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Home >> Lexus >> 2011 >> RX 450h 3.5 C >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (Service Information) >> Mass Air Flow Meter >> On-Vehicle Inspection >> On-Vehicle Inspection
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On-Vehicle Inspection

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 power switch on (IG) (do not run the engine).
      3. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF.
      4. Wait 30 seconds, and read the values on the Techstream.

        Standard Condition

        Tester Display Condition Specified Condition
        MAF
        • Engine not running
        • 30 seconds after power switch turned on (IG)
        		 0.58 g/sec. or less

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

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

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