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Ron Z.
Ron Z., - Chevy Tech -
Category: Chevy
Satisfied Customers: 17799
Experience:  18+yrs experience. State Inspector and Chevy Diagnostics
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Where is the speed sensor that makes the speed odomiter work

Resolved Question:

where is the speed sensor that makes the speed odomiter work
Submitted: 5 years ago.
Category: Chevy
Expert:  Ron Z. replied 5 years ago.
The Vehicle Speed Sensor (VSS) is a pulse counter type input that informs the PCM how fast the vehicle is traveling. The VSS system uses an inductive sensor, mounted in the tail housing of the transmission, and a toothed reluctor wheel on the tail shaft. The teeth of the reluctor wheel alternately interfere with the magnetic field of the sensor creating an induced voltage pulse as the reluctor rotates.

The VSS produces an AC voltage signal that increases with vehicle speed. The PCM processes this signal and sends it to the following components:
  • The instrument panel
  • The body control module
  • The radio
  • The cruise control module


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