Failure Code [B@Bcns] Eng Coolant Overheat - Komatsu PC130-8 Shop Manual

SEN04119-01

Failure code [B@BCNS] Eng coolant overheat

User code Failure code
— B@BCNS
Contents of • While engine was running, signal circuit of engine coolant temperature sensor detected overheating
trouble of engine coolant (above about 102°C).
Action of • Displays engine coolant temperature monitor with red on machine monitor.
controller • If cause of failure disappears, system resets itself.
Problem that
appears on • If machine is operated as it is, engine may be seized.
machine
• Engine coolant temperature sensor signal is input to engine controller and then transmitted to
machine monitor.
Related
• Engine coolant temperature can be checked with monitoring function
information
(Code: 04107 Engine coolant temperature)
• Method of reproducing failure code: Start engine.
Overheating of engine
Possible causes
1 coolant (when system is nor-
and standard
mal)
value in normal
state
Defective engine coolant
2
temperature sensor system
10
Engine coolant overheat
Trouble
(Engine controller system)
Cause Standard value in normal state/Remarks on troubleshooting
Engine coolant may be overheating. Check it and remove cause if
it is overheating.
If cause 1 is not detected, engine coolant temperature sensor sys-
tem may be defective. Carry out troubleshooting for failure codes
[CA144] and [CA145].
40 Troubleshooting
1
PC130-8