Last Modified: 07-31-2024 |
6.11:8.1.0 |
Doc ID: RM1000000025XY7 |
Model Year Start: 2023 |
Model: Corolla |
Prod Date Range: [09/2022 -
] |
Title: 2ZR-FXE (ENGINE CONTROL): MASS AIR FLOW METER: ON-VEHICLE INSPECTION; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] |
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.
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(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:
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Turn off all electrical loads, such as the air conditioning, etc.
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Check that the coolant temperature is 75°C (167°F) or more.
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Put the shift lever in the N position.
(2) Connect the Techstream to the DLC3.
(3) Turn the power switch on (IG).
(4) Turn the Techstream on.
(5) Put the engine in Inspection Mode (Maintenance Mode).
Powertrain > Hybrid Control > Utility
Tester Display
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Inspection Mode
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(6) Start the engine.
(7) Enter the following menus: Powertrain / Engine / Data List / Mass Air Flow Sensor.
Powertrain > Engine > Data List
Tester Display
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Mass Air Flow Sensor
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(8) According to the display on the Techstream, read the Data List when the engine is running.
Standard Condition:
Techstream Display
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Condition
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Specified Condition
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Mass Air Flow Sensor
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Idling with warmed up engine (inspection mode [maintenance mode], not charge control)
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1.0 to 3.0 gm/sec
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Warmed up engine, 2500 rpm (inspection mode [maintenance mode])
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4.5 to 8.5 gm/sec
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If the result is not as specified, clean the mass air flow meter sub-assembly.
If the result is within the specified range, inspect the mass air flow meter sub-assembly.
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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.
*1
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Mass Air Flow Meter Sub-assembly
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*a
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Air Blow Gun
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*b
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10 mm (0.394 in.)
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*c
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Airflow Hole
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(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) 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).
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|
*a
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Air Blow Duration
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*b
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3 to 6 Seconds
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*c
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1 Second
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*d
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Air Blowing
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*e
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Air Stopped
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|
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(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.
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