Failure Code [Ca115] Eng. Ne And Bkup Speed Sensor Error - Komatsu Galeo PC138US-8 Shop Manual

40 Troubleshooting

Failure code [CA115] Eng. Ne and Bkup speed sensor error

User code Failure code
E10
Contents of
• Abnormality occurred in Ne speed sensor circuit and Bkup speed sensor circuit simultaneously.
trouble
Action of
• None in particular.
controller
Problem that
• Engine cannot be started (if engine has been stopped).
appears on
• Engine stops (if engine has been running).
machine
Related
information
Defective Ne speed sensor
1
system
Defective Bkup speed sen-
2
sor system
Possible causes Defective mount of Ne speed
3
and standard sensor
value in normal
Defective mount of Bkup
4
state
speed sensor
Defective connection (Wrong
5
connection)
6 Defective engine controller
PC138US, USLC-8
Trouble
CA115
Causes
Eng. Ne and Bkup speed sensor error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
Carry out troubleshooting for failure code [CA689].
Carry out troubleshooting for failure code [CA778].
Check mount of Ne speed sensor directly for defect (defective
installation of sensor, internal of flywheel, etc.)
Check mount of Bkup speed sensor directly for defect (defective
installation of sensor, internal of supply pump, etc.)
Check Ne speed sensor and Bkup speed sensor directly for defec-
tive connection (wrong connection).
If causes 1 – 5 are not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
SEN02463-01
1
13