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 table. If reading on vehicle speedometer does not fall within acceptable range, replace speedometer.
SPEEDOMETER ALLOWABLE VARIATION
| Vehicle Speed: MPH (KM/H) |
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) |
| 55 (88.5) |
53.5-56.5 (86.1-91.0) |
| 75 (120.7) |
73.5-76.5 (118.3-123.1) |
| 100 (161) |
98.5-101.5 (158.5-163.3) |