MASS AIR FLOW METER ON-VEHICLE INSPECTION

Note


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

  • Only replace the mass air flow meter 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 platinum hot wire (heater).

Tech Tips

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly 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 while it is installed to the air cleaner case (installed to the vehicle).

    • During the test, do not use an exhaust air duct to perform suction on the exhaust pipe.


    1. Connect the Techstream to the DLC3.

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

    3. Turn the Techstream 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 Techstream.

      Standard
      Item Condition Specified Condition
      MAF

      • Engine not running

      • 30 seconds after turning power switch on (IG)

      		 0.50g/sec. or less

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

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