Speedometer Calibration Check
- Drive vehicle at 30 MPH and 60 MPH on road with measured mile markers. Time interval between mile markers. Divide 60 by number of minutes between mile markers. This number is actual vehicle speed.
- Compare actual vehicle speed with allowable range. See SPEEDOMETER SPECIFICATIONS table. If actual speed is within range, speedometer is working properly. If speedometer does not indicate within allowable range, replace instrument cluster.
NOTE:
Improper tire size will cause error in speedometer indication.
SPEEDOMETER SPECIFICATIONS
| Standard Indication (MPH) | Allowable Range (MPH) |
|---|---|
| 30 | 27-34 |
| 60 | 54-69 |