Komatsu 80001 User Manual

40 Troubleshooting SEN04121-02
PC130-8
27
Failure code [DW43KB] Travel speed sol short 1
Circuit diagram related
User code Failure code
Trouble
Travel speed solenoid system short
(Pump controller system)
— DW43KB
Contents of
tro
uble
• When output to travel speed shifting solenoid was turned ON, short circuit was detected in circuit.
Action of
controll
er
• Turns output to travel speed shifting solenoid OFF.
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
ap
pears on
machine
• Speed is low at High travel speed position (Machine monitor is set to High but actual speed is about
Middle).
Related
information
• Operating condition of travel speed shifting solen
oid can be checked with monitoring function. 
(Code: 02300 Solenoid 1)
• Method of reproducing failure code
: Start engine + Set travel speed to High + Operate travel lever.
Possible causes
and
standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective travel speed shift-
ing solenoid (Internal discon-
nection)
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V04 (male) Resistance
Between (1) – (2) 20 – 60 z
Between (2) – chassis ground Min. 1 Mz
2
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP02 (female) (87)
– V04 (fe
male) (2) and chassis ground
Resis-
tance
Min. 1 Mz
3 Defective pump controller
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP02 (female) Resistance
Between (87) – (115), (117),
(120)
20 – 60 z
Between (87) – chassis ground Min. 1 Mz

Komatsu 80001 Specifications

General

Brand	Komatsu
Model	80001
Category	Excavators
Language	English