Fuel Leak (In High Pressured Fuel System) (Dtc P0093 / 1239-1) - Kubota V3800-CR-TE4 Diagnosis Manual

V3800-CR-TE4,V3800-CR-TIE4, DM

(6) Fuel Leak (in High Pressured Fuel System) (DTC P0093 / 1239-1)

Behaviour during malfunction:
• Insufficient output
• Worsening exhaust gas performance
• Engine stops in some case
Detection item:
• Fuel leak from high pressured fuel system (Fuel consumption is calculated from the difference of fuel pressure of
before and after the injection, and the error will be detected when excess fuel consumption is found)
DTC set preconditions:
• Battery voltage is normal
• Sensor supply voltage VCC# is normal
• Rail pressure sensor is normal
• Supply pump (SCV) is normal
• Injector and injector drive circuit are normal
• NE signal is active [Engine is operating (700 min
• No DTC of P0087, P0088, P0089
DTC set parameter:
(a): the flow volume which is calculated from the difference of rail pressure (decrease)
(b): total volume of injection and leakage
• When the difference of (a) and (b) is 400 mm
pressure limiter
Engine warning light:
• ON
System action:
• Output limitation: Approximately 50 % of normal condition
• Speed limitation (Accelerator limitation: 50 %)
• Rail pressure limitation: Command pressure ≤ 80 MPa (820 kgf/cm
• EGR stop
Recovery from error:
• Key switch turn OFF
-1
(rpm) or higher)]
3
/st or above, (a) is higher than (b), and fuel leak is not from opening
2
, 12000 psi)
1-S144
COMMON RAIL SYSTEM
9Y1200192CRS0674US0
KiSC issued 05, 2012 A