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Home >> Mazda >> 2020 >> 3 Base, 4D Hatchback, FWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (VIN M) >> Mass Air Flow (MAF) Sensor Inspection >> Function Inspection
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Function Inspection

  1. Connect the M-MDS to the DLC-2.
  2. Switch the ignition ON (engine off).
  3. Display the PID MAF. (See PID/DATA MONITOR INSPECTION .)
  4. Compare the voltage and flow rate indications for the PID MAF with the standard in the table indicated below.

Standard 

MASS AIR FLOW (MAF) SENSOR SPECIFICATION

MAF Remarks
V   g/s {lb/min}
Approx. 1.69 0.00 {0.000} Ignition switched ON (engine off)
Approx. 1.89 1.77 {0.234} Idle (after warm up)
Approx. 2.02 5.02 {0.664} Racing (Engine speed: 2, 000 RPM)