SEN02466-00 40 Troubleshooting
8 PC138US, USLC-8
Failure code [DY20KA] Wiper working abnormality 1
User code Failure code
Trouble
Wiper working abnormality
(Pump controller system)
— DY20KA
Contents of
trouble
• When windshield wiper works, W signal of working ends is not input.
Action of
controller
• Turns working output to wiper motor OFF.
• If cause of failure disappears, system resets itself.
Problem that
appears on
machine
• Wiper motor does not work.
Related
information
• Condition of W contact signal of wiper working area can be checked with monitoring function.
(Code: 02204 Switch input 5)
• Method of reproducing failure code: Turn starting switch ON + Set wiper switch to INT or ON.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective wiper motor (Inter-
nal disconnection)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
M05 (female) Wiper blade Resistance
Between (6) – (5)
Operating range top Max. 1 z
Other than operating
range top
Min. 1 Mz
Between (1) – (3) All range Max. 20 z
2
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between C01 (female) (56)
– M05 (male) (6)
Resis-
tance
Max. 1 z
Wiring harness between M05 (female) (5) –
J01 – chassis ground (T09)
Resis-
tance
Max. 1 z
Wiring harness between C02 (female) (114)
– M05 (male) (1)
Resis-
tance
Max. 1 z
Wiring harness between C02 (female) (119)
– M05 (male) (3)
Resis-
tance
Max. 1 z
3 Defective pump controller
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
C01 (female) Wiper blade Resistance
Between (56) – chas-
sis ground
Operating range top Max. 1 z
Other than operating
range top
Min. 1 Mz
Between (114) – (119)
All range Max. 20 z
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