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Home >> Mazda >> 2021 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Control >> Engine Control System Operation Inspection >> Drive-by-wire Control System Inspection >> Load compensation inspection
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Load compensation inspection

  1. Start the engine and let it idle.
  2. Connect the M-MDS to the DLC-2.
  3. Select the RPM PID.
    NOTE:
    • Excludes temporary idle speed drop just after the loads are turned on.
  4. Verify that the engine speed is within specification under each load condition.
    • If the load condition is not as specified, inspect the following:

    Idle-up speed [Convertible top] (MT: Neutral position, AT: P position or N position)

    No load: 660-760 RPM (MT), 670-770 RPM (AT)

    A/C on: 720-870 RPM (MT), 700-800 RPM (AT)

    Electrical loads on: 680-780 RPM (MT), 690-790 RPM (AT)

    Idle-up speed [Retractable hardtop] (MT: Neutral position, AT: P position or N position)

    No load: 700-800 RPM (MT), 720-820 RPM (AT)

    A/C on: 720-870 RPM (MT), 720-820 RPM (AT)

    Electrical loads on: 700-800 RPM (MT), 720-820 RPM (AT)