Error Code [232] (Short Circuit In Pc-Epc Solenoid) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [232] (Short circuit in PC-EPC solenoid)

User code Error code
E02 232
Contents of
• An abnormal current flows in the PC-EPC solenoid circuit.
trouble
• Turns the output to the LS-EPC solenoid circuit OFF.
Action of
• Even if the cause of the failure disappears, the system does not reset itself until the starting switch is
controller
turned OFF.
Problem that
• If the pump load increases, the engine speed lowers largely and the engine may stall (The pump ab-
appears on
sorption torque cannot be controlled).
machine
Related • The output state (current) to the PC-EPC solenoid can be checked with the monitoring function.
information (Code: 013, by 10 mA)
Defective PC-EPC solenoid
1
(Internal short circuit)
Defective emergency pump
2 drive switch (Internal short
circuit or disconnection)
Possible causes
and standard
value in normal
state
Short circuit with chassis
ground in wiring harness
3
(Contact with ground cir-
cuit)
Defective governor and
4
pump controller
20-346
(1)
Short circuit in PC-EPC solenoid
Trouble
(Governor and pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between (1) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
S25 (male)
Between (3) and (4)
Between (3) and
chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between C03 (female) (16) – S25 (female) (3)
wiring harness and chassis ground
Between S25 (female) (2) – V21 (female) (1)
wiring harness and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between (16) and (3), (13), (23)
Between (16) and chassis ground
V21 (male)
Between (1) and (2)
Emergency pump drive
switch
Normal
C03 (female)
[232]
Resistance
7 – 14 z
Min. 1 Mz
Resistance
Min. 1 Mz
Min. 1 Mz
Min. 1 Mz
Resistance
Resistance Min. 1 Mz
Resistance
7 – 14 z
Min. 1 Mz
PC130-7