Hino Motors HINO 155 series Workshop Manual page 413

(2) Judgement criteria
• Deviation between the target boost pressure and the actual boost pressure: the condition that the deviation
exceeds the range of 40 to 50 kPa remains 30 seconds or more.
• If target boost pressure is 140 to 220 kPa, the deviation of boost pressure detected is 40 kPa or more.
• If target boost pressure is 220 to 250 kPa, the deviation of boost pressure detected is 45 kPa or more.
3. Reset condition
• After restoration to normal condition and starter key "LOCK"
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>
• Turbocharger noise or damage
• Insufficient output or engine stall because of DPR filter clogging due to abnormal soot generation
6. Pre-inspection work
• Check that the battery voltage is in the normal range.
7. After-inspection work
• Clear all past DTCs.
• Check that DTC is not detected after test run (10 minutes after engine startup).
8. Estimated failure factors
• VNT actuator failure (VNT nozzle closed-side failure)
• EGR valve failure (EGR valve closed-side failure)
• Clogged boost pressure sensor hose
• Boost pressure sensor failure (abnormal voltage, power supply or ground fault)
ENGINE (J05E)/TROUBLESHOOTING 2–377