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Home >> Nissan-Datsun >> 2014 >> Versa Note S Plus >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Introduction) >> System Description >> System >> Cooling Fan Control >> COOLING FAN CONTROL: System Description >> System Description (M/T Models)
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System Description (M/T Models)

ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control system has 2-step control [HIGH/OFF].

Cooling Fan Operation

Fig 1: Cooling Fan Vehicle Speed Graph
G08199476Courtesy of NISSAN NORTH AMERICA, INC.

Cooling Fan Relay Operation

The ECM controls cooling fan relays through CAN communication line.

Cooling fan speed Cooling fan relay
Stop (OFF) OFF
Operate (HI) ON
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