Komatsu PC200-8M0, Shop Manual, Page: 806 / 1254

305 Troubleshooting by failure code, Part 5
Failure code [DXE5KB] Merge-divide Main Sol Short Circuit
40-305
34
PC200, 200LC, 220, 220LC-8M0
SEN06137-00
Failure code [DXE5KB] Merge-divide Main Sol Short Circuit
Action
level
Failure code
Failure
Merge-divide Main Solenoid Short Circuit
(Pump controller system)
L01 DXE5KB
Detail of failure
q
When pump merge-divider (main) EPC solenoid is driven, abnormal current flows and short circuit
is detected.
Action of con-
troller
q
Stops outputting current to merge-divider (main) EPC solenoid. (Since no current flows, merge-
divider LS solenoid does not operate, either.)
q
Even if cause of failure disappears, machine does not become normal until starting switch is turned
to OFF position.
Problem on
machine
q
Single operation speed of work equipment and swing is high in fine control mode (L).
q
Machine does not turn easily during travel.
Related infor-
mation
q
Drive current to merge-divider main EPC solenoid can be checked with monitoring function.
(Code: 08000 Merge-divider (main) solenoid current)
q
Method of reproducing failure code: Turn starting switch to ON position.
Cause Procedure, measuring location, criteria and remarks
1
Defective merge-divider main EPC
solenoid (internal short circuit or
ground fault)
1. Turn starting switch to OFF position.
2. Disconnect connector V23, and connect T-adapters to male side.
Between V23 (male) (1) and (2) Resistance 3 to 14
z
Between V23 (male) (1) and ground Resistance Min. 1 M
z
2
Short circuit or ground fault in wir-
ing harness
1. Turn starting switch to OFF position.
2. Disconnect connector C02 and connect T-adapters to female side.
Between C02 (female) (112) and each of (115),
(117) and (120)
Resistance 3 to 14
z
Between C02 (female) (112) and ground Resistance Min. 1 M
z
3
Ground fault in wiring harness
(contact with ground circuit)
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 V23, and connect T-adapters to either
female side.
Between C02 (female) (112) or V23 (female) (1)
and ground
Resistance Min. 1 M
z
4 Defective pump controller
If no failure is found by above checks, pump controller is defective. (Since this
is an internal defect, troubleshooting cannot be performed.)