Description And Operation: Description

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Component location: Manual transaxle case

Courtesy of KIA MOTORS AMERICA, INC.

Operation principle: Vehicle Speed Sensor (VSS) is hall sensor type and senses the rotating speed of differential gear.

Function

Comparing engine speed with vehicle speed calculated based on vehicle speed sensor signal, ECM recognizes engaged gear.
Based on the information about engaged gear, ECM performs optimum fuel injection quantity correction.
VSS signal is also used in speed meter of cluster, A/C control module, BCM, etc.