Hino Motors HINO 155 series Workshop Manual page 807

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.
<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 engine room interior temperature
• Abnormal heat rise in motor or element inside EGR actuator.
• Soot adhesion and damage due to hard foreign substances on EGR valve sealing face and gas passageway.
(Hardened carbon may peel off from EGR cooler upstream of EGR valve.)
ENGINE (J05E)/TROUBLESHOOTING 2–771