MASS AIR FLOW METER ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Note:

  • Perform the mass air flow meter sub-assembly inspection according to the procedures below.

  • Only replace the mass air flow meter sub-assembly 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 SUB-ASSEMBLY

    Note:

    • Perform the inspection with the vehicle indoors and on a level surface.

    • Perform the inspection of the mass air flow meter sub-assembly while it is installed to the air cleaner cap sub-assembly (installed to the vehicle).

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

    Tip:

    Perform "Inspection After Repairs" after replacing the mass air flow meter sub-assembly.

    1. Connect the GTS to the DLC3.

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

    3. Turn the GTS on.

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

      Powertrain > Engine and ECT > Data List

      Tester Display

      MAF

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

      Standard (w/ Canister Pump Module)

      Item

      Condition

      Specified Condition

      MAF

      • Engine not running

      • 30 seconds after power switch turned on (IG)

      0.58 gm/sec or less

      Standard (w/o Canister Pump Module)

      Item

      Condition

      Specified Condition

      MAF

      • Engine not running

      • 30 seconds after power switch turned on (IG)

      0.60 gm/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