3000GT SL V6-2972cc 3.0L DOHC MFI (1997)
Intake Air Temperature Sensor: Testing and Inspection
OPERATION
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The intake air temperature sensor converts the engine intake air temperature into a voltage and inputs it to the engine control module, which then
corrects the fuel injection rate, etc. based on the input signal.
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The 5 V power in the engine control module is supplied via a resistor in the module to the intake air temperature sensor. Via the sensor which is a
kind of resistor, it is grounded in the engine control module. The intake air temperature sensor resistor has the characteristic of decreasing its
resistance decreases as the intake air temperature rises.
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The intake air temperature sensor terminal voltage increases or decreases as the sensor resistance increases or decreases. Therefore, the intake air
temperature sensor terminal voltage changes with the intake air 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 indicate a temperature different from outside
temperature depending on engine operating state.
