Hino Motors HINO 155 series Workshop Manual page 463

2. DTC set condition
(1) DTC detection condition
1. All the following conditions continue for more than 30 seconds.
• The engine speed is in the range of 250 to 900 r/min.
• The fuel injection quantity is within 0 to 50 mm
• The exhaust brake and PTO are inactive.
2. All the following conditions continue for more than 10 seconds.
• The engine speed is in the range of 725-775 r/min.
• Gear position is D range.
• The fuel injection quantity is less than 45 mm
• The coolant temperature is above 71 C {159.8 F}.
• The accelerator opening is 0%.
• The vehicle speed is 0 mile/h.
• Barometric pressure ≥ 75 kPa.
• The exhaust brake and PTO are inactive.
(2) Judgement criteria
If all the following conditions continue for more than 10 seconds, diagnostic judgment will take place.
• The fuel injection quantity is more than 40 mm
• The speed of each cylinder measured by engine speed main sensor (crankshaft position sensor) becomes
abnormal.
3. Reset condition
• After restoration to normal condition
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
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>
• Excessive vibration while engine is idling.
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
• Fuel injection line: break, crack, fuel leak
• Cylinder: compression leak
• Common rail: flow damper operational error
• Injector: clogged or stays open
ENGINE (J05E)/TROUBLESHOOTING
3
/st. cyl.
3
/st. cyl.
3
/st. cyl.
2–427