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Home >> Land Rover >> 1994 >> Defender 90 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 3.9L & 4.2L >> Computerized Engine Controls >> Input Devices >> Vehicle Speed Sensor Buffer

Vehicle Speed Sensor Buffer

The vehicle speed sensor sends a signal to the speedometer in the form of voltage pulses. The pulses are filtered by the vehicle speed sensor buffer. The voltage alternates between battery voltage and 0 volts 6 times per wheel revolution. The speed sensor signal is also sent to, if equipped, the seat belt and speed warning unit, cruise control Electronic Control Unit (ECU), ECM, memory seat ECU and the emission maintenance reminder unit.

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