Hino Motors HINO 155 series Workshop Manual page 733

5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• –
<Symptoms on the vehicle due to malfunction>
• Vehicle is hard to start.
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 stored after test drive.
8. Estimated failure factors
• Blown, improperly connected, or half-connected fuse
• Harness disconnection or short-circuit
• Abnormal ground potential difference between engine ECU and GCU
• GCU failure
ENGINE (J05E)/TROUBLESHOOTING 2–697