SEN03842-00
40-320 30 WA250, 250PZ-6
320 Troubleshooting by failure code (Display of code), Part 2
Failure code [CA227] Sensor power supply 2 high error
Failure code [CA227] Sensor power supply 2 high error 1
Related circuit diagram
Action code Failure code
Trouble
Sensor power supply 2 high error
(Engine controller system)
E03 CA227
Contents of
trouble
• High voltage is detected in sensor power supply 2 circuit.
Action of
controller
• Fixes boost pressure and continues operation.
• Fixes charge temperature and continues operation.
• Limits output and continues operation.
• Turns the centralized warning lamp and alarm buzzer ON.
Problem that
appears on
machine
• Engine output drops.
Related
information
• Method of reproducing failure code: Turn the 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.)
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