Failure Code [Ca227] Sensor Sup. 2 Volt. High Error - Komatsu Galeo PC138US-8 Shop Manual

SEN02463-01

Failure code [CA227] Sensor sup. 2 volt. high error

User code Failure code
E15
Contents of
• High voltage was detected in sensor power supply 2 (5 V) circuit.
trouble
• Operates Bkup speed sensor with signals of Ne speed sensor.
Action of • Sets atmospheric pressure sensor to default value (52.44 kPa {0.53 kg/cm
controller tion.
• Fixes charge pressure sensor value (400 kPa {4.08 kg/cm
Problem that
appears on • Output drops.
machine
Related
• Method of reproducing failure code: Turn starting switch ON.
information
1 Defective related system
Defective sensor (Internal
2
trouble)
Disconnection in wiring har-
ness
3 (Disconnection in wiring or
defective contact in connec-
Possible causes
tor)
and standard
value in normal
state
Ground fault in wiring har-
ness
4
(Short circuit with GND cir-
cuit)
Short circuit in wiring har-
ness
5
(With another wiring har-
ness)
6 Defective engine controller
30
Trouble
CA227
Causes
Sensor sup. 2 volt. high error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If another failure code is indicated, carry out troubleshooting for it.
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Disconnect devices Bkup speed sensor
at right in order. If
error code disap-
pears when a device
is disconnected, that
Charge pressure
device has a defect
in it.
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (36)
– each sensor (female)
Wiring harness between CE01 (female) (48)
– each sensor (female)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (36)
– each sensor (female) and chassis ground
Wiring harness between CE01 (female) (48)
– each sensor (female) and chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (36)
– each sensor (female) and
Wiring harness between CE01 (female) (48)
– each sensor (female)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CE01
Between (36) – (48)
40 Troubleshooting
2
}) and continues opera-
2 }) and continues operation.
CAM connector
Atmospheric
PAMB connector
pressure sensor
PTIM connector
sensor
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
4.75 – 5.25V
PC138US, USLC-8
1
Max. 1 z
Max. 1 z
Min. 1 Mz
Min. 1 Mz
Min. 1 Mz