Fiat Kobelco EX355 Tier2, Technical Manual

Page: 270 / 968

EX355 T5-3-5
TROUBLESHOOTING A
Connector (harness end connector terminals seen from the open end side)
Main Controller (22P): “D” is added for each terminal number in the text.
Pump Control Pressure Sensor
2
3
YES
NO
YES
NO
NO
YES
NO
YES
•
Key switch: ON
•
Key switch: ON
•
Specification: 5
±
0.5 V.
•
After replacement,
refer to page T5-4-60.
After switching 4-spool
section side pump
control pressure sensor
with 5-spool section
side pump control
pressure "RETRIAL".
Check if fault codes are
reversed.
FAULT CODE 04
(ABNORMAL PUMP 1 CONTROL PRESSURE)
FAULT CODE 05
(ABNORMAL PUMP 2 CONTROL PRESSURE)
Checking Instruction:
•
It is unlikely for both pump control pressure sen-
sors (for 4-spool section side and in 5-spool section
side control valves) to fail simultaneously. For this
reason, if faults codes 04 and 05 are indicated, the
probable cause is harness failure.
1
1 2 2 3 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22
Faulty harness
between MC and
pump control
pressure sensor.
Faulty MC
Broken harness
between MC and
pump control
pressure sensor
terminal No.3.
Broken harness
between MC and
pump control
pressure sensor
terminal No 1.
Faulty pump control
pressure sensor.
Disconnect pump
control pressure
sensor connector.
Check if voltage
between harness end
connector terminals
No.1 and No.3 is
5
±
0.5 V.
Check if harness
between MC 22P
connector terminal No.
D14 (4-spool side)/No.
D19 (5-spool side) and
pump control pressure
sensor terminal No.2
is broken or
short-circuited.
Check if voltage
between harness end
connector terminals
No.1 and vehicle
frame matches
specification.