Failure Code [Ca386] Sensor Sup. 1 Volt. High Error - Komatsu Galeo PC138US-8 Shop Manual

SEN02464-01

Failure code [CA386] Sensor sup. 1 volt. high error

User code Failure code
E15
Contents of
• High voltage was detected in sensor power supply 1 (5 V) circuit.
trouble
Action of • Limits output of common rail pressure sensor and continues operation (Limits common rail pres-
controller sure).
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
8
Trouble
CA386
Causes
Sensor sup. 1 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
at right in order. If
error code disap-
Common rail pres-
pears when a device
is disconnected, that
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)
– PFUEL (female) (1)
Wiring harness between CE01 (female) (48)
– PFUEL (female) (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (36)
– PFUEL (female) (1) and chassis ground
Wiring harness between CE01 (female) (48)
– PFUEL (female) (3) 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)
– PFUEL (female) (1) and
wiring harness between CE01 (female) (48)
– PFUEL (female) (3)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CE01
Between (36) – (48)
40 Troubleshooting
PFUEL connector
sure 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