10.2.4 Malfunction of the fuel system (XX34NN)
Tab 10-25 Fuel supply temperature is not in the permitted range
Indication Possible cause Procedure
TE3411A The fuel supply system is defective
•
Find the cause and repair the fault.
Tab 10-26 Fuel supply pressure at the engine inlet is too low
Indication Possible cause Procedure
PT3421A The fuel supply system is defective
•
Find the cause and repair the fault.
The fuel does not have the speci-
fied properties
•
Use correct fuel.
Tab 10-27 Fuel leakage flow from the fuel supply unit is too high
Indication Possible cause Procedure
LS3426-27A An HP fuel pipe or a fuel pump is
defective
•
Find the cause and repair the defective item,
refer to section 10.5 Examine the supply unit
for fuel leakage.
Tab 10-28 Temperature difference of the fuel outlet of the two fuel pumps is too high (for X35/-B or
X40/-B engine)
Indication Possible cause Procedure
TE3431-nnA Flow control valve of a fuel pump is
defective
•
Clean or replace the defective flow control
valve.
One of the two fuel pumps is de-
fective
•
Replace the defective fuel pump.
•
As a temporary procedure, close the 3/2-
way valve 10-8752_E0_3-4 in the HP fuel
pipe of the defective fuel pump.
Tab 10-29 Leakage flow from the rail unit is too high
Indication Possible cause Procedure
LS3444-nnA An item of the rail unit is defective
•
Find the cause and repair the defective item,
refer to section 10.6 Examine the rail unit for
leakage.
Tab 10-30 Fuel leakage flow from fuel rail items is too high (engine with FLV)
Indication Possible cause Procedure
LS3446A A flow limiting valve (FLV), a injec-
tor or a pipe is defective
•
Find the cause and repair the defective item,
refer to section 10.7 Examine the FLV or fuel
pipes for fuel leakage.
NOTE: The leakage flow from the FLV is related to the viscosity of the used fuel.
X92-B
AA00-0000-00AAA-410C-A
Operation Manual Malfunctions of systems and components
Winterthur Gas & Diesel Ltd.
- 327 - Issue 002 2021-11
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