Failure Code [Dy20Ka] Wiper Working Abnormality - Komatsu PC130-8 Shop Manual

SEN04122-01

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
(Code: 02204 Switch input 5)
information
• 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
10
Wiper working abnormality
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
M05 (female)
Between (6) – (5)
Between (1) – (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP01 (female) (56)
– M05 (male) (6)
Wiring harness between M05 (male) (5) –
J04 – chassis ground (T05, T06)
Wiring harness between CP02 (female) (114)
– M05 (male) (1)
Wiring harness between CP02 (female) (119)
– M05 (male) (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP01 (female)
Between (56) –
chassis ground
Between (114) – (119)
40 Troubleshooting
Wiper blade
Operating range top
Other than operating
range top
All range
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Wiper blade
Operating range top
Other than operating
range top
All range
1
Resistance
Max. 1 z
Min. 1 Mz
Max. 20 z
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z
Resistance
Max. 1 z
Min. 1 Mz
Max. 20 z
PC130-8