Failure Code [Ca386] Sens Supply 1 Volt High Error - Komatsu Galeo PC800-8 Shop Manual

SEN00790-02

Failure code [CA386] Sens Supply 1 Volt High Error

Action code Failure code
E15 CA386
Contents of
• High voltage error occurred in sensor power supply 1 (5V) circuit.
trouble
Action of
• Common rail pressure sensor limits output and continues operation (limits common rail pressure).
controller
Problem that
appears on • Engine output lowers.
machine
Related
information
1 Defect in related system
Defective sensor
2
(Internal defect)
Disconnection in wiring har-
ness
3 (Disconnection in wiring or
defective contact in connec-
tor)
Possible causes
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
72
Sens Supply 1 Volt High Error
Trouble
(Engine controller system)
Cause Standard value in normal state/Remarks on troubleshooting
If another failure code is displayed, carry out troubleshooting for it.
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-
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (33) –
PFUEL (female) (1)
Wiring harness between ENG (female) (47) –
PFUEL (female) (3)
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
Wiring harness between ENG (female) (47) –
PFUEL (female) (3) and chassis ground
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)
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Common rail pressure
sensor
tive.
ENG
Between (33) – (47)
40 Troubleshooting
PFUEL connector
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
4.75 – 5.25 V
PC800, 850-8