Failure Code [Dxabkb] R Pump Epc Sol. S/C - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DXABKB] R Pump EPC Sol. S/C

Action code Failure code
E02 DXABKB
Contents of
• When main pump EPC (R) solenoid was energized, short circuit was detected in solenoid.
trouble
• Minimizes deliveries of both F and R pumps if trouble occurs during travel.
Action of
• Turns "straight travel solenoid" ON, once lever is set in neutral.
controller
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Travel speed and work equipment speed lower.
machine
• Current to energize main pump EPC (R) solenoid can be checked with monitoring function.
Related
(Code: 01302 Main pump EPC (R) solenoid current)
information
• Method of reproducing failure code: Turn starting switch ON.
Defective main pump EPC
1 (R) solenoid (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 harness
3
(Short circuit with GND circuit)
4 Defective pump controller
56
R Pump EPC Sol. S/C
Trouble
(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 ON.
Between (1) – chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
S25 (male)
Between (8), (9) – (10)
Between (8), (9) –
chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CP03 (female) (16) –
S25 (female) (9) – chassis ground
Wiring harness between S25 (female) (8) – V12
(female) (1) – chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Between (16) – (3), (13), (23)
Between (16) – chassis ground
V12 (male)
Between (1) – (2)
Emergency pump drive
switch
Normal
CP03 (female)
40 Troubleshooting
Resistance
7 – 14 z
Min 1. Mz
Resistance
Min. 1 Mz
Min. 1 Mz
Resistance Min. 1 Mz
Resistance Min. 1 Mz
Resistance
7 – 14 z
Min. 1 Mz
PC800, 850-8