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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DESCRIPTION Detection Item Symptom Trouble Area Center Airbag Sensor Communication Stop Mode Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the GTS. Click here Airbag sensor assembly main line or connector Power source circuit of airbag sensor assembly Airbag sensor assembly ground circuit Airbag sensor assembly WIRING DIAGRAM CAUTION / NOTICE / HINT CAUTION: When performing the confirmation driving pattern, obey all speed limits and traffic laws...
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DIAGNOSIS SYSTEM DESCRIPTION (a) Power window control system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). When the system seems to be malfunctioning, use the GTS to check for malfunctions and perform repairs...
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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.