Hino Motors HINO 155 series Workshop Manual page 425

1. Technical description
• The engine speed main sensor (crankshaft position sensor) monitors the speed of each cylinder.
• For control, it increases or reduces the compensation of the injection quantity of each cylinder to make constant the
speed of each cylinder.
<Description of malfunction>
• If the speed of the #1 cylinder is found abnormal, the DTC P0263 will be detected.
• If the speed of the #2 cylinder is found abnormal, the DTC P0266 will be detected.
• If the speed of the #3 cylinder is found abnormal, the DTC P0269 will be detected.
• If the speed of the #4 cylinder is found abnormal, the DTC P0272 will be detected.
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 within the below table.
• Gear position unchanged
• 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 (10.8 psi)
• The exhaust brake and PTO are inactive.
Engine speed (r/min)
Manual Transmission
D range
N range
P range
(2) Judgement criteria
• If the #1 cylinder speed measured by the engine speed main sensor is low, the fuel injection quantity retains a
value lower by 30 to 45 mm
• If the #1 cylinder speed measured by the engine speed main sensor is high, the fuel injection quantity retains
a value higher by 10 to 20 mm
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
ENGINE (J05E)/TROUBLESHOOTING
Automatic Transmission
N/A
725-775
N/A
3
/st.cyl or more for 20 seconds or more.
3
/st.cyl or less for 20 seconds or more.
3
/st. cyl.
3
/st. cyl.
725-775
N/A
N/A
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