Failure Code [B@Bcns] Eng Water Overheat - Komatsu PC200-8M0 Shop Manual

SEN06133-00

Failure code [B@BCNS] Eng Water Overheat

Action
Failure code
level
L02 B@BCNS
q
While engine is running, voltage from engine coolant temperature sensor drops, and engine con-
Detail of failure
troller detects engine coolant overheated.
Action of con-
q
Displays engine coolant temperature monitor in red on machine monitor.
troller
Problem on
q
If machine is operated as it is, engine may seize up.
machine
q
Signal voltage of engine coolant temperature sensor is input to engine controller that transmits in-
formation to machine monitor through CAN communication system.
Related infor-
q
Engine coolant temperature can be checked with monitoring function
mation
(Code: 04107 Engine coolant temperature)
q
Method of reproducing failure code: Start engine.
Cause
Overheating of engine coolant
1
(when system is normal)
Defective engine coolant tempera-
2
ture sensor system
14
40-301
Engine water overheat
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
Engine coolant may overheat. Check it and remove cause if it overheats.
If no failure is found by checks on cause 1, engine coolant temperature sensor
system may be defective. Perform troubleshooting for failure codes [CA144]
and [CA145].
301 Troubleshooting by failure code, Part 1

Failure code [B@BCNS] Eng Water Overheat

PC200, 200LC, 220, 220LC-8M0