Failure Code [Dy20Ka] Wiper Working Abnormality - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

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 • 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
52
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 troubleshooting
without turning starting switch ON.
Between (6) – (5)
Between (1) – (3)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CP01 (female) (56)
– M05 (male) (6)
Wiring harness between M05 (female) (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 troubleshooting
without turning starting switch ON.
CP01 (female)
Between (56) –
chassis ground
Between (114) – (119)
M05 (female) Wiper position
Operating range both
Other than operating
range both ends
All range
Wiper position
Operating range both
Other than operating
range both ends
All range
40 Troubleshooting
Resistance
Max. 1 z
ends
Min. 1 Mz
Max. 20 z
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resistance
Max. 1 z
ends
Min. 1 Mz
Max. 20 z
PC300, 350-8
1
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z