Cooling Fan Control

Fig 1: DTC P1217 Cooling Fan Control Table

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

*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.

*2: This signal is sent to ECM through CAN communication line.

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 2-step control [ON/OFF].