Failure Code [B@Bazg] Engine: Oil Pressure Reduction - Komatsu WA250-6 Shop Manual

SEN03841-00

Failure code [B@BAZG] Engine: Oil pressure reduction

Action code Failure code
E03 B@BAZG
Contents of
• While engine is run, engine oil pressure became lower than operating range.
trouble
Action of • Limits output and continues operation (Limits fuel injection rate and engine speed).
machine monitor
• Turns the centralized warning lamp and alarm buzzer ON.
Problem that
appears on
• Engine output lowers.
machine
Related
• Method of reproducing failure code: Start engine
information
Low engine oil pressure
1
(When the system is normal)
Defective engine oil pressure
2 switch
(Internal trouble)
Possible causes
and standard
value in normal
Ground fault in wiring harness
state
3
(Contact with GND circuit)
4 Defective engine controller
Related circuit diagram
12
40-310
Engine: Oil pressure reduction
Trouble
(Engine controller system)
Causes
Engine oil has potentially gone low. Check the pressure and if it is
below the specified level, locate and eliminate the cause.
a Prepare with starting switch OFF, then start engine and carry out
troubleshooting.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harnesses between EC1 (female)
(17) – OIL PRESSURE SWITCH and ground
a Prepare with starting switch OFF, then start engine and carry out
troubleshooting.
310 Troubleshooting by failure code (Display of code), Part 1
Failure code [B@BAZG] Engine: Oil pressure reduction
Standard value in normal state/Remarks on troubleshooting
OIL PRESSURE SWITCH
Between terminals
EC1
Between (17) and ground
Resistance
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
Min. 1 Mz
WA250, 250PZ-6