Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: On-vehicle Inspection

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Engine & Hybrid System / 2gr-fks (engine Control) / Mass Air Flow Meter / On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

HINT:

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

Click here

(a) Read the value of Data List item "Mass Air Flow Sensor" using the Techstream.

NOTICE:

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).

(1) Check and ensure the following conditions:

  1. Turn off all electrical loads, such as the air conditioning, etc.
  2. Check that the coolant temperature is 75°C (167°F) or more.
  3. Put the shift lever in the N position.

(2) Connect the Techstream to the DLC3.

(3) Start the engine.

(4) Turn the Techstream on.

(5) Enter the following menus: Powertrain / Engine / Data List / Mass Air Flow Sensor.

Powertrain > Engine > Data List

Tester Display

Mass Air Flow Sensor

(6) According to the display on the Techstream, read the Data List when the engine is running.

Standard Condition:

Techstream Display

Condition

Specified Condition

Mass Air Flow Sensor

Idling (engine warmed up)

2.6 to 3.7 gm/sec

2000 rpm (without load)

5.4 to 9.6 gm/sec

3000 rpm (without load)

10.6 to 15.8 gm/sec

If the result is not as specified, clean the mass air flow meter sub-assembly.

If the result is within the specified range, check the intake air temperature sensor (thermistor) resistance.

Click here

2. CLEAN MASS AIR FLOW METER SUB-ASSEMBLY

NOTICE:

If the mass air flow meter sub-assembly is removed and installed 10 times or more, the thread of the hole of the mass air flow meter sub-assembly may be damaged. Therefore, do not loosen the screws of the mass air flow meter sub-assembly.

(a) Remove the air cleaner cap sub-assembly.

(b) Clean the mass air flow meter sub-assembly.

NOTICE:

  • Do not contact the mass air flow meter sub-assembly with the nozzle of the air blow gun.
  • Do not insert the nozzle of the air blow gun into the airflow hole.

*1

Mass Air Flow Meter Sub-assembly

*a

Air Blow Gun

*b

10 mm (0.394 in.)

*c

Airflow Hole

(1) Using an air blow gun, clean the hole of the mass air flow meter sub-assembly by applying approximately 10 intermittent bursts of air to the airflow hole at a pressure of approximately 392 to 981 kPa (4.0 to 10.0 kgf/cm2, 57 to 142 psi).

HINT:

Apply 5 intermittent bursts of air to the airflow hole at 2 locations.

*a

Air Blow Duration

*b

3 to 6 Seconds

*c

1 Second

*d

Air Blowing

*e

Air Stopped

(c) Install the air cleaner cap sub-assembly.

3. PERFORM INITIALIZATION

(a) Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

Click here

    Components
    COMPONENTS ILLUSTRATION *1 AIR CLEANER CAP WITH AIR CLEANER HOSE *2 MASS AIR FLOW METER SUB-ASSEMBLY *3 NO. 1 FUEL VAPOR FEED HOSE *4 NO. 2 VENTILATION HOSE ...

    Removal
    REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during mass ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Tilt And Power Telescopic Steering Column System: Data List / Active Test
    DATA LIST / ACTIVE TEST READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may b ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Automatic Transaxle System: Shift Solenoid "A" Actuator Stuck On (P07507E)
    DESCRIPTION Based on signals from the transmission revolution sensors (NT, NC3 and NC), the actual gear is detected. The ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical malfunctions of the shift solenoid valves, transmission valve body assembly and automat ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2025 Copyright www.lexusrx.net
    0.0216