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Diagnostic Trouble Code Table
Code
Part or System
No
Coolant Temp
Code
No
Coolant Temp
Code
No
Coolant Temp
Code
No
Charge Air Temp
Code
No
Boost Pressure
Code
Reading
No
Fuel Temperature
Code
No
Neutral Switch
Code
P0001
Fuel Metering Unit
P0003
Fuel Metering Unit
P0004
Fuel Metering Unit
P0087
Rail Pressure Gover-
nor Deviation
P0088
Rail Pressure Gover-
nor Deviation
P0089
Rail Pressure Gover-
nor Deviation
P0090
Fuel Pressure Control
Valve
Rail Pressure Gover-
nor Deviation
P0091
Fuel Pressure Control
Valve
P0092
Fuel Pressure Control
Valve
P0112
Charge Air Temp
Charge Air Temp
Sensor
P0113
Charge Air Temp
Charge Air Temp
Sensor
P0117
Coolant Temp Sensor
P0118
Coolant Temp Sensor
BY Series Operation Manual
Mode
Under 0°C (32°F)
Over 108°C (226°F)
Over 110°C (230°F)
Over 110°C (230°F)
4BY2 - over 1.9 bar (27.5 psi)
(relative*) or 2.9 bar (42.0 psi)
(absolute**)
6BY2 - over 2.3 bar (33.3 psi)
(relative*) or 3.3 bar (42.9 psi)
(absolute ** )
Over 90°C (194°F)
Only in case of analog throttle
or in case of CAN-fault
(U0001), wrong configuration -
neutral position
Not connected
Short circuit to Ground
Short circuit to B+
Fuel rail pressure out of range
Fuel rail pressure out of range
Fuel rail pressure out of range
Not connected
Fuel rail pressure out of range
Short circuit to Ground
Short circuit to B+
Over 125°C (257°F)
Short circuit to B+
Under -20°C (-4°F)
No connection / short circuit to
Ground
Short circuit to B+
No connection / short circuit to
Ground
© 2008 Yanmar Marine International
TROUBLESHOOTING
Run Or
Engine
Condition
Can
Start
1000 rpm
yes
reduce
yes
reduce
yes
reduce
yes
reduce
yes
reduce
yes
no
no
reduce
yes
no
no
reduce
yes
reduce or
depends
shut off
on fault
reduce or
depends
shut off
on fault
yes
yes
no
no
reduce
yes
reduce
yes
no
no
reduce
yes
reduce
yes
reduce
yes
reduce
yes
reduce
yes
reduce
yes
Check
Engine
Alarm
no
no
alarm
no
alarm
no
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
alarm
65
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Troubleshooting
