Failure Code [B@Bcns] Eng Water Overheat - Komatsu PC88MR-10 Shop Manual

Failure code [B@BCNS] Eng Water Overheat

Action level Failure code
B@BCNS
L02
While engine is running, voltage from engine coolant temperature sensor drops, so engine
Detail of
controller determines that engine coolant is overheated.
failure
Action of
Displays engine coolant temperature monitor red on machine monitor.
controller
Problem on
If machine is operated as it is, engine may seize up.
machine
Signal voltage of engine coolant temperature sensor is input to engine controller that
transmits information to machine monitor through CAN communication system.
Related
Engine coolant temperature can be checked with monitoring function
information
(Code: 04107 Engine coolant temperature)
Method of reproducing failure code: Start engine.
No. Cause
Overheating of engine
coolant
1
(when system is normal)
Defective engine coolant
2
temperature sensor system
PC88MR-10
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. Carry out troubleshooting for failure
codes [CA144] and [CA145].
40 Troubleshooting
Troubleshooting by failure code (Display of code)
(PC400-BaBCNS-400-A-Z0-A)
40-127