Perkins M250C - E396 High Fuel Rail Pressure; E398 Low Fuel Rail Pressure

110 KENR9126
Troubleshooting Section
i04016612
E396 High Fuel Rail Pressure
Conditions Which Generate This Code:
The Electronic Control Module (ECM) detects
excessive fuel rail pressure under the following
conditions:
•
The ECM detects fuel rail pressure that is more
than the pre
ssure that is required for the operating
conditions.
•
Diagnosti
c code 0262-03 5 V Sensor DC Power
Supply voltage above normal is not active.
•
Diagnosti
c code 0262-04 5 V Sensor DC Power
Supply voltage below normal is not active.
•
Diagnost
ic code 1797-03 Fuel Rail Pressure
Sensor voltage above normal is not active.
•
Diagnost
ic code 1797-04 Fuel Rail Pressure
Sensor voltage below normal is not active.
•
No diagn
ostic codes are active for the fuel rail
pump.
•
No diagn
ostic codes are active for the fuel injectors.
System Response:
If equipped, the diagnostic lamp will come on and the
event code will be logged.
The engine will derate to 100 percent.
Possi
ble Performance Effect:
The engine will be derated until the keyswitch is
turn
ed to OFF and then turned to ON.
Troubleshooting:
The event code does not represent a fault in the
electronic system. This event indicates high fuel
pre
ssure.
A failed relief valve, the fuel pump, or an electronic
uni
t injector may cause the event code to appear.
Results:
•
OK – STOP.
i04016613
E398 Low Fuel Rail Pressu re
Conditions Which Gen erate This Code:
The Electronic Control Module (ECM) detects low
fuel rail pressure under the following conditions:
•
The ECM determines that the expected fuel
rail pressure is lower than the pressure that is
requested b
y the electronic control system.
•
Diagnostic code 0262-03 5 V Sensor DC Power
Supply vol
tage above normal is not active.
•
Diagnostic code 0262-04 5 V Sensor DC Power
Supply vol
tage below normal is not active.
•
Diagnostic code 1797-03 Fuel Rail Pressure
Sensor vo
ltage above normal is not active.
•
Diagnostic code 1797-04 Fuel Rail Pressure
Sensor vo
ltage below normal is not active.
•
No diagnostic codes are active for the fuel rail
pump.
•
No diagnostic codes are active for the fuel injectors.
System Response:
If equi
pped, the diagnostic lamp will come on and the
event code will be logged.
The en
gine will derate to 100 percent.
Possible Pe rformance Effect:
The engine will be derated until the keyswitch is
turned to OFF and then turned to ON.
Troubleshooting:
Low f
uel pressure may be caused by the following
problems:
•
Afa
ult in the fuel return system
•
A fault in the fuel pressure control
•
A leak in the high-pressure fuel system
•
Af
ailed relief valve, the fuel pump, or an electronic
unit injector
Th
e event code does not represent a fault in the
electronic system.