Failure Code [Dxa9Kb] Pc-Epc (R) Sol Short - Komatsu PC210-8 Shop Manual

40 Troubleshooting

Failure code [DXA9KB] PC-EPC (R) Sol Short

User code Failure code
E02 DXA9KB
Contents of
• When PC-EPC (R) solenoid was driven, short circuit was detected in circuit.
trouble
Action of • Turns output to PC-EPC (R) solenoid OFF.
controller
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on
• If pump load increases, engine speed lowers largely and engine may stall.
machine
• Drive current of PC-EPC (R) solenoid can be checked with monitoring function.
Related infor-
(Code: 01302 PC-EPC solenoid current (R))
mation
• Method of reproducing failure code: Turn starting switch ON.
Defective PC-EPC (R) sole-
1 noid (Internal short circuit or
ground fault)
Defective emergency pump
2 drive switch (Internal short
circuit or ground fault)
Possible causes
and standard
value in normal
state
Ground fault in wiring har-
3 ness (Contact with GND cir-
cuit)
4 Defective pump controller
PC210, 230, 240-8
PC-EPC (R) solenoid system short
Trouble
(Pump controller system)
Cause
a Prepare with starting switch OFF, then carry out troubleshooting
Between (1) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
Between (8), (9) –
Between (8), (9) –
chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between C02 (female) (104)
– S25 (female) (9)
Wiring harness between S25 (female) (8) –
V12 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
Between (104) – (115), (117),
Between (104) – chassis ground
Standard value in normal state/Remarks on troubleshooting
without turning starting switch ON.
V12 (male)
Between (1) – (2)
without turning starting switch ON.
Emergency pump
S25 (male)
drive switch
(10)
without turning starting switch ON.
without turning starting switch ON.
C02 (female)
(120)
UEN00243-01
Resistance
7 – 14 z
Min. 1 Mz
Resistance
Min. 1 Mz
Normal
Min. 1 Mz
Resis-
tance
Resis-
tance
Resistance
7 – 14 z
Min. 1 Mz
1
Min. 1 Mz
Min. 1 Mz
9