Failure Code [Dxe4Kb] Attachment Flow Epc Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06137-00

Failure code [DXE4KB] Attachment Flow EPC Short Circuit

Action
Failure code
level
– DXE4KB
q
When service flow throttle EPC solenoid is driven, abnormal current flows and short circuit is de-
Detail of failure
tected .
q
Stops outputting current to service EPC solenoid.
Action of con-
q Even if cause of failure disappears, machine does not become normal until starting switch is turned
troller
to OFF position.
Problem on
q
Attachment does not move.
machine
q
Drive current of service flow adjust EPC solenoid can be checked with monitoring function.
Related infor-
(Code: 01700 Service solenoid current)
mation
q
Method of reproducing failure code: Turn starting switch ON and set machine in breaker mode (B).
Cause
Defective attachment flow rate
adjustment (service current) EPC
1
solenoid (internal short circuit or
ground fault)
Short circuit or ground fault in wir-
2
ing harness
Ground fault in wiring harness
3
(contact with ground circuit)
4 Defective pump controller
30
40-305
Failure code [DXE4KB] Attachment Flow EPC Short Circuit
Attachment Flow EPC Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector V30, and connect T-adapters to male side.
Between V30 (male) (1) and (2)
Between V30 (male) (1) and ground
1. Turn starting switch to OFF position.
2. Disconnect connector C02 and connect T-adapters to female side.
Between C02 (female) (97) and each of (115), (117)
and (120)
Between C02 (female) (97) and ground
a If no failure is found by check on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors C02 and V30, and connect T-adapters to either
female side.
Between C02 (female) (97) or V30 (female) (1) and
ground
If no failure is found by above checks, pump controller is defective. (Since this
is an internal defect, troubleshooting cannot be performed.)
305 Troubleshooting by failure code, Part 5
Resistance
Resistance Min. 1 Mz
Resistance
Resistance Min. 1 Mz
Resistance Min. 1 Mz
PC200, 200LC, 220, 220LC-8M0
3 to 14 z
3 to 14 z