Failure Code [B@Bazk] Eng Oil Level Low - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02629-03

Failure code [B@BAZK] Eng Oil Level Low

Action code Failure code
— B@BAZK
Contents of • When starting switch is turned ON (but engine is not started), signal circuit of engine oil level switch
trouble detected low engine oil level (sensor contact opened).
Action of
• Displays engine oil level monitor on machine monitor.
machine moni-
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
tor
Problem that
appears on • If machine is operated as it is, engine may be damaged.
machine
• Engine oil level switch signal can be checked with monitoring function.
Related infor-
(Code 04501: Monitor Input 2)
mation
• Method of reproducing failure code: Turn starting switch ON.
Lowering of engine oil level
1
(when system is normal)
Defective engine oil level
2 switch
(Internal disconnection)
Possible causes
and standard
Disconnection in wiring har-
value in normal
ness
state
3 (Disconnection in wiring or
defective contact in connec-
tor)
4 Defective machine monitor
Circuit diagram related to engine oil level switch of machine monitor
12
Engine oil level low
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
a
a
Between (1) – chas-
a
Wiring harness between CM02 (female) (2) –
P44 (female) (1)
a
Between (2) – chas-
Check the engine oil level and add new oil.
(If this phenomenon frequently occurs, investigate the cause.)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
P44 (male) Engine oil level
Value in normal state
Value when oil level is
sis ground
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CM02 Engine oil level
Value in normal state
Value when oil level is
sis ground
40 Troubleshooting
Resistance
Max. 1 z
Min. 1Mz
low
Resis-
tance
Voltage
Max. 1 V
20 – 30 V
low
PC300, 350-8
1
Max. 1 z