Using A Speedometer Tester

Adjust the tire air pressure to the specification.
Using a speedometer tester, verify that the speedometer indication is within the allowable ranges shown below.

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 fluctuation of the speedometer needle is within the allowable range.
- If the speedometer needle does not move or the indication is outside of the allowable range, inspect the PCM, ABS HU/CM (vehicles with ABS), VSS (vehicles without ABS) and related wiring harnesses.
  - If the PCM, ABS HU/CM (vehicles with ABS), VSS (vehicles without ABS) and related wiring harnesses are normal, replace the instrument cluster.
  - Needle fluctuation allowable range: Within 3.0 km/h