TOM WALKER wrote to ROY WITT:

 RW> RW>>> Mine says the same thing. It even has 4 stages of procedures to
 RW> RW>>> check the AC system. However, it doesn't have a procedure to
 RW> RW>>> check out why the radiator fans don't engage as the engine
 RW> RW>>> temps get higher than normal operating temps when the PCM
 RW> RW>>> detects that the system is low on freon.

 RW> TW>> Since the Engine temperature function has priority so the fans
 RW> TW>> should have run in high speed. Since it did not it indicatas
 RW> TW>> either a bad engine block sensor, a problem with one of the
 RW> TW>> Relays, or an unusual problem with the vehicle speed input to
 RW> TW>> the PCM.

 RW>> Since all of it works as designed with a full load of freon, I have
 RW>> my doubts about your diagnoses.

 TW> Doubt al you wabnt. But the Circuit was designed so the Engine Bloc
 TW> kTemperasture has Priority and should always run the fans no mater
 TW> what the other sensors dictated.

 TW> IF the Fans did not run when the engine cooling water reached the Set
 TW> Temp for fan activaqtion there WAS a fault in the system

Lemme put it this way; if your scenario were true, there would be a fault
code in the PCM...there is none.


         R\%/itt


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