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Engine control unit connector

9FU0393

OPERATION

The intake air temperature sensor converts the
engine intake air temperature into a voltage
and inputs it to the engine control unit, which
then corrects the fuel injection rate, etc_based
on the input signal:

The 5 V power in the engine control unit is
supplied via a resistor in the unit to the intake
air temperature sensor:Via the sensor which
is a kind of resistor; it is earthed in the engine
control unit: The intake air temperature sensor
resistor has such characteristic that its
resistance decreasesasthe intakeair
temperature rises_

The intake air temperature sensor terminal
voltage increases or decreases as the sensor
resistance increases or decreasesTherefore
the intake air temperature sensor terminal
voltagechangeswiththeintakeair
temperature , decreasing as the temperature
rises

TROUBLESHOOTING HINTS

The intake air temperature sensor senses the
intake air temperature in the air cleaner SO that it
may indicatea temperature different from outside
temperature depending on engine operating state_

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