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Home >> Mazda >> 1997 >> Millenia Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 2.5L >> Engine Sensors & Switches >> Mass Airflow (MAF) Sensor >> Using Engine Signal Monitor
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Using Engine Signal Monitor

  1. Visually check MAF sensor for cracks or damage. If any damage is present, replace MAF sensor. If no damage is present, connect Engine Signal Monitor (49 9200 162A) to ECM/PCM. Measure voltage at ECM/PCM terminal 3E. See MASS AIRFLOW (MAF) SENSOR VOLTAGE  table.
  2. If voltage is not as specified, check continuity of each circuit between MAF sensor and ECM/PCM. See appropriate wiring diagram in WIRING DIAGRAMS - 2.5L article. Repair as necessary. If continuity exists in all circuits, replace MAF sensor.
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