Komatsu Galeo PC800-8 User Manual

72 PC800, 850-8
SEN00790-02 40 Troubleshooting
Failure code [CA386] Sens Supply 1 Volt High Error
Action code Failure code
Trouble
Sens Supply 1 Volt High Error
(Engine controller system)
E15 CA386
Contents of
trouble
• High voltage error occurred in sensor power supply 1 (5V) circuit.
Action of
controller
• Common rail pressure sensor limits output and continues operation (limits common rail pressure).
Problem that
appears on
machine
• Engine output lowers.
Related
information
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1 Defect in related system If another failure code is displayed, carry out troubleshooting for it.
2
Defective sensor
(Internal defect)
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Disconnect sensors at
right in order. If no
error code is displayed,
that sensor is defec-
tive.
Common rail pressure
sensor
PFUEL connector
3
Disconnection in wiring har-
ness
(Disconnection in wiring or
defective contact in connec-
tor)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (33) –
PFUEL (female) (1)
Resis-
tance
Max. 1 z
Wiring harness between ENG (female) (47) –
PFUEL (female) (3)
Resis-
tance
Max. 1 z
4
Ground fault in wiring har-
ness
(Short circuit with GND cir-
cuit)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (33) –
PFUEL (female) (1) and chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between ENG (female) (47) –
PFUEL (female) (3) and chassis ground
Resis-
tance
Min. 1 Mz
5
Short circuit in wiring har-
ness
(with another wiring har-
ness)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (33) –
PFUEL (female) (1) and between ENG
(female) (47) – PFUEL (female) (3)
Resis-
tance
Min. 1 Mz
6 Defective engine controller
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
ENG Voltage
Between (33) – (47) 4.75 – 5.25 V

Komatsu Galeo PC800-8 Specifications

General

Brand	Komatsu
Model	Galeo PC800-8
Category	Excavators
Language	English