Komatsu SAA6D114E-3 - Code [111;CA111] Engine Controller Internal Failure; Code [115;CA115] Eng. Ne and Bkup Speed Sensor Error

40 Troubleshooting SEN00459-01
114E-3 Series
3
Troubleshooting of electrical system (E-mode), Part 1 1
E-1 Code [111/CA111] Engine Controller Internal Failure 1
E-2 Code [115/CA115] Eng. Ne and Bkup Speed Sensor Error 1
Error code Failure code
Trouble Abnormality in engine Controller
111 CA111
Contents of
trouble
• Abnormality occurred in memory of engine controller or power supply circuit.
Action of con-
troller
• None in particular.
Problem that
appears on
machine
• Engine stops during operations and engine cannot be started.
Related infor-
mation
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1 Defective engine controller Carry out troubleshooting for failure code [CA757].
Error code Failure code
Trouble Abnormality in engine Ne, Bkup speed sensor
115 CA115
Contents of
trouble
• Abnormality occurred in signals of engine Ne speed sensor and engine Bkup speed sensor circuit.
Action of con-
troller
Problem that
appears on
machine
• Engine stops
• Engine does not start
Related infor-
mation
• Method of reproducing failure code: Start engine.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1
Defective connection of sen-
sor connector
Check Ne speed sensor and Bkup speed sensor directory for defec-
tive connection (wrong connection).