Failure Code [Ca227] Sensor 2 Supply Voltage High Error - Komatsu PC88MR-10 Shop Manual

Failure code [CA227] Sensor 2 Supply Voltage High Error

Action level Failure code
L03 CA227
Detail of
High voltage occurs in sensor power supply 2 (5 V) circuit.
failure
Ignores signals from Bkup speed sensor and controls engine by using Ne speed sensor
signals.
Ignores signals from ambient pressure sensor, sets ambient pressure to fixed value
(52.44 kPa {0.53 kg/cm
Ignores signals from charge (boost) pressure sensor, sets boost pressure to fixed value
Action of
(400 kPa {4.1 kg/cm
controller
Ignores signals from crankcase pressure sensor, sets crankcase pressure to fixed value
(0 kPa), and runs engine.
Closes EGR valve and opens variable flow turbocharger fully.
Limits engine output and runs engine.
Problem on
Engine output lowers.
machine
Related
Method of reproducing failure code: Turn starting switch to ON position.
information
No. Cause
Defective sensor power
1
supply 2 circuit
PC88MR-10
Sensor 2 Supply Voltage High Error
Failure
(Engine controller system)
2 }), and runs engine.
2 }), and runs engine.
Procedure, measuring location, criteria, and remarks
Perform troubleshooting for failure code [CA187].
40 Troubleshooting
Troubleshooting by failure code (Display of code)
(PC88MR-CA227-400-A-Z0-A)
40-151