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Home >> Mazda >> 1993 >> 626 L4-1991cc 2.0L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Air Temperature Sensor ( Ambient / Intake ) >> Description and Operation
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Air Temperature Sensor ( Ambient / Intake ): Description and Operation

Intake Air Thermosensor:






PURPOSE
Measure temperature of intake air and provide PCME with signal used in regulating fuel injection quantity, idle speed, and ignition timing.

LOCATION
Top air cleaner housing.

OPERATION
Thermosensor is a negative temperature coefficient thermistor. This means as temperature increases, resistance decreases. Cold air is more dense than warm air. PCME measures thermosensor resistance via a reference voltage to calculate intake air temperature.

TEMPERATURE / RESISTANCE (K OHMS)

77°F (25°C) / 29.7K - 36.3K
185°F (85°C) / 3.3K - 3.7K
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