Temp readings are from ECT (engine coolant temp sensor) Pressures are from A/C pressure transducer
Fan low speed 104 C (220 F) 1,724 Kpa (250 Psi)
High Speed 110 C (230 F) 2,068 Kpa ( 300 Psi )
Fan turns off at 101 C (214 F ) or when Pressure drops below 1,710 Kpa (241 Psi ) Low speed is at 30% speed and will increase from 31% up too 100% duty cycle depending on the temp or pressure inputs.

Transducer Voltage 0 Volts = transducer faulty or no voltage from PCM
.150 to .450 volts = Transducer Good/low pressure cut out condition
.451 to 4.519 volts = normal operating condition
4.520 to 4.850 volts =Transducer good High pressure cutout condition
5 volts = Transducer Faulty
Wire Colors Dark Blue = Switch output to PCM
Violet/ White tracer = 5volt supply from PCM to transducer
Black/ Lt Blue tracer = sensor ground
Hope this helps and clears up some problems for those trying to fix fan and A/C problems. Hope it makes sense.
Fan comes on with gauge at approx. 9/16 to 5/8 gauge reading.

And if we had a moderator it could be a sticky or permanent file at the top of the forum. Thanks for the info.

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