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Home >> Nissan-Datsun >> 2009 >> Altima Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction (Except Hybrid - Qr25DE) (Except For CALIFORNIA) >> Function Diagnosis >> Cooling Fan Control >> System Description >> System Description >> Notes

System Description: Notes

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].