Failure Code [B@Bczk] Engine: Low Coolant Level - Komatsu WA250-6 Shop Manual

SEN03841-00

Failure code [B@BCZK] Engine: Low coolant level

Action code Failure code
E01 B@BCZK
Contents of
• Radiator coolant level switch signal circuit was opened (disconnected from GND) for 30 seconds.
trouble
Action of
• Turns radiator coolant level caution lamp ON.
machine monitor
Problem that
appears on
• If machine is used as it is, engine may overheat.
machine
Related
• Operation of radiator coolant level switch can be checked with monitoring function.
information
(Monitoring code: MONITOR PANEL – 40903 – D-IN-27)
Low radiator sub-tank cool-
1
ant level
Defective radiator coolant
2
level switch (Internal defect)
Possible causes
and standard
value in normal
Disconnection in wiring har-
state
ness (Disconnection in wiring
3
or defective contact in con-
nector)
4 Defective machine monitor
14
40-310
Engine: Low coolant level
Trouble
(Machine monitor system)
Causes
System is normal.
a Radiator sub-tank coolant level may be low. Check and add cool-
ant, if necessary.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (1) – (2)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between L27 (female) (10) –
B05 (female) (1)
Wiring harness between B05 (female) (2) –
ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
310 Troubleshooting by failure code (Display of code), Part 1
Failure code [B@BCZK] Engine: Low coolant level
Standard value in normal state/Remarks on troubleshooting
Sub-tank coolant
M05 (male)
Above low level
Below low level
Sub-tank coolant
L27
Above low level
Between (10) –
ground
Below low level
Resistance
level
Max. 1 z
(Normal)
Min. 1 Mz
Resis-
tance
Resis-
tance
Voltage
level
Max. 1 V
(Normal)
20 – 30 V
WA250, 250PZ-6
Max. 1 z
Max. 1 z