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Home >> Mazda >> 2012 >> MX-5 Miata Sport, Automatic >> Repair and Diagnosis >> Electrical >> Horns >> Instrumentation/Driver Info >> Instrument Cluster Inspection >> Speedometer >> Using a speedometer tester

Using a speedometer tester

  1. Adjust the tire pressure to the specification. See TIRE PRESSURE ADJUSTMENT (WITH TPMS)
  2. Using a speedometer tester, verify that the tester reading is as indicated in the table below.
    SPEEDOMETER TESTER INDICATION RANGE REFERENCE

    Speedometer tester indication (km/h) Allowable range (km/h)
    20 17-23
    40 37-42
    60 57-63
    80 77-83
    100 96-103
    120 116-123
    140 136-143
    SPEEDOMETER TESTER INDICATION RANGE REFERENCE

    Speedometer tester indication (mph) Allowable range (mph)
    10 8-12
    20 18-22
    30 28-32
    40 38-42
    50 48-52
    60 58-62
    70 68-72
    80 77-82
  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 PCM and the related wiring harnesses.