Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Vehicle Speed Sensor: Description and Operation

PURPOSE AND OPERATION
The vehicle speed sensor provides road speed data to the electronic control unit (ECU). The ECU in turn detects vehicle movement from the road speed input and ensures that idle speed control mode is disengaged. Should the vehicle speed sensor fail in service, the ECU idle speed control would become erratic.

The vehicle speed sensor also provides road speed data to the electric speedometer and cruise control ECU.