Vehicle Speed Sensor: Description and Operation

CIRCUIT OPERATION
The Powertrain Control Module (PCM) supplies 5 Volts to the vehicle speed sensor on circuits T33 and K7. Circuit T33 connects to circuit K7. Circuit T33 connects to cavity B31 of the PCM.

Circuit G7 from the vehicle speed sensor provides an input signal to the PCM. The G7 circuit connects to cavity B27 of the PCM.

The PCM provides a ground for the vehicle speed sensor signal (circuit G7) through circuit K4. Circuit K4 connects to cavity A4 of the PCM.

HELPFUL INFORMATION
Circuit K4 also provides ground for the signals from the following:
- Heated oxygen sensors
- Crankshaft position sensor
- Camshaft position sensor
- Engine coolant temperature sensor
- Intake air temperature sensor
- Throttle position sensor
- Manifold absolute pressure sensor
- Vehicle speed sensor