Failure Code [Dy20Ka] Wiper Working Abnormality - Komatsu PC210-8 Shop Manual

40 Troubleshooting

Failure code [DY20KA] Wiper Working Abnormality

User 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
• If cause of failure disappears, system resets itself.
Problem that
appears on
• Wiper motor does not work.
machine
• Condition of W contact signal of wiper working area can be checked with monitoring function.
Related infor-
(Code: 02204 switch 5)
mation
• Method of reproducing failure code: Turn starting switch ON + Set wiper switch to INT or ON.
Defective wiper motor (Inter-
1
nal disconnection)
Possible causes
Disconnection in wiring har-
and standard
ness (Disconnection in wiring
value in normal
2
or defective contact in con-
state
nector)
3 Defective pump controller
PC210, 230, 240-8
Wiper working abnormality
Trouble
(Pump controller system)
Cause
a Prepare with starting switch OFF, then carry out troubleshooting
Between (6) – (5)
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between C01 (female) (56) –
M05 (male) (6)
Wiring harness between M05 (female) (5) –
J04 – chassis ground (T05, T06)
a Prepare with starting switch OFF, then carry out troubleshooting
Between (56) – chas-
Standard value in normal state/Remarks on troubleshooting
without turning starting switch ON.
M05 (female) Wiper blade
Operating range top
Other than operating
without turning starting switch ON.
without turning starting switch ON.
C01 (female) Wiper blade
Operating range top
Other than operating
sis ground
UEN00243-01
Resistance
Max. 1 z
Min. 1 Mz
range top
Resis-
tance
Resis-
tance
Resistance
Max. 1 z
Min. 1 Mz
range top
1
Max. 1 z
Max. 1 z
27