92 Paseo whacking out

Tiny
STRAYT_SHOOTER
  • MEMBER
  • 1992 TOYOTA PASEO
  • 4 CYL
  • FWD
  • AUTOMATIC
92 Toyota Paseo AT- my sister's car, always starts and runs great. Until. When she is going down a long hill about 5-miles from home the temp guage drops and pegs out cold and by the time she gets to bottom of hill the tranny downshifts and stays there for 3-4 miles (revving engine the whole way unless she really slows down) then temp guage goes back up and tranny upshifts and all is fine? It has done this the same way in same place for months, and it seems to happen on cold or cooler days, rarely on warm days. Temp sensor?
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Tuesday, November 16th, 2010 AT 5:19 AM

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Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Have you tried to retrieve for trouble codes?

I am not able to post diagrams now so just in case you need to know the terminal location, terminal TT is 6th pin from left, lowest row.

To check transmission codes, bridge TT with E1, E1 being the top red spot as shown in diagram in following link which explains how to retrieve trouble codes.

https://www.2carpros.com/articles/toyota-trouble-code-definitions-and-code-gathering-method-1990-1995

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Tuesday, November 16th, 2010 AT 12:02 PM
Tiny
STRAYT_SHOOTER
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  • 2 POSTS
I have not tried yet, thought there might be a chance someone would have a quick and easy answer. I will try to get to checking the codes over the next weekend or two. Thanks
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Thursday, November 18th, 2010 AT 3:46 AM

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