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I Am in a automotive class and we have been working on this 2001 Toyota Camary with an Over heating problem. we have found records on what has been replaced in the past and they were Water pump, all 3 temp sensors, cooling fan sensors, and thermostat. the temp gage on the dash has been showing at 3/4 instead of 1/2 (Normal) so we have tryed a NEW radiator thinking the system had a restriction in it but with a new radiator it still overheats. we have GOOD Flow of coolent. when we turn on the heater in the car the temp gage goes down (Cooling the coolent off) the cooling fans come on at the correct temp. we also did an OHMS check on All the sensors and they are Within spct. SO the instructors and us are completly stumped could anyone give us any ideas to try?
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If it’s not overheating then it might just be an issue with the gauge. The only way to know this however is to check the input at the back of the cluster as there could be resistance in the wires going to it. That said you might just check the resistance at the sending unit. IF it’s good then all you need do is check the wiring to isolate the gauge.
update!!! WE fixed it turns out to be the aftermarket temp sensor we put in we baught the genuine toyota temp sensor and it fixed the problem. how we found it was we did a resistance test on the sensor it self and it was otaat spec. thanks for all the help.
I would use a block tester to see if head gasket leaks. have you tried taking the temp with a gauge or something not in the car. or a point and shoot temp gun to confirm the dash gauge is working right.
[i][quote=”Skippy55008″ post=41109]update!!! WE fixed it turns out to be the aftermarket temp sensor we put in we baught the genuine toyota temp sensor and it fixed the problem. how we found it was we did a resistance test on the sensor it self and it was otaat spec. thanks for all the help.[/quote]
[/i]Thanks for letting us know how it turned out, I was wondering what you found.
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