Isuzu 2008MY N Series, Руководство по ремонту

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Engine Control System (4HK1) 1A-49
Scan Tool Output Controls
Scan Tool Output Control Descriptions
Fuel Pressure Control The purpose of this test is for checking whether the fuel rail pressure is changing
when commanded within 30 to 80MPa (4,350 to 11,600psi) when commanded.
Faulty fuel supply pump, fuel rail pressure (FRP) regulator, pressure limiter valve
or other fuel lines could be considered if the differential fuel rail pressure is large.
Pilot Injection Control The purpose of this test is for checking whether the pilot fuel injection is operated
when it is commanded to ON/ OFF. Faulty injector(s) could be considered if
engine noise does not change when commanded OFF.
Injection Timing Control The purpose of this test is for checking whether the main injection timing is
changing when commanded Retard/ Advance within -5 to 5
°
CA.
Injector Forced Drive The purpose of this test is for checking whether the fuel injector is correctly
operating when commanded ON. Faulty injector(s) could be considered if it does
not create a clicking noise (solenoid operating noise), contains an interrupted
noise or has abnormal noise when commanded ON.
Cylinder Balance Test The purpose of this test is for checking whether the fuel injector is operating when
commanded ON/ OFF. Faulty injector(s) could be considered if engine does not
change speed when commanded OFF.
Intake Throttle Solenoid
Control
The purpose of this test is for checking whether the intake throttle valve is
correctly moved with command. Restricted valve movement by foreign materials,
excessive deposits or a faulty valve could be considered if the position difference
is large.
EGR Solenoid Control The purpose of this test is for checking whether the EGR valve is correctly moved
with command. Restricted valve movement by foreign materials, excessive
deposits or a faulty valve could be considered if the position difference is large.
Turbocharger Solenoid
Control
The purpose of this test is for checking whether the turbocharger nozzle control
actuator is correctly moved with command. Restricted actuator movement by
foreign materials, excessive deposits, damaged linkage, a faulty actuator or a
faulty position sensor could be considered if the solenoid is not moved correctly.
Glow Relay Control The purpose of this test is for checking whether the glow relay is operating when
commanded ON. Faulty circuit(s) or a faulty glow relay could be considered if not
energizing when commanded ON.
Exhaust Brake Control The purpose of this test is for checking whether the exhaust brake control
solenoid is operating when commanded ON. Faulty circuit(s) or a faulty solenoid
could be considered if not energizing when commanded ON.
Exhaust Throttle Control The purpose of this test is for checking whether the exhaust throttle solenoid valve
is operating when commanded ON. Faulty circuit(s) or a faulty exhaust throttle
solenoid valve could be considered if not energizing when commanded ON.
DPD Normal Regeneration
Control
Important: Do not perform this test if the exhaust differential pressure is more
than a threshold.
The purpose of this test is for DPD filter force regeneration.
DPD Slow Regeneration
Control
Important: Do not perform this test if the exhaust differential pressure is more
than a threshold. And, engine oil must be replaced after DPD slow regeneration is
completed.
The purpose of this test is for DPD filter force regeneration in case of excessively
accumulated PM. This very slow regeneration compared with another one.
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