SEN04120-03 40 Troubleshooting
24 PC130-8
Failure code [CA731] Eng. Bkup speed sensor phase error 1
User code Failure code
Trouble
Eng. Bkup speed sensor phase error
(Engine controller system)
E15 CA731
Contents of
trouble
• Engine Bkup speed sensor circuit detected abnormality in phase.
Action of
controller
• Controls with signals of engine Ne speed sensor.
Problem that
appears on
machine
• Running engine stops (when Ne speed sensor is also abnormal).
• Stopped engine cannot be started (when Ne speed sensor is also abnormal).
Related
information
• Method of reproducing failure code: Start engine.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective engine Ne speed
sensor system
Engine Ne speed sensor may be defective. Carry out trouble-
shooting for failure code [CA698].
2
Defective engine Bkup
speed sensor system
Engine Bkup speed sensor may be defective. Carry out trouble-
shooting for failure code [CA778].
To Next Page
Loading...
Need help?
General
