MASS AIR FLOW METER ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Note


  • Perform the mass air flow meter inspection according to the procedures 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).

PROCEDURE


  1. INSPECT MASS AIR FLOW METER


    1. Read the value 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 to the air cleaner case (installed to the vehicle).

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


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

      2. Turn the tester ON.

      3. Enter the following menus: Powertrain / Engine / Data List / All Data / MAF Sensor 1 or MAF Sensor 2.

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

        Standard Condition
        Item Condition Standard Condition
        MAF Sensor 1

        • Engine not running


        • 30 seconds after engine switch is turned on (IG)

        		 Below 0.25 g/sec.
        MAF Sensor 2

        • Engine not running


        • 30 seconds after engine switch is turned on (IG)

        		 Below 0.25 g/sec.

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

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