Komatsu SAA6D114E-3 - Code [234;CA234] Eng. Overspeed

40 Troubleshooting SEN00459-01
114E-3 Series
29
E-16 Code [234/CA234] Eng. Overspeed 1
Error code Failure code
Trouble Engine overspeed
234 CA234
Contents of
trouble
• Engine speed is above upper control limit.
Action of con-
troller
• Stops injection of injector until engine speed drops to normal level.
Problem that
appears on
machine
• Engine speed fluctuates.
Related infor-
mation
• Method of reproducing failure code: Start engine and run it at high idle.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1 Use of improper fuel Check fuel used directly
2 Improper way of use Way of use may be improper. Teach proper way of use to operator.
3 Defective engine controller
If causes 1 and 2 is not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)