MASS AIR FLOW METER ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Note


  • Perform the MAF meter inspection according to the procedures below.

  • Only replace the MAF meter when the MAF value in the Data List (with the engine stopped) is not within the normal operating range.

PROCEDURE


  1. CHECK MASS AIR FLOW METER


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

      Note


      • Turn the ignition switch off.

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

      • Perform the inspection of the MAF meter while it is installed in the air cleaner case (installed on the vehicle).

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


      1. Turn the ignition switch to ON (do not run the engine).

      2. Turn the tester on.

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

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

        Standard condition
        Less than 0.23 g/sec.
        Standard
        Tester Display Condition Standard Condition
        MAF

        • Engine not running

        • 30 seconds after ignition switch is turned to ON

        		 Below 0.23 g/sec.

        If the result is not as specified, replace the MAF meter.