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- Refer to Data List Reference Table .
- Item 06: Manifold absolute pressure 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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- Use special tool test harness (MB991709) to connect connector,
and measure at pick-up harness.
- Ignition switch: ON
- Voltage between terminal No. 1 and earth.
OK: 4.9 - 5.1 V
Q.
Is the check result normal?
Go to Step 9 .
Go to Step 4 .
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- Measure engine-ECU terminal voltage.
- Ignition switch: ON
- Voltage between terminal No. 80 and earth.
OK: 4.9 - 5.1 V
Q.
Is the check result normal?
Go to Step 8 .
Go to Step 5 .
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Q.
Is the check result normal?
Go to Step 6 .
Repair or replace the connector.
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- Check power supply line for short circuit.
Q.
Is the check result normal?
Go to Step 7 .
Repair the damaged harness wire.
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- Refer to Data List Reference Table .
- Item 06: Manifold absolute pressure 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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Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number
(Refer to GROUP 00 - How to Perform Chassis Number Writing ).
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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Q.
Is the check result normal?
Check and repair harness between A-105 (terminal No.
1) manifold absolute pressure sensor connector and C-105 (terminal No. 80) engine-ECU connector.
- Check power supply line for open circuit and damage.
Repair or replace the connector.
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- Disconnect and measure at harness side.
- Ignition switch: ON
- Resistance between terminal No. 3 and earth.
OK: Continuity (2 Ω or less)
Q.
Is the check result normal?
Go to Step 12 .
Go to Step 10 .
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Q.
Is the check result normal?
Go to Step 11 .
Repair or replace the connector.
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- Check earthing line for damage.
Q.
Is the check result normal?
Go to Step 7 .
Repair the damaged harness wire.
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- Use special tool test harness (MB991709) to connect connector, and measure
at pick-up harness.
- Ignition switch: ON
- Voltage between terminal No. 2 and earth.
OK: 0.7 - 1.2 V
Q.
Is the check result normal?
Go to Step 15 .
Go to Step 13 .
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Q.
Is the check result normal?
Go to Step 14 .
Repair or replace the connector.
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- Check output line for short circuit.
Q.
Is the check result normal?
Replace the manifold absolute pressure sensor.
Repair the damaged harness wire.
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- Measure engine-ECU terminal voltage.
- Ignition switch: ON
- Voltage between terminal No. 52 and earth.
OK: 0.7 - 1.2 V
Q.
Is the check result normal?
Go to Step 17 .
Go to Step 16 .
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Q.
Is the check result normal?
Check and repair check harness between A-105 (terminal
No. 2) manifold absolute pressure sensor connector and C-105 (terminal No. 52) engine-ECU connector.
- Check output line for open circuit and damage.
Repair or replace the connector.
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Q.
Is the check result normal?
Go to Step 7 .
Repair or replace the connector.
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