Electric Water Pump Control
WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.
When vehicle is READY, HPCM transmits the activation signal to the electric water pump, activating the pump. It also performs duty control of the drive voltage according to the vehicle conditions, in order to control the operation of the electric water pump and reduce operating noise.
Refer to "HIGH VOLTAGE COOLING SYSTEM ".