Komatsu 114E-3 Series - E-15 Code [227;CA227] Abnormally high level in sensor power supply 2 circuit

SEN00459-01 40 Troubleshooting
28 114E-3 Series
E-15 Code [227/CA227] Abnormally high level in sensor power supply 2
circuit 1
Circuit diagram related to sensor power supply 2
Error code Failure code
Trouble Abnormally high level in sensor power supply 2
227 CA227
Contents of
trouble
• High voltage is detected in sensor power supply 2 circuit.
Action of con-
troller
• Fixes charge pressure and charge temperature, and continues operation.
• Limits output and continues operation.
Problem that
appears on
machine
• Engine output drops.
Related infor-
mation
• Method of reproducing failure code: Starting switch ON.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1
Defective wiring harness
connector
Connecting parts among each sensor, engine wiring harness, and
engine controller are suspected. Inspect them directly.
• Loose connector, broken lock, broken seal
• Corrosive, bent, broken, forced-in, or extended pin
• Humidity in connector, entry of dirt or dust, poor insulation
2 Defective engine controller
If cause 1 is not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)