Vehicle Speed Sensor
- Connect the positive (+) lead from battery to terminal 1 and negative (-) lead to terminal 2.
- Connect the positive (+) lead from tester to terminal 3 and the negative (-) lead to terminal 2.
- Rotate the shaft.
- Check that there is voltage change from approx. 0V to 11V or more between terminals 3 and 2.
- The voltage change should be 4 times for every revolution of the speed sensor shaft. If operation is not as specified, replace the sensor.