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1UZ Cold temp sensor issues

yso81g

New Member
Hi lads!

I have a cold temp sensor issue.
On the diagnosis/scanner the temperature decreases with the voltage as the car gets hotter! Yes decreases! I've changed the sensor, run some temporary wiring, & had no luck. For the life of me & many others trying to help solve the problem, it's become a big head scratcher.
Any help or direction on the problem would be so much appreciated!
Cheers lads!
 

George_R

Member
If that's obd1 car (pre - 1998), try different scanner.
Measure voltage at THW pin of the ECU when cold and warmed up to confirm the sensor itself is ok
 
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