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#1
06-24-2008, 09:23 PM
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Radiator Fan & A/C Pressure Transducer
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. Last edited by jpb53; 09-29-2008 at 07:16 PM. Reason: didn't work the way I wanted 
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#2
06-25-2008, 03:41 AM
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Re: Radiator Fan & A/C Pressure Transducer
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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**We took the time to answer your post. Please give us some time and post the fix. It will help hundreds. **Follow prescribed safety practices before attempting any procedures. Doubts? Consult a maintenance manual. 07 Fusion / 06 RAV4 / 06 Accord / 96 Gr Caravan
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