EV1
Active member
I hope you realize that the coolant pump(s) can operate at more than 1 speed. I don't know if it's completely variable, but you can hear it spinning down from a higher RPM when you brake pretty firm from, say, 120KM/H (80MPH) to a stop. At least on my 2012.
It seems the coolant pump's RPM varies with the tractionmotor RPM. (which itself is pretty strange behaviour)
You can also hear the pump spinning at a higher RPM when you turn off the A/C and after some time the fan(s) stop spinning, the pump is still spinning at a higher RPM. (I often had those sounds(fans/pumps) mixed up, until I looked and listenend in the engine compartment.)
It is always at the lowest RPM when A/C is off and car is not moving.
Could it be that your pump is always running at it's maximum RPM?
greetings, EV1
It seems the coolant pump's RPM varies with the tractionmotor RPM. (which itself is pretty strange behaviour)
You can also hear the pump spinning at a higher RPM when you turn off the A/C and after some time the fan(s) stop spinning, the pump is still spinning at a higher RPM. (I often had those sounds(fans/pumps) mixed up, until I looked and listenend in the engine compartment.)
It is always at the lowest RPM when A/C is off and car is not moving.
Could it be that your pump is always running at it's maximum RPM?
greetings, EV1
