Tab 10-31 Fuel leakage flow from fuel rail items is too high (engine with ICU)
Indication Possible cause Procedure
LS3446-nnA An injection control unit (ICU) or a
pipe or a connecting pipe (if appli-
cable) is defective
•
Find the cause and repair the defective item,
refer to section [section not applicable for
this engine].
Tab 10-32 Fuel pressure in the fuel rail is too high (for X35/-B or X40/-B engine)
Indication Possible cause Procedure
PT3461-62C Control signal is missing or wrong
•
Find out the applicable flow control valve.
•
Related to the necessary engine power
close the 3/2-way valve 10-8752_E0_3-4 in
the HP fuel pipe of the related fuel pump.
Flow control valve of a fuel pump is
defective
•
Clean or replace the defective flow control
valve.
Tab 10-33 Fuel pressure in the fuel rail is too low (for X35/-B or X40/-B engine)
Indication Possible cause Procedure
PT3461-62C Control signal is missing or wrong
•
Find out the applicable flow control valve.
•
Disconnect the cable of the applicable flow
control valve (The related fuel pump sup-
plies the maximum fuel quantity. The pres-
sure control valve of the fuel rail or the other
fuel pump then controls the fuel pressure).
Flow control valve of a fuel pump is
defective
•
Clean or replace the defective flow control
valve.
A fuel pump is defective
•
Replace the defective fuel pump.
X92-B
AA00-0000-00AAA-410C-A
Operation Manual Malfunctions of systems and components
Winterthur Gas & Diesel Ltd.
- 328 - Issue 002 2021-11
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