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Home >> Infiniti >> 2023 >> QX55 Essential >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (1 Of 3) >> System Description >> System >> Cooling Fan Control >> System Description >> System Diagram
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System Diagram

GNSDB38207Courtesy of NISSAN NORTH AMERICA, INC.

Component parts

Function

Crankshaft position sensor

Crankshaft Position Sensor 

Exhaust Camshaft Position Sensor

Exhaust Camshaft Position Sensor 

Engine coolant temperature sensor 1 and 2

Engine Coolant Temperature Sensor 

Refrigerant pressure sensor

Refrigerant Pressure Sensor 

Battery

ECM receives the battery voltage signal.

Combination meter

ECM receives the vehicle speed signal via CAN communication.

A/C auto amp.

ECM receives the A/C ON signal and blower fan ON signal via CAN communication.

ECM

ECM 

IPDM E/R

ECM transmits the cooling fan control signal via CAN communication.

Cooling fan control module

Cooling Fan 

Cooling fan motor