Komatsu PC130-8 User Manual

SEN04120-03 40 Troubleshooting
8 PC130-8
Failure code [CA386] Sensor sup. 1 volt. high error 1
User code Failure code
Trouble
Sensor sup. 1 volt. high error
(Engine controller system)
E15 CA386
Contents of
trouble
• High voltage was detected in sensor power supply 1 (5 V) circuit.
Action of
controller
• Operates Bkup speed sensor with signals of Ne speed sensor.
• Sets atmospheric pressure sensor to default value (52.44 kPa {0.53 kg/cm
2
}) and continues opera-
tion.
• Fixes charge pressure sensor value (400 kPa {4.08 kg/cm
2
}) and continues operation.
• Limits output and continues operation (Limits common rail pressure).
Problem that
appears on
machine
• Output drops.
Related
information
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1 Defective related system If another failure code is indicated, carry out troubleshooting for it.
2
Defective sensor (Internal
trouble)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Disconnect devices
at right in order. If
error code disap-
pears when a device
is disconnected, that
device has a defect
in it.
Bkup speed sensor CAM connector
Atmospheric
pressure sensor
PAMB connector
Charge pressure
sensor
PTIM connector
Common rail
pressure sensor
PFUEL connector
3
Disconnection in wiring har-
ness
(Disconnection in wiring or
defective contact in connec-
tor)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between ENG1 (female)
(36) – each sensor (female)
Resis-
tance
Max. 1 z
Wiring harness between ENG1 (female)
(48) – each sensor (female)
Resis-
tance
Max. 1 z
4
Ground fault in wiring har-
ness
(Short circuit with GND cir-
cuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between ENG1 (female)
(36) – each sensor (female) and chassis
ground
Resis-
tance
Min. 1 Mz
Wiring harness between ENG1 (female)
(48) – each sensor (female) and chassis
ground
Resis-
tance
Min. 1 Mz
5
Short circuit in wiring har-
ness
(With another wiring har-
ness)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between ENG1 (female)
(36) – each sensor (female) and
Wiring harness between ENG1 (female)
(48) – each sensor (female)
Resis-
tance
Min. 1 Mz
6 Defective engine controller
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
ENG1 Voltage
Between (36) – (48) 4.75 – 5.25V

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English