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Home >> Mazda >> 2021 >> 3 Turbo, 4D Hatchback >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (VIN Y) >> Boost Pressure 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 PCM PID [BOOST_PRES_ACT] and [BOOST_PRES_ACT_VOLT]. (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (VIN Y)] .)
  4. Compare the voltage and boost pressure indications for the PIDs [BOOST_PRES_ACT_VOLT] and [BOOST_PRES_ACT] with the standard in the table indicated below.
    • If they do not match the standard, perform the voltage inspection. (See VOLTAGE INSPECTION .)
STANDARD VOLTAGE SPECIFICATION

BOOST_PRES_ACT_VOLT BOOST_PRES_ACT Remarks
V kPa {kgf/cm2 , psi}
Approx. 4.12 101 {1.03, 14.6} Ignition switched ON (engine off)
Approx. 1.90 33 {0.34, 4.8} Idle (after warm up)
Approx. 1.23 26 {0.27, 3.8} Racing (Engine speed: 2, 000 rpm)