Komatsu Galeo PC800-8 Shop Manual page 722

SEN00792-02
Single-wiper specification
Action code Failure code
— DY2DKB
Contents of
• Abnormal current flowed at output to wiper motor (for) circuit.
trouble
Action of
• Turns output to wiper motor (for) circuit OFF.
controller
Problem that
appears on • Wiper operation stops.
machine
Related
information
Defective wiper motor
1 (Internal short circuit or
ground fault)
Possible causes
Ground fault in wiring har-
and standard
ness
2
value in normal
(Short circuit with GND cir-
state
cuit)
3 Defective machine monitor
68
Wiper Drive (For) S/C
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Between (3) – chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CM01 (female) (9) –
M05 (male) (3) and chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Between (9) –
chassis ground
M05 (female)
Between (3) – (1)
CM01 Wiper switch
OFF
ON
40 Troubleshooting
Continuity/Resistance
There is continuity
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Voltage
Max. 3 V
Max. 3 V 20 – 30 V
(Constant cycle)
PC800, 850-8