Failure Code [Daj2Kk] Controller Solenoid Power Supply: Low Voltage - Komatsu WA250-6 Shop Manual

SEN03844-00

Failure code [DAJ2KK] Controller solenoid power supply: Low voltage

Action code Failure code
E03 DAJ2KK
• Low voltage was detected in controller solenoid power supply system.
Contents of
(While VIS power supply self-holding relay is ON and battery voltage is above 20 V, solenoid power
trouble
supply voltage below 18 V was detected.)
Action of
• Turns all outputs OFF.
machine monitor
Problem that
• Machine cannot travel.
appears on
• Another failure may not be detected.
machine
Related
• If gear is set in neutral and engine is restarted while solenoid voltage is above 19 V, system is reset.
information
Defective VIS power supply
1
holding relay (Internal defect)
Possible causes
and standard
value in normal
state
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
3 Defective HST controller
28
40-340
Failure code [DAJ2KK] Controller solenoid power supply: Low voltage
Controller solenoid power supply: Low voltage
Trouble
(HST controller system)
Causes
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Replace VIS power
supply holding relay
(L102) with another
relay.
a Prepare with starting switch OFF, then check unit.
Between terminals of
L102 (male) (3) – (5)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between HST (female) (30) –
L102 (female) (3)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between L102 (female) (5) –
fuse FS1 (No. 3)
340 Troubleshooting by failure code (Display of code), Part 4
Standard value in normal state/Remarks on troubleshooting
Condition becomes
normal.
Condition does not
become normal.
When 24 V is applied
between (1) – (2)
When no voltage is
applied between (1) –
(2)
HST
Between (30) – ground
Relay (L102) is
defective.
Relay (L102) is
normal.
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Voltage
20 – 30 V
WA250, 250PZ-6