MASS AIR FLOW METER ON-VEHICLE INSPECTION

Note


  • Perform the mass air flow meter sub-assembly inspection according to the procedure below.

  • Only replace the mass air flow meter sub-assembly when the mass air flow value in the Data List (with the engine stopped) is not within the normal operating range or there is foreign matter on the mass air flow meter sub-assembly platinum hot wire (heater).

Tech Tips

Perform "Inspection After Repairs" after replacing the mass air flow meter Click here.


  1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

    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 GTS to the DLC3.

    2. Turn the engine switch on (IG) (do not start the engine).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / MAF.

    5. Wait 30 seconds, and read the values on the GTS.

      Standard
      Item Condition Specified Condition
      MAF

      • Engine not running

      • 30 seconds after turning engine switch on (IG)

      		 0.48g/sec. or less

      If the results are not as specified, replace the mass air flow meter sub-assembly.

      If the results are as specified, inspect the mass air flow meter sub-assembly Click here.