Cooling Fan Control

Fig 1: Cooling Fan Control Sensor Reference Chart

Courtesy of NISSAN MOTOR CO., U.S.A.

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

Cooling Fan Operation 

Fig 2: Cooling Fan Operation Conditions Graph

Courtesy of NISSAN MOTOR CO., U.S.A.