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Instrument Cluster Inspection: Tachometer

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • If the engine speed exceeds the allowable range, the engine could be damaged. Therefore, when inspecting the tachometer, do not allow the engine speed to exceed the allowable range indication on the tachometer.
  1. Connect the M-MDS to the DLC-2.
  2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
    • When using the IDS (laptop PC)
      1. Select "DataLogger".
      2. Select "Modules"
      3. Select "IC"
    • When using the PDS (Pocket PC)
      1. Select "Module Tests"
      2. Select "IC"
      3. Select "DataLogger"
        Fig 1: Identifying M-MDS To DLC-2
        G06201210Courtesy of MAZDA MOTORS CORP.
  3. Verify that it is displayed according to the table using "TACHOMTR"
    • If the tachometer does not move or the indication is not within the allowable range, inspect the related wiring harnesses.
      • if the related wiring harnesses are normal, replace the instrument cluster.
        INSTRUMENT CLUSTER REFERENCE

        M-MDS display Instrument cluster display
        3,000 RPM Tachometer gauge needle moves to approx 3,100 RPM
        6,000 RPM Tachometer gauge needle moves to approx 6,200 RPM
        Off Tachometer gauge needle moves to 0 RPM
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