Failure Code [Dw7Jka] Bottom Dump Priority Sol. Disc - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DW7JKA] Bottom Dump Priority Sol. Disc.

Action code Failure code
— DW7JKA
Contents of
• When signal is output to bottom dump priority solenoid circuit, no current flows.
trouble
Action of
• None in particular. (Since circuit is disconnected, current does not flow and solenoid does not operate.)
controller
Problem that
appears on • Since bottom dump priority function does not work, bottom dump speed is low.
machine
Related • Operating condition (ON/OFF) of bottom dump priority solenoid can be checked with monitoring func-
information tion. (Code 02301: Solenoid valve 2)
Defective bottom dump pri-
1 ority solenoid (Internal dis-
connection)
Disconnection in wiring har-
ness (Disconnection in wir-
2
Possible causes
ing or defective contact in
and standard
connector)
value in normal
state
Hot short (Contact with 24V
3
circuit) in wiring harness
4 Defective pump controller
38
Bottom Dump Priority Sol. Disc.
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.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CP03 (female) (28) –
V19 (female) (2)
Wiring harness between V19 (female) (1) –
CP03 (female) (3), (13), (23)
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Wiring harness between CP03 (female) (28) –
V19 (female) (2)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Between (28) – ground
V19 (male)
Between (2) – (1)
CP03 (female)
40 Troubleshooting
Resistance
20 – 60 z
Resistance Max. 1 z
Resistance Max. 1 z
Voltage Max. 1 V
Resistance
20 – 60 z
PC800, 850-8