Kubota 07-CR-E5 - Abnormal Black Smoke Emitted

COMMON RAIL SYSTEM
07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
1-S54
(8) Abnormal Black Smoke Emitted
Possible causes:
1. Fuel feed pump operation fault.
*Refer to the previous "List of malfunction causes by symptom" for the subsequent details.
2. Engine fault
• Low compression pressure.
• Engine internal fault
• Valve clearance fault
• Valve timing fault
• Engine oil viscosity fault
3. Control system
• Damage to the pulsar gear of the crankshaft position sensor
• Air gap of the crankshaft position sensor is large
• SCV operation fault
• EGR valve fault
4. Intake system
• Air cleaner clogging
• Leak from the intake system parts
• Turbocharger operation fault
5. Fuel system
• Supply pump learning has not been performed
• Fuel quality
• Fuel pressure limiter fault
• Fuel line clogging, leak
6. CRS (including the wiring harness)
• Output system (supply pump, injector and common rail)
• Input system (sensors and switches)
• Engine ECU
9Y3200007CRS0083US0
1. Check the Fuel Feed Pump Operation
1. Turn the key switch ON and check that the fuel feed pump is
operating.
9Y3200007CRS0027US0
2. Check the DTC
1. Turn the key switch ON and check the DTC.
DTC presently existing
Past DTC only
9Y3200007CRS0084US0
Service
specification
Operates when the key switch is turned ON.
OK Go to "2. Check the DTC".
NG Check in accordance with "6.[2] FUEL SYSTEM INSPECTION
PROCEDURE - 5. Check the Fuel Feed Pump". (Refer to page 1-S324)
(1) Fuel Feed Pump
Service
specification
No DTC is output.
OK Go to "3. Check the Intake System".
NG Check in accordance with the troubleshooting procedures for each DTC.
OK Go to "3. Check the Intake System".
NG Reproduce defect by referring to the freeze frame data, etc.
(a) CAN1 Connector
KiSC issued 03, 2022 A