Nissan Maxima Service and Repair Manual: Power control system
COOLING FAN CONTROL
IPDM E/R controls cooling fans according to the status of the cooling fan speed request signal received from ECM via CAN communication.
IPDM E/R outputs power generation command signal (PWM signal) to the generator according to the status of the power generation command value signal received from ECM via CAN communication. Refer to CHG-9, "System Description".