Failure Code [B@Bazg] Eng Oil Press. Low - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02629-03

Failure code [B@BAZG] Eng Oil Press. Low

Action code Failure code
— B@BAZG
Contents of • While engine was running, signal circuit of engine oil pressure switch detected low engine oil pres-
trouble sure (sensor contact opened).
Action of con- • Displays engine oil pressure monitor on machine monitor.
troller • If cause of failure disappears, system resets itself.
Problem that
appears on • If machine is operated as it is, engine may be damaged.
machine
• Engine oil pressure switch signal is input to engine controller and then transmitted to machine moni-
Related infor-
tor.
mation
• Method of reproducing failure code: Start engine
Lowering of engine oil pres-
1 sure
(when system is normal)
Defective engine oil pressure
2 sensor
(Internal defect)
Disconnection in wiring har-
ness
Possible causes
and standard 3 (Disconnection in wiring or
defective contact in connec-
value in normal
state tor)
Ground fault in wiring har-
ness
4
(Short circuit with GND cir-
cuit)
5 Defective engine controller
10
Engine oil pressure low
Trouble
(Engine controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a
a
Between (1) – chas-
a
Wiring harness between CE01 (female) (17)
– C2 (female) (1)
a
Wiring harness between CE01 (female) (17)
– C2 (female) (1) and chassis ground (when
engine is started)
a
Between (17) – chas-
Determine the cause and check the damage to the engine and
then modify it.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
C2 (male) Engine
When started
sis ground
When stopped
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
CE01 Engine
When started
sis ground
When stopped
40 Troubleshooting
1
Resistance
Min. 1Mz
Max. 1 z
Resis-
Max. 1 z
tance
Resis-
Min. 1Mz
tance
Resistance
Min. 1Mz
Max. 1 z
PC300, 350-8