Hino Motors HINO 155 series Workshop Manual page 385

5. Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
• Cruise control does not work.
• Idling stop system does not work.
• Vehicle start control does not work.
<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 stored after test drive.
8. Estimated failure factors
• Looseness or poor contact of connector
• vehicle side harness disconnection (engine ECU – injector central connector)
• Injector harness disconnection or short-circuit
• Disconnected coil in the injector
• Malfunction of ECU
ENGINE (J05E)/TROUBLESHOOTING 2–349