50 PC800, 850-8
SEN00793-02 40 Troubleshooting
E-24 “SWING” is not correctly displayed in monitor function
Failure
phenomenon
• “SWING” is not correctly displayed in monitor
function
“SWING” is not correctly displayed in the monitor
function (special function) on the machine monitor.
Relative
information
• Monitoring code: 01901 (Pressure switch 2)
Possible causes
and standard
value in normal
state
Cause Standard value in normalcy and references for troubleshooting
1
Swing PPC hydraulic
switch, left, fault
(Internal disconnection or
short-circuiting)
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
P07 (male)
L.H. work equipment
control lever
Resistance
Between (1) – (2)
NEUTRAL Min. 1 Mz
Swing Left Max. 1 z
2
Swing PPC hydraulic
switch, right, fault
(Internal disconnection or
short-circuiting)
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
P03 (male)
L.H. work equipment
control lever
Resistance
Between (1) – (2)
NEUTRAL Min. 1 Mz
Swing Right Max. 1 z
3
Disconnection of wiring
harness
(Disconnection or defec-
tive contact with connector)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CP03 (female) (29) –
J15 – P03 (female) (2), or wiring harness
between CP03 (female) (29) – P07 (female) (2)
Resis-
tance
Max. 1 z
Wiring harness between P03 (female) (1) – J16 –
J19 – J25 – chassis ground
Resis-
tance
Max. 1 z
Wiring harness between P07 (female) (1) – J16 –
J19 – J25 – chassis ground
Resis-
tance
Max. 1 z
4
Grounding fault of wiring
harness
(Contact with grounding
(GND) circuit)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CP03 (female) (29) –
J15 – P03 (female) (2), or wiring harness
between CP03 (female) (29) – P07 (female) (2)
and chassis ground
Resis-
tance
Min. 1 Mz
5
Short-circuiting of wiring
harness
(Contact with 24 V circuit)
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
Wiring harness between CP03 (female) (29) –
J15 – P03 (female) (2), or wiring harness
between CP03 (female) (29) – P07 (female) (2)
and chassis ground
Voltage Max. 1 V
6 Defective pump controller
aTurn the engine starting switch OFF for the preparations, and start the
engine during the troubleshooting.
CP03
L.H. work equipment
control lever
Voltage
Between
(29) – chassis ground
NEUTRAL 20 – 30 V
Swing Right or left Max. 1 V
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