Vehicle Speed Sensor: Testing and Inspection
VEHICLE SPEED SENSOR1. Connect the positive (+) lead from battery to terminal 31and negative (-) lead to terminal 2.
2. Connect the positive (+) lead from tester to terminal 3 and the negative (-) lead to terminal 2.
3. Rotate the shaft.
4. Check that there is voltage change from approx. 0 V to 11 V or more between terminals 2 and 3.
5. The voltage change should be 4 times for every revolution of the speed sensor shaft.
If operation is not as specified, replace the sensor.