Hino Motors HINO 155 series Workshop Manual page 183

2. DTC set condition
(1) DTC detection condition
• Starter key "ON".
• The engine speed is 1000 r/min or less.
• Engine coolant temperature is in the range of -30 to 55 C {-22 to 131 F}.
• The battery voltage is in the range of 10 V 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 average temperature of the air intake temperature sensor (built in the air flow sensor) and
the intercooler outlet temperature sensor is 30 C {86 F} or more while the average temperature of the inter-
cooler outlet temperature sensor and the intake manifold temperature sensor is 30 C {86 F} or more.
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)
• Intake air temperature sensor malfunction
- 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 2–147