Johann Posted March 19, 2008 Report Share Posted March 19, 2008 Radiator fan connected to Aux output 7. Temperature on set to 92 degree C, hysteresis 4 degree, polarity low. Car powered Ign. swith pos 2, engine not running, fan is off. When changing polarity to high fan goes on but is set to low. When powering down the ECU the fan goes on... This would suggest the ECU is driving to ground when power is off, this isn't the way it should behave is it? Quote Link to comment Share on other sites More sharing options...
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