Vehicle Speed Sensor (VSS)

Operation

The vehicle-speed sensor is incorporated within the speedometer; it converts vehicle-speed data to pulse signals and inputs those signals to the engine control module. The engine control module, based upon those signals, regulates the idle-speed control motor, etc.

The vehicle-speed sensor, by intermitting by the reed switch the flow (to ground) of the approximately 5V voltage applied from the engine control module, produces vehicle-speed signals.

Troubleshooting Hints

If there is damaged or disconnected wiring, or a short-circuit, of the vehicle-speed sensor signal circuit, the engine may stall when the vehicle speed is reduced and the vehicle is stopped.








Harness Inspection


VEHICLE SPEED SENSOR CHECK
Refer to Meters and Gauges.