sep 25, 2018 | 07:41 PM
  #1  
Jasmyn825's Avatar
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1989 codes - 22 and 51

hey y’all,
ive got the codes 22 (temp sensor) and 51. I’m a little unclear on what’s triggering the 51 and how to deal with it. 51 can be the air condition or the throttle position sensor. I literally just changed my sensor. And did a lot of through checks to make sure it was placed right-and it stoped the surging idle that I was having.
22 makes sense because the pigtails to my coolent temp sensor had a broken wire so I just attached them straight to the other end of the connector while I order a new one- only found a new on amazon-
https://www.amazon.com/NewYall-Coolant-Cooling-Temperature-Connector/dp/B07GBSG7V7?keywords=89+4runner+temperature+sensor+connector&qid=1537886147&sr=8-1-fkmrnull&ref=mp_s_a_1_fkmrnull_1 https://www.amazon.com/NewYall-Coolant-Cooling-Temperature-Connector/dp/B07GBSG7V7?keywords=89+4runner+temperature+sensor+connector&qid=1537886147&sr=8-1-fkmrnull&ref=mp_s_a_1_fkmrnull_1
. Just in case anyone is looking for it. Anyway, fixing that as soon as I get it. Meanwhile I also changed that sensor and it’s still reading the temp even though the connection is not ideal.

but 51?? What could that be? I’m not even sure what the throttle position sensor circuit is, and the manual is being extremely unhelpful.
Also if just came on not long ago, and the air conditioning has never once worked. It’s the old R-12 system and forget changing that over. I can live without it.

Thiughts? Advice on what to check and how?
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Old Sep 25, 2018 | 08:57 PM
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https://www.yotatech.com/forums/f116...er-tps-305747/

Just add info to the thread you started a few days ago. Otherwise, you’re tracking two of your threads, trying to resolve the same issue.
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Old Sep 25, 2018 | 09:19 PM
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Solid point.
Thought I might get more answers this way, but your probably right.
Originally Posted by mholme
https://www.yotatech.com/forums/f116...er-tps-305747/

Just add info to the thread you started a few days ago. Otherwise, you’re tracking two of your threads, trying to resolve the same issue.
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