Toyota Yaris: Mass Air Flow Meter / On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT MASS AIR FLOW METER
HINT:
Perform "Inspection After Repair" after replacing the mass air flow meter.
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(a) Read the value of Data List item "Mass Air Flow Sensor" using the GTS.
NOTICE:
Perform the inspection of the mass air flow meter while it is installed to the air cleaner cap sub-assembly (installed to the vehicle).
(1) Vehicle is made into the following state.
- Turn off all electrical loads, such as the air condition, etc.
- Check that the coolant temperature is 75 °C (167 °F) or more.
- Put the Shift Lever in the N position.
(2) Connect the GTS to the DLC3.
(3) Start the engine.
(4) Turn the GTS 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 GTS, read the Data List when the engine is running.
Standard Condition:
| GTS Display | Condition | Specified Condition |
|---|---|---|
| Mass Air Flow Sensor | Idling | 1.5 to 4.5 gm/sec |
| 2000 rpm | 2.5 to 8.0 gm/sec | |
| 3000 rpm | 4.5 to 12.0 gm/sec |
If the result is not as specified, replace the mass air flow meter.
If the result is within the specified range, remove and inspect the mass air flow meter.
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2. PERFORM INITIALIZATION
(a) Perform "Inspection After Repair" after replacing the mass air flow meter.
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Components
C..
Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the mass air flow meter removal/installation are shown below...
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Turning the Engine Off
Stop the vehicle completely. Manual transaxle: Shift into neutral and set the parking brake.Automatic transaxle: Shift the selector lever to the P position and set the parking brake.
Press the push button start to turn off the engine. The ignition position is off.