Failure Code [Daj0Kk] Hst Controller Power Supply: Low Voltage - Komatsu WA250-6 Shop Manual

SEN03844-00

Failure code [DAJ0KK] HST controller power supply: Low voltage

Action code Failure code
E03 DAJ0KK
• Low voltage was detected in HST controller power supply.
Contents of
(While engine was running and alternator voltage was above 20 V, controller voltage was below 18
trouble
V.)
• Turns all outputs OFF.
Action of
• Trouble which may be detected wrongly is not detected.
machine monitor
• Turns the centralized warning lamp and alarm buzzer ON.
Problem that
• Machine cannot travel (in either direction).
appears on
• Another trouble may be detected.
machine
Related • If gear is set in neutral and engine is restarted while controller voltage is above 20 V, system is reset.
information
• Method of reproducing failure code: Turn starting switch ON
1 Defective (Broken) fuse
Disconnection in wiring har-
ness (Disconnection in wiring
Possible causes
2
or defective contact in con-
and standard
nector)
value in normal
state
3 Defective HST controller
20
40-340
Failure code [DAJ0KK] HST controller power supply: Low voltage
HST controller power supply: Low voltage
Trouble
(HST controller system)
Causes
Check fuse FS1 (No. 3) directly.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between HST (female) (1) –
fuse FS1 (No. 3)
Wiring harness between HST (female) (11) –
fuse FS1 (No. 3)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
340 Troubleshooting by failure code (Display of code), Part 4
Standard value in normal state/Remarks on troubleshooting
HST
Between (1), (11) – ground
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Voltage
20 – 30 V
WA250, 250PZ-6