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Home >> Lexus >> 2017 >> GS F >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Control System - Service Information >> Mass Air Flow Meter >> On-Vehicle Inspection [10/2015 - ] >> Procedure

On-Vehicle Inspection [10/2015 - ]: 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 [10/2015 - ]

    1. Read the value using the Techstream (MAF).
      NOTE:

      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).

      1. Connect the Techstream to the DLC3.
      2. Start the engine.
      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine / Data List / MAF.

        Powertrain > Engine > Data List 

        Tester Display
        MAF
      5. Wait for 30 seconds, and read the value on the Techstream.

        Standard Condition

        Tester Display Condition Specified Condition
        MAF Idling 4.0 to 7.0 gm/sec
        2000 rpm 12.0 to 16.0 gm/sec
        3000 rpm 17.0 to 23.0 gm/sec

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

        If the result is within the specified range, inspect the mass air flow meter sub-assembly.

        Refer to INSPECTION [10/2015 - ] 

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

      Refer to INITIALIZATION [10/2015 - ]