Komatsu PC130-8 User Manual

SEN04122-01 40 Troubleshooting
14 PC130-8
Failure code [DY2CKA] Washer drive discon 1
User code Failure code
Trouble
Window washer drive system disconnection
(Pump controller system)
— DY2CKA
Contents of
trouble
• When output to window washer drive system was turned OFF (when ground circuit was connected),
disconnection was detected in circuit.
Action of
controller
• None in particular (Since no current flows, washer motor does not operate).
• If cause of failure disappears, system resets itself.
Problem that
appears on
machine
• Window washer does not operate.
Related
information
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1 Defective fuse No. 4 If fuse is broken, circuit probably has ground fault. (See cause 5.)
2
Defective washer motor
(Internal short circuit or
ground fault)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
M06A (male) Resistance
Between (1) – (2) 5 – 20 z
Between (1), (2) – chassis
ground
Min. 1 Mz
3
Defective assembled-type
diode D02 (Internal short cir-
cuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
D02 (female) Continuity (Resistance)
Between (3) – (7) No continuity (Min. 1 Mz)
4
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 F01 (4) – J03 –
M06A (female) (1)
Resis-
tance
Max. 1 z
Wiring harness between CP01 (female) (3)
– J04 – M06A (female) (2)
Resis-
tance
Max. 1 z
5
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between F01 (4) – J03 –
M06A (female) (1), – D02 (female) (3) and
chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between CP01 (female) (3)
– J04 – M06A (female) (2), – D02 (female)
(7) and chassis ground
Resis-
tance
Min. 1 Mz
6 Defective pump controller
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CP01 (female) Voltage
Between (3) – chassis ground 20 – 30 V

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English