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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 >> Engine coolant temperature compensation inspection
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Engine coolant temperature compensation inspection

  1. Connect the M-MDS to the DLC-2.
  2. Select the following PIDs: (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)] .)
    • ECT
    • IAT
    • RPM
  3. Verify that the engine is cold, then start the engine.
  4. Verify that the engine speed decreases as the engine warms up.
    • If the engine speed does not decrease or decreases slowly, inspect the following:
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