MASS AIR FLOW METER ON-VEHICLE INSPECTION

Note


  • Perform the mass air flow meter inspection in accordance with the procedure below.

  • Only replace the mass air flow meter when any foreign matter adheres to the sensor or both MAF values in the Data List (with the engine stopped) are not within the normal operating range.


  1. CHECK MASS AIR FLOW METER


    1. Read the values using the intelligent tester (MAF).

      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 into the air cleaner case (installed on the vehicle).

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


      1. Connect the intelligent tester to the DLC3.

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

      3. Turn the intelligent tester on.

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

      5. Wait 30 seconds, and then read the values on the intelligent tester.

        Standard
        Tester Display Condition Specified Condition
        MAF
        • Engine not running

        • 30 seconds after engine switch is turned to on

        Less than 0.49 g/sec.

        • If the result is not as specified, replace the mass air flow meter.

        • If the result is within the specified range, remove and inspect the mass air flow meter Click here.