Speedometer Head: Testing and Inspection

1. INSPECT SPEEDOMETER ON-VEHICLE
Using a speedometer tester, inspect the speedometer for allowable indication error and check the operation of the odometer.

HINT: Tire wear and tire over or under inflation will increase the indication error.

If error is excessive, replace the speedometer.





2. INSPECT No.1 VEHICLE SPEED SENSOR
a. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2.
b. Connect the positive (+) lead from the tester to terminal 3 and the negative (-) lead to terminal 2.
c. Revolve shaft.
d. Check that there is voltage changer from approx. 0 V to 11 V or more between terminals 3 and 2.

HINT: The voltage change should be 4 times per each revolution of the No.1 vehicle speed sensor shaft.

If operation is not as specified, replace the sensor.