Using A Speedometer Tester

Adjust the tire pressure to the specification.
Using a speedometer tester, verify that the tester reading is as indicated in the figure. See Fig 1 - Fig 2 .

Fig 1: Speedometer Tester Indication & Allowable Range - KMPH
Courtesy of MAZDA MOTORS CORP.

Fig 2: Speedometer Tester Indication & Allowable Range - MPH
Courtesy of MAZDA MOTORS CORP.
Verify that the speedometer reading is within range.
- If the speedometer does not move or the indication is not within the allowable range, inspect the ABS HU/CM (vehicles with ABS), DSC HU/CM (vehicles with DSC) and related wiring harnesses.
  - If the ABS HU/CM (vehicles with ABS), DSC HU/CM (vehicles with DSC) and related wiring harnesses are normal, replace the instrument cluster.