Komatsu PC130-8 User Manual

SEN04121-02 40 Troubleshooting
10 PC130-8
Failure code [DAFRMC] CAN discon (Monitor detected) 1
User code Failure code
Trouble
CAN disconnection (Monitor detected)
(Machine monitor system)
E0E DAFRMC
Contents of
troubl
e
• Machine monitor detected communication error in CAN communication circuit between pump con-
troller and engine controller.
Action of
ma
chine monitor
• If cause of failure disappears, system reset
s itself.
Problem that
appears on
machine
• Information may not be transmitted normally by CAN communica
tion and machine may not operate
normally. (Trouble phenomenon depends on failed section.)
Related
information
• Method of reproducing failure code: T
urn starting switch ON.
Possible causes
and
standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Disconnection in wiring har-
ness (Disconnection in wiring
or
defective contact in con-
nector)
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CM02 (female) (8),
(9) –
CP01 (female) (45), – CE02 (female)
(1), – K02 (female) (A)
Resis-
tance
Max. 1 z
Wiring harness between CM02 (female)
(10) –
CP01 (female) (64), – CE02 (female)
(21), – K02 (female) (B)
Resis-
tance
Max. 1 z
2
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CM02 (female) (8),
(9) –
CP01 (female) (45), – CE02 (female)
(1), – K02 (female) (A), – N08 (male) (3) and
chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between CM02 (female)
(10) –
CP01 (female) (64), – CE02 (female)
(21), – K02 (female) (B), – N08 (male) (10)
and chassis ground
Resis-
tance
Min. 1 Mz
3
Hot short (Short circuit with
24V circuit)
in wiring harness
a Prep
are with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between CM02 (female) (8),
(9) –
CP01 (female) (45), – CE02 (female)
(1), – K02 (female) (A), – N08 (male) (3) and
chassis ground
Voltage
Max.
5.5 V
Wiring harness between CM02 (female)
(10) –
CP01 (female) (64), – CE02 (female)
(21), – K02 (female) (B), – N08 (male) (10)
and chassis ground
Voltage
Max.
5.5 V
4
Defective CAN terminal
re
sistance (Internal short cir-
cuit or disconnection)
a Prep
are with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
K02 (male) Resistance
Between (A) – (B) 120 ± 12 z
5 Defective machine monitor
If causes 1 – 4 are not detected, ma
chine monitor may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English