ENGINE (J05E)/TROUBLESHOOTING
2–614
5.
Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
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–
<Symptoms on the vehicle due to malfunction>
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–
6.
Pre-inspection work
•
Check that the battery voltage is in the normal range.
7.
After-inspection work
•
Clear all past DTCs.
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Check that no DTC is detected after test drive.
8.
Estimated failure factors
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Sensor is disconnected from measuring site or sensing unit is malfunctioning (due to dirt, clogging, damage, etc.).
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EGR valve failure.
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Diesel throttle valve failure.
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Intercooler failure (due to dirt, clogging, etc.).
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Engine ECU sensor power supply (air flow sensor dedicated 12 V power supply) failure or internal circuit failure.
