On-Vehicle Inspection [10/2017 - 09/2020]: Procedure
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 350, 2023 Lexus IS 300, and 2022 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT MASS AIR FLOW METER SUB-ASSEMBLY
HINT:
Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.
Refer to INITIALIZATION [10/2017 - 09/2018] , or refer to INITIALIZATION [09/2018 - 09/2020]
- Read the value using the Techstream (Mass Air Flow Sensor).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.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) (do not start the engine).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Data List / Mass Air Flow Sensor.
Powertrain > Engine > Data List
Tester Display Mass Air Flow Sensor - Wait for 30 seconds, and read the value on the Techstream.
Standard Condition
Tester Display Condition Specified Condition Mass Air Flow Sensor - Engine not running
- 30 seconds after engine switch turned on (IG)
0.54 gm/sec or less If the result is not as specified, clean the mass air flow meter sub-assembly.
Refer to INSPECTION [10/2017 - ]
If the result is within the specified range, check the intake air temperature sensor (thermistor) resistance.
Refer to INSPECTION [10/2017 - ]
- Read the value using the Techstream (Mass Air Flow Sensor).