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Home >> Nissan-Datsun >> 2007 >> Altima Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction (Qr25DE) (Except For CALIFORNIA) >> Cooling Fan Control >> System Description >> Input/Output Signal Chart
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Input/Output Signal Chart

INPUT/OUTPUT SIGNAL CHART

Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed(1) Cooling fan control IPDM E/R
โ†“
Cooling fan relay
โ†“
Cooling fan motor
Battery Battery voltage(1)
Wheel sensor Vehicle speed(2)
Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch Air conditioner ON signal(2)
Refrigerant pressure sensor Refrigerant pressure
(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.