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- Refer to Data List Reference Table .
- Item 114: Air flow sensor
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 -
How to Use Troubleshooting/Inspection
Service Points -
How to Cope with Intermittent Malfunctions ).
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Q.
Is the check result normal?
Go to Step 3 .
Repair or replace the connector.
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- Disconnect connector, and measure at harness side.
- Ignition switch: ON
- Voltage between terminal No. 5 and earth.
OK: System voltage
Q.
Is the check result normal?
Go to Step 5 .
Go to Step 4 .
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Q.
Is the check result normal?
Check and repair harness between A-20X (terminal No.
3) engine control relay connector and A-135 (terminal No. 5) air flow sensor connector.
- Check power supply for open/short circuit.
Repair or replace the connector.
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- Disconnect connector, and measure at harness side.
- Resistance between terminal No. 4 and earth.
OK: Continuity (2 Ω
or less)
Q.
Is the check result normal?
Go to Step 9 .
Go to Step 6 .
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Q.
Is the check result normal?
Go to Step 7 .
Repair or replace the connector.
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- Check earthing line for damage.
Q.
Is the check result normal?
Go to Step 8 .
Repair the damaged harness wire.
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- Refer to Data List Reference Table .
- Item 114: Air flow sensor
Q.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 -
How to Use Troubleshooting/Inspection
Service Points -
How to Cope with Intermittent Malfunctions ).
Replace the engine-ECU. After replacing the engine-ECU, register the injector
identification code and learn fuel injection (Refer to GROUP 00 -
Precautions Before
Service -
What The Common Rail Engine Learns ).
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- Disconnect connector, and measure at harness side.
- Voltage between terminal No. 3 and earth.
OK: 4.9 -
5.1 V
Q.
Is the check result normal?
Go to Step 12 .
Go to Step 10 .
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Q.
Is the check result normal?
Repair or replace the connector.
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- Check output line for short circuit.
Q.
Is the check result normal?
Replace the air flow sensor.
Repair the damaged harness wire.
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- Measure engine-ECU terminal voltage.
- Disconnect A-135 air flow sensor connector.
- Ignition switch: ON
- Voltage between terminal No. 140 and earth.
OK: 4.9 -
5.1 V
Q.
Is the check result normal?
Go to Step 14 .
Go to Step 13 .
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Q.
Is the check result normal?
Check and repair harness between A-135 (terminal No.
3) air-flow sensor connector and C-103 (terminal No. 140) engine-ECU connector.
- Check output line for open circuit.
Repair or replace the connector.
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Q.
Is the check result normal?
Go to Step 8 .
Repair or replace the connector.
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