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Home >> Toyota >> 2012 >> Sienna XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System (1AR-FE) (Service Information)) >> Mass Air Flow Meter >> On-Vehicle Inspection >> On-Vehicle Inspection

On-Vehicle Inspection

WARNING: This page is about a different variant/trim than selected.
NOTE:
  • Perform the MAF meter inspection according to the following procedure.
  • Only replace the MAF meter when the MAF value in the Data List (with the engine stopped) is not within the normal operating range or there is foreign matter on the MAF meter platinum hot wire (heater).
  1. INSPECT MASS AIR FLOW METER 
    1. Read the values using the Techstream (MAF).
      NOTE:
      • Perform the inspection with the vehicle indoors and on a level surface.
      • Perform the inspection of the MAF meter while it is installed to the air cleaner case (installed to the vehicle).
      • During the test, do not use an exhaust air duct on the exhaust pipe.
      1. Connect the Techstream to the DLC3.
      2. Turn the ignition switch to ON (do not run the engine).
      3. Enter the following menus: Powertrain / Engine / Data List / MAF.
      4. Wait for 30 seconds, and read the values on the Techstream.

        Standard

        Tester Display Condition Specified Condition
        MAF
        • Engine not running
        • 30 seconds after ignition switch turned to ON
        		 0.53 gm/sec or less

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

        If the result is within the specified range, remove and inspect the mass air flow meter. See step  1.

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