Fuel Leak (In High Pressured Fuel System) (Dtc P0093 / 1239-1) - Kubota 07-CR-E5 Manual

07-CR-E5,07-CR-TE5,07-CR-TIE5, 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:
• Lack of fuel (This error occurs when the engine stalls due to lack of fuel and air gets mixed in the fuel line)
• 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
• Suction control valve (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
Fuel leak is judged with following conditions:
• In case, engine speed is more than 1200 min
When the difference of (a) and (b) is 120 mm
pressure limiter
• In case, engine speed is 1200 min
When the difference of (a) and (b) is 400 mm
pressure limiter
Engine warning light:
• ON
Limp home action by engine ECU (system action):
• Output limitation: Approximately 50 % of normal condition
• Speed limitation (Accelerator limitation: 50 %)
• EGR stop
• Intake throttle 100 % open
Recovery from error:
• Key switch turn OFF
-1
(rpm) or higher)]
-1
(rpm):
3
/st or above, (a) is higher than (b), and fuel leak is not from opening
-1
(rpm) or less:
3
/st or above, (a) is higher than (b), and fuel leak is not from opening
1-S155
COMMON RAIL SYSTEM
9Y3200007CRS0192US0
KiSC issued 03, 2022 A