Any Item Is Not Displayed On Machine Monitor - Komatsu Galeo PC800-8 Shop Manual

SEN00793-02
E-8 Any item is not displayed on machine monitor
Failure • Any item is not displayed on machine moni-
phenomenon tor.
Relative
information
Defective circuit breaker
1
No. 1 or fuse No. 10
Disconnection of wiring
harness
2
(Disconnection or defec-
tive contact with connector)
Possible causes
and standard
value in normal
Grounding fault of wiring
state
harness
3
(Contact with grounding cir-
cuit)
4 Defective machine monitor
Circuit diagram related to monitor panel power supply
24
Cause Standard value in normalcy and references for troubleshooting
If the circuit breaker is turned OFF or the fuse is broken, the circuit prob-
ably has grounding fault (See cause 3).
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CM01 (female) (1), (2) –
FB1-10 outlet
Wiring harness between FB1 inlet – B21
Wiring harness between B11 – battery relay ter-
minal M
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CM01 (female) (1), (2) –
FB1-10 outlet and chassis ground
Wiring harness between FB1 inlet – B21 and
chassis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON and OFF position during troubleshooting.
CM01 (female)
Between (1), (2) –
chassis ground
Between (6), (7) –
chassis ground
When the starting switch is turned ON, any item is not
displayed on machine monitor.
Starting switch
ON
OFF
40 Troubleshooting
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage, Resistance
Voltage: 20 – 30 V
Resistance:
Max. 1 z
PC800, 850-8