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Home >> Oldsmobile >> 1985 >> Calais Base, 2.5 U, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Single Unit TBI >> Operation >> Data Sensors >> Vehicle Speed Sensor (VSS)

Vehicle Speed Sensor (VSS)

This sensor is mounted behind the speedometer in the instrument cluster. It provides the ECM with pulses to determine vehicle speed. This information is used by the ECM to control the IAC motor.

NOTE: The vehicle should not be driven without the vehicle speed sensor installed.