Fiat Kobelco EX355 Tier2, Technical Manual

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T5-4-22 EX355
TROUBLESHOOTING B
E-3 Engine Runs Slower than Normal at
All Operation Speeds.
Slow Idle Speed is Faster or Slower
than Normal.
Related Fault Code: 01
Checking Instructions
•
Before the engine learning operation is carried out,
or when the engine learning operation is made in
a wrong procedure, the engine may run slower at
all operation speeds.
•
If the EC sensor is faulty, the governor lever
position which is located when the key switch is
turned ON, is learned as the idle position. Then,
the engine is controlled based on this engine
learning operation. Accordingly, the engine runs
with discrepancy from the standard control speed.
Further more, this trouble may not reemerge as the
extent of discrepancy in the governor lever posi-
tion differs each time when the key switch is turned
ON.
•
Refer to the Control System Group titled “Engine
Learning Control” in the SYSTEM Section in the
Operational Principle book (Technical Manual).
•
Even if the EC motor control becomes abnormal,
the governor lever position is constantly kept at the
full stroke end since the EC motor is a worm gear
type. Accordingly, the engine does not stall.
NO
YES
Return fuel shut-off
lever to the original
position.
NO
YES
Check if the trouble
is reconditioned
after engine
learning operation
is conducted.
Faulty EC sensor.
NO
YES
Check if fault code
01 is displayed.
Monitor the engine
learning operation.
End.
•
Monitor item:
Engine learning
status.
•
Refer to T5-4-60 for
the engine learning
procedure.
Check if fuel shut-
off lever is fully
operated.
•
Refer to T5-4-60
after replacing EC
sensor.