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Home >> Infiniti >> 2010 >> M45 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 184 (Engine Control System - Introduction) >> Function Diagnosis >> Cooling Fan Control >> System Description >> Input/Output Signal Chart
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Input/Output Signal Chart

WARNING: This page is about a different car, the 2010 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor Engine speed(1) Cooling fan control IPDM E/R
↓
Cooling fan control module
↓
Cooling fan motor
Camshaft position sensor
Engine coolant temperature sensor Engine coolant temperature
Refrigerant pressure sensor Refrigerant pressure
Battery Battery voltage(1)
Unified meter and A/C amp. Vehicle speed(2)
Air conditioner ON signal(2)
A/C evaporator temperature(2)
Target A/C evaporator temperature(2)
(1) The ECM determines the start signal status by the signals of engine speed and battery voltage.
(2) This signal is sent to ECM via the CAN communication line.
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