Hino Motors HINO 155 series Workshop Manual page 272

2–236
5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• Engine output is insufficient.
• EGR valve is fully closed.
• VNT is fully open.
<Symptoms on the vehicle due to malfunction>
• –
6. Pre-inspection work
• Check that the battery voltage is in the normal range.
7. After-inspection work
• Clear all past DTCs.
• Check that no DTC is detected after test drive.
8. Estimated failure factors
• Abnormal resistance of the engine coolant temperature sensor.
• Engine ECU sensor power supply failure.
ENGINE (J05E)/TROUBLESHOOTING