Speedometer Head: Testing and Inspection
SPEEDOMETER CHECK1. Assure tire pressure at standard value.
2. Set the vehicle on a speedometer tester.
3. Set free rollers securely on the floor according to the wheelbase and rear tread of the vehicle (when rear wheels are to be set on free rollers).
4. Raise the rear wheels on a jack and place rigid racks to support the specified positions of the side sills (when rear wheels are to be raised on a jack).
5. Make sure the parking brake has been set.
6. Attach anchoring bars on the tie-down brackets and secure their ends to the anchor plates.
7. Make sure the tension on the right and left bars is the same. Also be sure there is enough tension on each bar.
8. Attach a chain or wire to the rear tie-down hole. Make sure the end of the wire or chain is secured firmly.
9. Take all other necessary precautions.
10. Use a speedometer tester to measure the speedometer's indication error.
Standard value:
CAUTION: Do not operate the clutch or accelerator abruptly or decelerate during the operations.
11. If not to the standard value, inspect for proper tire size. If not correct, replace tires with original size tires and retest. If correct, replace the speedometer. If still not to standard value, replace vehicle speed sensor.