Boom Raise" Is Not Correctly Displayed In Monitor Function - Komatsu Galeo PC800-8 Shop Manual

SEN00793-02
E-18 "Boom RAISE" is not correctly displayed in monitor function
Failure • "Boom RAISE" is not correctly displayed in mon-
phenomenon itor function
Relative
• Monitoring code: 01900 (Pressure switch 1)
information
Boom RAISE PPC hydrau-
lic switch fault
1
(Internal disconnection or
short-circuiting)
Disconnection of wiring
harness
2
(Disconnection or defec-
tive contact with connector)
Possible causes
and standard
Grounding fault of wiring
value in normal
harness
state
3
(Contact with grounding
(GND) circuit)
Short-circuiting of wiring
4 harness
(Contact with 24 V circuit)
5 Defective pump controller
Circuit diagram related to boom RAISE PPC hydraulic switch
44
Cause Standard value in normalcy and references for troubleshooting
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
Between (1) – (2)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CP03 (female) (10) –
P06 (female) (2)
Wiring harness between P06 (female) (1) – J17
– J19 – J25 – chassis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CP03 (female) (10) –
P06 (female) (2) and chassis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
Wiring harness between CP03 (female) (10) –
P06 (female) (2) and chassis ground
aTurn the engine starting switch OFF for the preparations, and start the
engine during the troubleshooting.
(10) – chassis ground
"Boom RAISE" is not correctly displayed in the moni-
tor function on the machine monitor.
R.H. work equipment
P06 (male)
control lever
NEUTRAL
Boom RAISE
R.H. work equipment
CP03
control lever
NEUTRAL
Between
Boom RAISE
40 Troubleshooting
Resistance
Min. 1 Mz
Max. 1 z
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Voltage Max. 1 V
Voltage
20 – 30 V
Max. 1 V
PC800, 850-8