Code [234/Ca234] Eng. Overspeed - Komatsu 114E-3 Series Shop Manual

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