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Home >> Mercedes Benz >> 1992 >> 400E >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> LH-SFI System >> Coolant Temperature Sensor
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Coolant Temperature Sensor

Coolant temperature sensor is a Negative Temperature Coefficient (NTC) type sensor. As sensor temperature increases, resistance decreases. Coolant temperature sensor converts engine coolant temperature to a voltage signal. The LH control unit uses engine coolant temperature to control fuel injection duration. See Figure .