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Old 06-01-2016, 05:27 PM   #1
SteveMD
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Default E-Fan Issue

I'm working on a car with a non-functioning e-fan. Grabbed another off a '01 V70 and was surprised that it started to spin as soon as I connected it. The ignition was off. I disconnected it until I can find out if that is normal behavior, some kinda brief self test? Anyone know?
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Old 06-01-2016, 07:36 PM   #2
tryingbe
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Stuck fan relay?
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Old 06-01-2016, 07:42 PM   #3
Chrisco
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Not sure what year it started. But e fans will run on a warm engine sometimes on s60/v70s. It shouldn't stay on too long though.
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Old 06-01-2016, 08:09 PM   #4
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Not sure what year it started. But e fans will run on a warm engine sometimes on s60/v70s. It shouldn't stay on too long though.
Cold engine. These fans use a PWM signal from the ECU to activate the fan. Inputs to the fan control module on the fan shroud are positive, negative, and PWM.
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