Left Travel" Is Not Displayed Normally In Monitoring Function - Komatsu Galeo PC800-8 Shop Manual

SEN00793-02
E-25 "Left travel" is not displayed normally in monitoring function
Failure • "Left travel" is not displayed normally in monitor-
phenomenon ing function.
Relative
• Monitoring code: 01901 (Pressure switch 2)
information
Defective left travel
forward PPC oil pressure
1 switch
(Internal disconnection or
short-circuiting)
Defective left travel reverse
PPC oil pressure switch
2
(Internal disconnection or
short-circuiting)
Disconnection of wiring
harness
3
(Disconnection or defec-
Possible causes
tive contact with connector)
and standard
value in normal
state
Grounding fault of wiring
harness
4
(Contact with grounding cir-
cuit)
Short-circuiting of wiring
5 harness
(Contact with 24 V circuit)
6 Defective pump controller
52
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 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 CP02 (female) (16) –
J31 – P09 (female) (2) or between CP02
(female) (16) – P10 (female) (2)
Wiring harness between P09 (female) (1) – J18 –
J20 – J19 – J25 – chassis ground
Wiring harness between P10 (female) (1) – J18 –
J20 – J19 – J25 – chassis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Between wiring harness between CP02
(female) (16) – J31 – P09 (female) (2) or
between CP02 (female) (16) – P10 (female) (2)
and chassis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
Between wiring harness between CP02
(female) (16) – J31 – P09 (female) (2) or
between CP02 (female) (16) – P10 (female) (2)
and chassis ground
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
(16) – chassis ground
"Left travel" is not displayed normally in the monitoring
function (special function) of the machine monitor.
P09 (male) Left travel lever
Forward
P10 (male) Left travel lever
Reverse
CP02 Left travel lever
Between
Forward or reverse
40 Troubleshooting
Resistance
Neutral Min. 1 Mz
Max. 1 z
Resistance
Neutral Min. 1 Mz
Max. 1 z
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
Voltage
Neutral 20 – 30 V
Max. 1 V
PC800, 850-8
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Max. 1 V