Hino Motors HINO 155 series Workshop Manual page 65

DIAGNOSTIC TROUBLE CODE (DTC) TABLE
SVS DTC
MIL
Light No.
Light No Light P0405
Light No Light P0406
Light No Light P041B
Light No Light P041C
Light No Light P041D
No
No Light P0420
Light
Light No Light P0421
Light No Light P0422
Light No Light P0489
Light No Light P0490
Light No Light P049D
Light No Light P04D5
Light No Light P04D6
ENGINE (J05E)/TROUBLESHOOTING
DIAGNOSIS ITEM
EGR valve controller position
sensor signal too low (EGR actu-
ator position sensor signal too
low)
Valve position sensor magnet
lost (EGR actuator position sen-
sor signal too high)
EGR gas temperature sensor
- rationality
EGR gas temperature sensor
- out of range (Out of range low)
EGR gas temperature sensor
- out of range (Out of range high)
Tentative determination of ATC
deterioration
Determination of ATC deteriora-
tion
DOC deterioration
EGR valve controller motor (open
circuit) (EGR actuator motor
open circuit)
EGR valve controller motor
(short circuit) (EGR actuator
motor short circuit)
Position failure
(EGR actuator wiping fault)
Exhaust brake - circuit (Circuit
low)
Exhaust brake - circuit (Circuit
high)
INSPECTION ITEM
• EGR valve
• EGR valve
• EGR cooler outlet temperature sensor
• ECU (ECU connector)
• Wire harness
• Intake air temperature sensor
(intake manifold)
• Intake air temperature sensor
(intercooler outlet)
• Boost pressure sensor
• EGR cooler outlet temperature sensor
• ECU (ECU connector)
• Wire harness
• EGR cooler outlet temperature sensor
• ECU (ECU connector)
• Wire harness
—
• Fuel
• Exhaust gas temperature sensor
(DPF inlet)
• Fuel
• Exhaust gas temperature sensor
(DPF inlet)
• EGR valve
• EGR valve
• EGR valve
• EGR controller
• Exhaust brake magnetic valve
• Wire harness
• ECU (ECU connector)
• Exhaust brake magnetic valve
• Wire harness
• ECU (ECU connector)
2–29
SYMPTOM
A
A
—
—
—
—
—
—
A
A
A
—
—