TwinTurbo.NET: Nissan 300ZX forum - The ECCS controls the fan relay
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Subject The ECCS controls the fan relay
     
Posted by compirate on June 18, 2018 at 12:02 AM
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In Reply To Thanks. posted by Zluster on June 17, 2018 at 11:25 PM
     
Message Does the fan work normally when the engine gets hot?

When the air conditioner is off, the fan runs if the coolant temp is above 221 F.
If the A/C is on, it runs if the coolant temp is above 203 F up to 25 MPH, and 221F over 25MPH.

EC-296-310 for diagnostic procedures. Says to put a 150 Ohm resistor across the connector for the coolant sensor and see if the fan runs.

The good old days there was a pressure switch in the high line, when it got over a certain pressure, the fan came on.

     
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