Failure Code [Dy20Ka] Wiper Working Abnormality - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DY20KA] Wiper Working Abnormality

Action code Failure code
— DY20KA
Contents of
• When windshield wiper works, W signal of working ends is not input.
trouble
Action of
• Turns working output to wiper motor OFF.
controller
Problem that
appears on • Windshield wiper motor does not operate.
machine
Related • Input of W signal in wiper working area (ON/OFF) can be checked with monitoring function.
information (Code 04502 Monitor Input 3)
Defective wiper motor
1
(Internal disconnection)
Possible causes
Disconnection in wiring har-
and standard
ness
value in normal
2 (Disconnection in wiring or
state
defective contact in connec-
tor)
3 Defective machine monitor
58
Wiper Working Abnormality
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.
M05 (female)
Between (6) – (5)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CM01 (female) (5) –
M05 (male) (6)
Wiring harness between M05 (male) (5) – chas-
sis ground
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Between (5) –
chassis ground
Wiper blade
Upper operating limit
Other than upper oper-
ating limit
CM01 Wiper blade
Upper operating limit
Other than upper oper-
ating limit
40 Troubleshooting
Resistance
Max. 1 z
Min. 1 Mz
Resistance Max. 1 z
Resistance Max. 1 z
Voltage
Max. 1 V
20 – 30 V
PC800, 850-8