Kubota 07-CR-E5 - Pump Seizing (DTC P1274; 523539-2, P1275; 523540-2)

COMMON RAIL SYSTEM
07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
1-S234
(35) Pump Seizing (DTC P1274 / 523539-2, P1275 / 523540-2)
P1274 / 523539-2: Pump seizing 1
Behaviour during malfunction:
• Insufficient output
• Worsening exhaust gas performance
Detection item:
• High pressure 1 error
DTC set preconditions:
• Sensor supply voltage VCC# is normal
• Rail pressure sensor is normal
DTC set parameter (Approximate parameter):
• Rail pressure of 230 MPa (2350 kgf/cm
2
, 33400 psi) or more continues 1 second under the condition of above
800 min
-1
(rpm)
• Rail pressure of 220 MPa (2250 kgf/cm
2
, 31900 psi) or more continues 1 second under the condition of below 800
min
-1
(rpm) [Threshold changes depending on the engine speed. 700 min
-1
(rpm) should be used as a reference]
Engine warning light:
•ON
Limp home action by engine ECU (system action):
• Output limitation: Approximately 50 % of normal condition
• Speed limitation (Accelerator limitation: 50 %)
•EGR stop
• Intake throttle 100 % open
Recovery from error:
• Key switch turn OFF
9Y3200007CRS0359US0
P1275 / 523540-2: Pump seizing 2
Behaviour during malfunction:
• Insufficient output
• Worsening exhaust gas performance
Detection item:
• High pressure 2 error
DTC set preconditions:
• Sensor supply voltage VCC# is normal
• Rail pressure sensor is normal
DTC set parameter (Approximate parameter):
• Rail pressure of above 197 MPa (2010 kgf/cm
2
, 28600 psi), and below 230 MPa (2350 kgf/cm
2
, 33400 psi)
continues total time for 35 seconds under condition of above 800 min
-1
(rpm) [Threshold changes depending on
the engine speed. 2000 min
-1
(rpm) should be used as a reference]
• Or, rail pressure of above 220 MPa (2250 kgf/cm
2
, 31900 psi) continues total time for 1.7 sec. under condition of
below 800 min
-1
(rpm) [Threshold changes depending on the engine speed. 700 min
-1
(rpm) should be used as a
reference]
Engine warning light:
•ON
Limp home action by engine ECU (system action):
• Output limitation: Approximately 50 % of normal condition
• Speed limitation (Accelerator limitation: 50 %)
•EGR stop
• Intake throttle 100 % open
Recovery from error:
• Key switch turn OFF
9Y3200007CRS0360US0
KiSC issued 03, 2022 A