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Fast Idle Valve <--> [Auxiliary Air Valve (Idle Speed)] > < Electrical Specifications|Page 2776

Civic L4-1493cc 1.5L SOHC (16 valve) (1993)

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Intake Air Temperature Sensor: Description and Operation

PURPOSE

The Intake Air Temperature Sensor is a temperature sensitive resistor (thermistor) which is mounted in the intake manifold to monitor intake
charge temperature. 

OPERATION

Thermistor resistance decreases as the intake air temperature increases. This signal is used by the Engine Control Module (ECM) to determine
intake air density (oxygen content) for mixture control.

Fast Idle Valve <--> [Auxiliary Air Valve (Idle Speed)] > < Electrical Specifications|Page 2776