P041B: Egr Gas Temperature Sensor Rationality - Hino Motors HINO 155 series Workshop Manual

P041B: EGR gas temperature sensor - rationality
INFORMATION [at engine running 1]
Common rail
pressure sensor
Intake manifold
temperature sensor
1. Technical description
• The EGR cooler outlet temperature sensor consistently measures temperature at the outlet of the EGR cooler.
<Description of malfunction>
• EGR cooler outlet temperature cannot be correctly recognized.
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 engine speed is 1500 r/min or more.
• Fuel injection quantity is 40 mm
• The EGR gas flow rate is 36 kg/h or more.
• 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 are not actuated.
(2) Judgement criteria
• Judged when the calculated EGR cooler efficiency based on engine speed, fuel injection quantity and EGR
gas outlet temperature are as follows: If the EGR gas flow rate is 144 kg/h: The efficiency is higher than 105%.
If the EGR gas flow rate is 100 kg/h: the efficiency is higher than 115%.
ENGINE (J05E)/TROUBLESHOOTING
Engine ECU
EGR cooler outlet
temperature sensor
temperature sensor
Boost pressure
sensor
3
/st. cyl or more.
3
/st.cyl.sec or less.
VNT
controller
Intercooler outlet
2–507
Resistor
Actuator power
relay
EGR
actuator
Y2E Y4J Z90
NAT X36 $4
SHTS021270300470