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Home >> Toyota >> 2019 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Control System (1AR-FE) (Service Information) (Except Hybrid)) >> Mass Air Flow Meter >> On-Vehicle Inspection [12/2013 - ] >> Procedure

On-Vehicle Inspection [12/2013 - ]: Procedure

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  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 [12/2013 - ]

    1. Read the value using the Techstream (MAF).
      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 ignition switch to ON (do not 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 Standard Condition
        MAF
        • Engine not running
        • 30 seconds after ignition switch turned to ON
        0.49 gm/sec or less

        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 [12/2013 - ] 

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

      Refer to INITIALIZATION [12/2013 - ]