Failure Code [Dxe4Ka] Attachment Flow Epc Open Circuit - Komatsu PC200-8M0 Shop Manual

SEN06137-00

Failure code [DXE4KA] Attachment Flow EPC Open Circuit

Action
Failure code
level
– DXE4KA
q
Detail of failure When service flow throttle EPC solenoid is driven, no current flows and ope circuit is detected.
q
Action of con- None in particular (Since no current flows, solenoid is not energized.)
q
troller If cause of failure disappears, machine becomes normal by itself.
Problem on
q
Attachment does not move.
machine
q Drive current of service current 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
1 adjustment (service current) EPC
solenoid (Internal open circuit)
Open or short circuit in wiring har-
2
ness
Open circuit in wiring harness
3 (wire breakage or defective con-
tact of connector)
4 Defective pump controller
28
40-305
Failure code [DXE4KA] Attachment Flow EPC Open Circuit
Attachment Flow EPC Open 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)
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)
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 each
female side.
Between C02 (female) (97) and V30 (female) (1)
Between V30 (female) (2) and each of C02 (female)
(115), (117) and (120)
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
Resistance
Resistance
PC200, 200LC, 220, 220LC-8M0
3 to 14 z
3 to 14 z
Max. 1 z
Max. 1 z