Calibration Test
Ensure tire pressure is at proper level. Using a reliable speedometer tester, compare reading on vehicle speedometer to reading on speedometer tester. See SPEEDOMETER ALLOWABLE VARIATION
. If reading on vehicle speedometer does not fall within acceptable range, replace speedometer.
SPEEDOMETER ALLOWABLE VARIATION
| MPH (KM/H) Vehicle Speed |
Acceptable Range MPH (KM/H) |
| 10 (16) |
8.5-11.5 (13.7-18.5) |
| 20 (32) |
18.5-21.5 (29.8-34.6) |
| 40 (64) |
38.5-41.5 (62.0-66.8) |
| 60 (96.5) |
58.5-61.5 (94.1-98.9) |
| 80 (128.7) |
78.5-81.5 (126.3-131.2) |
| 100 (161) |
98.5-101.5 (158.5-163.3) |
| 120 (193.1) |
118.5-121.5 (190.7-195.5) |