68 PC800, 850-8
SEN00791-02 40 Troubleshooting
Failure code [DAFRMC] Monitor Comm. Abnormality
Action code Failure code
Trouble
Monitor Comm. Abnormality
(Machine monitor system)
E0E DAFRMC
Contents of
trouble
• Machine monitor detected communication error in CAN communication circuit between pump control-
ler, KOMTRAX controller and engine controller.
Action of
controller
• Fix engine output to E-mode, and limit pump absorption torque to about 80%.
• If cause of failure disappears, system resets itself.
Problem that
appears on
machine
• Output lowers. (Pump absorption torque decreases.)
• As the working load increases, engine may stall.
Related
information
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 connec-
tor)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CM03 (female) (16) –
CE02 (female) (47), – CP02 (female) (22) –
CK01 (female) (7)
Resis-
tance
Max. 1 z
Wiring harnesses between CM03 (female) (15) –
CE02 (male) (46) and – CP02 (females) (32)
–
CK01 (female) (8)
Resis-
tance
Max. 1 z
2
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 CM03 (female) (16) –
CE02 (female) (47), – CP02 (female) (22), –
CK01 (female) (7) – other related circuit and
chassis ground
Resis-
tance
Min. 1 Mz
Wiring harness between CM03 (female) (15) –
CE02 (female) (46), – CP02 (female) (32), –
CK01 (female) (8) – other related circuit and
chassis ground
Resis-
tance
Min. 1 Mz
3
Hot short (Short circuit with
24V circuit) in wiring har-
ness
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Wiring harness between CM03 (female) (16) –
CE02 (female) (47), – CP02 (female) (22), –
CK01 (female) (7) – other related circuit and
chassis ground
Voltage Max. 1 V
Wiring harness between CM03 (female) (15) –
CE02 (female) (46), – CP02 (female) (32), –
CK01 (female) (8) – other related circuit and
chassis ground
Voltage Max. 1 V
4
Defective CAN terminal
resistance
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
K02(male), K03 (male) Resistance
Between (A) – (B) 40 – 80 z
5
Defective machine moni-
tor, engine controller, pump
controller, or KOMTRAX
controller
If causes 1 – 4 are not detected, machine monitor, engine controller,
pump controller, or KOMTRAX controller may be defective. (Since trou-
ble is in system, troubleshooting cannot be carried out.)
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