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Home >> Nissan-Datsun >> 1973 >> 240Z Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Thermostatic Air Cleaner >> Testing >> Air Cleaner Temperature Sensor

Air Cleaner Temperature Sensor

Before starting test make sure that temperature around sensor is below 86°F. With engine off, make sure air control valve is open to underhood air intake. Start engine and allow to idle. Valve should immediately close to underhood air. Carefully watch valve to ascertain that it gradually begins to open as engine warms up.

NOTE: If ambient air temperature is low, it will take a considerable length of time for valve to begin to open, or, in some cases, it may hardly open. This is to be considered as normal.

Above test may also be performed with a thermometer taped near sensor. In this case valve should begin to open at a temperature of 100-118°F (all except 240 Z & 1200) or 100-130°F (240 Z & 1200). If results of test are abnormal, replace sensor.

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