Failure Code [Ca115] Eng Ne And Bkup Speed Sens Error - Komatsu PC88MR-10 Shop Manual

40 Troubleshooting
Troubleshooting by failure code (Display of code)

Failure code [CA115] Eng Ne and Bkup Speed Sens Error

Action level Failure code
L04 CA115
Detail of
Both signals from engine Ne speed sensor and engine Bkup speed sensor are unusual.
failure
Action of
None in particular.
controller
Engine stops.
Problem on
Engine does not start.
machine
Related
Method of reproducing failure code: Start engine.
information
No. Cause
Poor connection of sensor
1
connector
Defective Ne speed sensor
2
system
Defective Bkup speed sensor
3
system
Defective engine controller
4
40-128
Engine Ne and Bkup Speed Sensor Error
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
Connectors of engine Ne speed sensor and Bkup sensor may be poorly
(incorrectly) connected. Check their connection.
Perform troubleshooting for failure code [CA689].
Perform troubleshooting for failure code [CA778].
If no failure is found by above checks, engine controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
(PC88MR-CA115-400-A-Z0-A)
PC88MR-10