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Home >> Subaru >> 1995 >> Legacy Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Vehicle Speed Sensor (VSS)
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Vehicle Speed Sensor (VSS)

ECM supplies voltage to one side of a reed switch located in speedometer. Speedometer cable revolution opens and closes reed switch, providing ECM with continuity/no continuity input. ECM interprets this signal as vehicle speed.

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