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Well I ran the entire tank with no pulse and glide, and so the temperature sensor was down.
The fans are on when it's not hot, but I can't tell if it's speed related (i.e. if I am idle and barely moving the fans come on).
I realise I need numbers to discover the temperature that is being seen, but I've only just got a circuit together that can talk the proprietary Mitsubishi Protocol (OBDII isn't supported).
It appears I can get the temperature of the coolant from that.
I figure we should change the control of the fans and replace the Mitsubishi fan controller with my own (using an arduino). I know the thermostat opening temperature is 82 deg C.
I know it's fully open around 12 deg C above that.
I know the fans must run when the thermostat is open.
The fans I don't believe (am I wrong?) should not be running, if the thermostat is closed* - but they appear to be (see this is why I need the coolant temp and fan running status - to prove they run needlessly).
* - Except when the A/C signal is on for condensor reasons, but I don't normally use A/C.
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