Troubleshooting; Failure Code [Dxa8Ka] Pc-Epc Sol Discon - Komatsu PC130-8 Shop Manual

SEN04122-01

Failure code [DXA8KA] PC-EPC sol discon

User code Failure code
E02 DXA8KA
Contents of
• When PC-EPC solenoid was driven, disconnection was detected in circuit.
trouble
Action of • None in particular (Since no current flows, solenoid does not operate).
controller • If cause of failure disappears, system resets itself.
Problem that
appears on • If pump load increases, engine speed lowers largely and engine may stall.
machine
• Drive current of PC-EPC solenoid can be checked with monitoring function.
Related
(Code: 01300 PC-EPC solenoid current)
information
• Method of reproducing failure code: Turn starting switch ON.
Defective PC-EPC solenoid
1
(Internal disconnection)
Defective emergency pump
2 drive switch (Internal discon-
nection)
Possible causes
and standard
value in normal
state
Disconnection in wiring har-
ness (Disconnection in wiring
3
or defective contact in con-
nector)
4 Defective pump controller
2
PC-EPC solenoid system disconnection
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.
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Between (3) – (2)
Between (6) – (5)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP02 (female) (96)
– S25 (female) (3)
Wiring harness between S25 (female) (2) –
V11 (female) (1)
Wiring harness between CP02 (female)
(115), (117), (120) – S25 (female) (6)
Wiring harness between S25 (female) (5) –
V11 (female) (2)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Between (96) – (115), (117),
V11 (male)
Between (1) – (2)
Emergency pump
S25 (male)
drive switch
Normal
Emergency
Normal
Emergency
CP02 (female)
(120)

40 Troubleshooting

1
Resistance
7 – 14 z
Resistance
Max. 1 z
Min. 1 Mz
Max. 1 z
Min. 1 Mz
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resistance
7 – 14 z
PC130-8