System Description (With Automatic Air Conditioner)

SYSTEM

COOLING FAN CONTROL : System Description (with automatic air conditioner)


SYSTEM DIAGRAM







SYSTEM DESCRIPTION

ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
Cooling Fan Operation





Cooling Fan Relay Operation
The ECM controls cooling fan relays through CAN communication line.