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Using a speedometer tester

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
  1. Adjust the tire pressure to the specification.
  2. Using a speedometer tester, verify that the tester reading is as indicated in the table below.
    SPEEDOMETER TESTER INDICATION (KM/H)

    Speedometer tester indication (km/h) Allowable range (km/h)
    20 19-21
    40 39-41
    60 59-61
    80 79-81
    100 99-101
    120 119-121
    140 139-141
    SPEEDOMETER TESTER INDICATION (MPH)

    Speedometer tester indication (mph) Allowable range (mph)
    10 9-11
    20 19-21
    30 29-31
    40 39-41
    50 49-51
    70 69-71
    80 78-82
  3. Verify that the speedometer reading is within the range indicated in the table.
    • 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.
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