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Home >> Lexus >> 2021 >> IS 350 AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2GR-FKS) - Service Information >> Mass Air Flow Meter >> On-Vehicle Inspection [10/2017 - 09/2020] >> Procedure
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On-Vehicle Inspection [10/2017 - 09/2020]: Procedure

  1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY 

    HINT: 

    Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

    Refer to INITIALIZATION [10/2017 - 09/2018] , or refer to INITIALIZATION [09/2018 - 09/2020]

    1. Read the value using the Techstream (Mass Air Flow Sensor).
      NOTE:
      • Perform the inspection with the vehicle indoors and on a level surface.
      • Perform the inspection of the mass air flow meter sub-assembly while it is installed to the air cleaner cap sub-assembly (installed to the vehicle).
      • During the test, do not use an exhaust air duct on the exhaust pipe.
      1. Connect the Techstream to the DLC3.
      2. Turn the engine switch on (IG) (do not start the engine).
      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine / Data List / Mass Air Flow Sensor.

        Powertrain > Engine > Data List 

        Tester Display
        Mass Air Flow Sensor
      5. Wait for 30 seconds, and read the value on the Techstream.

        Standard Condition

        Tester Display Condition Specified Condition
        Mass Air Flow Sensor
        • Engine not running
        • 30 seconds after engine switch turned on (IG)
        0.54 gm/sec or less

        If the result is not as specified, clean the mass air flow meter sub-assembly.

        Refer to INSPECTION [10/2017 - ] 

        If the result is within the specified range, check the intake air temperature sensor (thermistor) resistance.

        Refer to INSPECTION [10/2017 - ]