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 is not within the normal operating range (with the engine stopped) 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 GTS (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. Connect the GTS to the DLC3.

      2. Turn the ignition switch to ON (do not start the engine).

      3. Turn the GTS on.

      4. Enter the following menus: Data List / MAF.

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

        Standard
        Tester Display Condition Standard Condition
        MAF

        • Engine not running

        • 30 seconds after ignition switch is turned to ON

        		 0.85 gm/s or less

        • 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.