Code [227/Ca227] Abnormally High Level In Sensor Power Supply 2 Circuit - Komatsu 114E-3 Series Shop Manual

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