Hino Motors HINO 155 series Workshop Manual page 185

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 V to 16 V.
• 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 engine speed is 1500 r/min or more.
• Fuel injection quantity is 40 mm
• A change in the engine speed is 156 r/min/sec or less.
• A change in fuel injection quantity is 78 mm
• Atmospheric pressure is higher than 75 kPa.
• Vehicle speed is 13 mph or more.
• Intake air quantity is 45 g/sec or more.
• Intake air temperature sensor (built-in air flow sensor) is -10 C {14 F} or more.
• Exhaust brake and DPR is not actuated.
(2) Judgement criteria
• The calculated intercooler efficiency, which is derived from the intake temperature sensor, boost pressure sen-
sor, intercooler outlet temperature sensor, and atmospheric pressure sensor, is greater than 140%.
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 detected after test drive.
8. Estimated failure factors
• Intercooler outlet temperature sensor malfunction
• Failure of intake air temperature sensor (with built-in air flow sensor)
• 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)
• ECU sensor power supply failure
ENGINE (J05E)/TROUBLESHOOTING
3
/st.cyl or more.
3
/st.cyl. sec or less.
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