Hino Motors HINO 155 series Workshop Manual page 215

2. DTC set condition
(1) DTC detection condition
The conditions described below remain for 11 seconds or more.
• The battery voltage is in the range of 10 to 16 V.
• The condition that the engine speed remains at 500 r/min or more for 5 seconds or more.
The conditions described below remain for 40 seconds or more.
• The battery voltage is in the range of 10 to 16 V.
• The engine is stopped, or the engine speed remains at 500 r/min or more for 5 seconds or more.
• The engine speed is 1000 r/min or less.
• Fuel injection quantity is 35 mm
• Engine coolant temperature is in the range of -30 to 60 C {-22 to 140 F}.
• The battery voltage is in the range of 10 to 16 V.
• The engine is stopped, or the engine speed remains at 500 r/min or more for 5 seconds or more.
(2) Judgement criteria
• Judged when the calculated EGR cooler efficiency is greater than 65%,
• the difference between the calculated intake manifold air intake temperature and the actual intake air is higher
than 60 C {140 F} or less than -60 C {-76 F}, and
• the calculated intercooler efficiency is higher than the specified value (30% or more when the vehicle speed is
13 mile/h, 50% or more when the vehicle speed is 25 mile/h).
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>
• –
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
• Failure of intercooler outlet temperature sensor
• Failure of intake air temperature sensor (with built-in air flow sensor)
• Failure of intake manifold temperature sensor
• Failure of boost pressure sensor
- Sensor is disconnected from measuring site or sensing unit is malfunctioning (due to dirt, clogging, damage, etc.)
- Faulty resistance (due to sticking)
• Malfunction of ECU sensor power supply
ENGINE (J05E)/TROUBLESHOOTING
3
/st.cyl or less.
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