Swing Lock Monitor Does Not Display Correctly - Komatsu Galeo PC800-8 Shop Manual

SEN00793-02
E-15 Swing lock monitor does not display correctly
Failure

• Swing lock monitor does not display correctly

phenomenon
Relative • Input from the swing lock switch (ON or OFF) can be confirmed in the monitor function.
information (Code No.: 04502 Monitor input 3, 02200: Switch input 1)
Swing lock switch fault
1 (Internal disconnection or
short-circuiting)
Disconnection of wiring
harness
2
(Disconnection or defec-
tive contact with connector)
Possible causes
Grounding fault of wiring
and standard
harness
value in normal
3
(Contact with grounding
state
(GND) circuit)
Short-circuiting of wiring
4 harness
(Contact with 24 V circuit)
5 Defective machine monitor
32
Cause Standard value in normalcy and references for troubleshooting
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
S04 (female)
Between (1) – (2)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness from CM02 (female) (17) – J07
– S04 (male) (1)
Wiring harness from S04 (male) (2) – J03 – chas-
sis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Between wiring harness from CM02 (female)
(17) – J07 – S04 (male) (1), or between CM02
(female) (17) – CP02 (female) (38) 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 from CM02 (female)
(17) – J07 – S04 (male) (1), or between CM02
(female) (17) – CP02 (female) (38) and chassis
ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
(17) – chassis ground
(1) Though the swing lock switch was turned ON, the
swing lock monitor does not light up.
(2) Though the swing lock switch was turned OFF, the
swing lock monitor lights up.
Swing lock switch
CM02 Swing lock switch
Between
40 Troubleshooting
Resistance
OFF Min. 1 Mz
Max. 1 z
ON
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
Voltage
OFF 20 – 30 V
ON Max. 1 V
PC800, 850-8
Max. 1 z
Max. 1 z
Min. 1 Mz
Max. 1 V