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. CHECK MASS AIR FLOW METER SUB-ASSEMBLY

    1. Read the value using the GTS (mass air flow).

      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 run the engine).

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

        Powertrain > Engine and ECT > Data List

        Tester Display

        MAF

      4. Wait 30 seconds, and then read the values on the GTS.

        Standard

        Tester Display

        Condition

        Specified Condition

        MAF

        • Engine not running

        • 30 seconds after ignition switch turned to ON

        0.31g/sec. or less

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

        If the result is within the specified range, inspect the mass air flow meter sub-assembly.

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