On-Vehicle Inspection [12/2019 - 10/2022]: Procedure

HINT: 

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

Refer to INITIALIZATION [12/2019 - 10/2022]

1. Read the value of Data List item "Mass Air Flow Sensor" using the GTS.
   NOTE:

   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. Start the engine.
   3. According to the display on the GTS, read the Data List when the engine is running.

      Powertrain > Engine > Data List 

      Tester Display
      Mass Air Flow Sensor

      Standard Condition

      GTS 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.

      Refer to INSPECTION [12/2019 - 10/2022] 

1. Remove the air cleaner cap sub-assembly.
2. Clean the mass air flow meter sub-assembly.
   NOTE:

   • 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.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *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.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *a	Air Blow Duration
      *b	3 to 6 Seconds
      *c	1 Second
      *d	Air Blowing
      *e	Air Stopped

3. Install the air cleaner cap sub-assembly.

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

   Refer to INITIALIZATION [12/2019 - 10/2022]