Actions For Non-Reoccurring Malfunctions - Kubota V3800-CR-TE4 Diagnosis Manual

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

[4] ACTIONS FOR NON-REOCCURRING MALFUNCTIONS

• In cases where the malfunction does not reoccur, perform the actions below to determine the cause of the
malfunction.
• In cases where the malfunction does not reoccur at the dealer, sales company or workshop, perform the work that
actually caused the malfunction.
• Check the fuel pipe system [including the fuel feed pump (electromagnetic pump) and tank], intake system and
exhaust system.
• If the malfunction does not reoccur, there may be an ECU malfunction. For diagnostic purposes only, temporarily
replace the ECU with a unit that functions normally to perform the check procedure. At the same time, be sure to
perform difference learning for the supply pump and input QR Code for injectors. If there would be no change,
ECU should not be replaced.
Verify that there is no Diagnostic Trouble Code (DTC) stored in the memory.
Using the trouble check sheet as a base, perform a reoccurrence test in
"Reoccurrence" mode. Use this data (engine ECU (PCM) voltage value, etc.)
to determine the cause of the malfunction.
Assume that an electrical system wiring harness or connector is the cause of
the malfunction and vibrate these components by hand to verify whether or
not a malfunction occurs and a DTC is generated.
Assume that an electrical system female connector terminal is the cause of
the malfunction and verify that the connection points are not defective.
Recommended Tools: KOWA Precision Handling
Feeling Tool Set (KLM-10- 20) Depending on the terminal, a matching size
may not be available.
Insert the male terminal that matches the shape of the female terminal and
check for looseness.
Action
Malfunction symptom
Dead battery
–
–
–
1-S6
COMMON RAIL SYSTEM
9Y1200192CRS0863US0
Idle speed
abnormal
Engine will not
engine stall
start
sluggish poor
acceleration
KiSC issued 05, 2012 A