Check The Data Related To The Rail Pressure; Check The Fuel System For The Existence Of Air - Kubota V3800-CR-TE4 Diagnosis Manual

V3800-CR-TE4,V3800-CR-TIE4, DM
NOTE
• If the pressure limiter is opened, it will be kept open until the engine stops running. Therefore, the rail
pressure is kept at 40 to 60 MPa (410 to 610 kgf/cm
This point must be considered when measuring the rail pressure.
However, when the engine is stopped and the rail pressure reduces enough, the pressure limiter is closed
and the rail pressure will start to increase again.
• Even when the problem indicated by this DTC cannot be reproduced, the high pressure will have occurred
for certain reasons. Therefore, the cause of the high pressure must be identified.
2
, 5800 to 8700 psi) regardless of its target rail pressure.

1. Check the Data Related to the Rail Pressure

1. Connect the diagnosis tool to the CAN1 connector, and select
the "Actual rail pressure" and "Target rail pressure" on the data
monitor.
2. Observe the data signals by operating the accelerator pedal and
others and by performing the actual run test.
The "Actual rail pressure" always follow to the "Target rail
pressure"
1. When idling:
40 to 50 MPa (410 to 500 kgf/cm
2. Accelerator opening 0 → 100 % (During acceleration):
Factory Maximum value 95.0 to 130 MPa (969 to 1320 kgf/cm
specification 13800 to 18800 psi)
3. No-load maximum speed:
95.0 to 115 MPa (969 to 1170 kgf/cm
16600 psi)
4. The numerical value is stable under normal operating and
the target value corresponds with actual pressure value.
OK Use all of the available information and try to reproduce the problem by
operating the accelerator pedal in different ways and by changing the
environmental conditions.
NG Go to "2. Check the Fuel System for the Existence of Air".
(a) CAN1 Connector

2. Check the Fuel System for the Existence of Air

1. Check each joint of the fuel system for the existence of air.
To detect the existence of air effectively, replace the fuel hose
with a transparent one.
OK Go to "3. Check the Fuel System".
NG Locate the position of the fuel leakage in the piping and repair it.
(1) Fuel Hose
1-S131
COMMON RAIL SYSTEM
9Y1200192CRS0204US0
2
, 5800 to 7200 psi)
2
, 13800 to
9Y1200192CRS0205US0
[A] M60 Series
[B] M-GX Series
9Y1200192CRS0920US0
KiSC issued 05, 2012 A
2
,