Error Code [104] (Clogging Of Air Cleaner) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [104] (Clogging of air cleaner)

User code Error code
– 104
Contents of • The signal circuit of the air cleaner clogging switch is opened (disconnected from the chassis ground)
trouble while the engine is running.
Action of
• None in particular.
monitor panel
Problem that
appears on • If the machine is operated as it is, the engine may be damaged.
machine
• If the air cleaner clogging monitor of the monitor panel flashes while the engine is running, this error
Related code is recorded.
information • The input state (ON/OFF) from the air cleaner clogging switch can be checked with the monitoring func-
tion. (Code: 046, Right of upper line)
Clogging of air cleaner
1
(When system is normal)
Defective air cleaner clog-
2 ging switch (Internal dis-
connection)
Possible causes
and standard
value in normal
Disconnection in wiring
state
harness (Disconnection in
3
wiring harness or defective
contact in connector)
4 Defective monitor panel
Circuit diagram related to air cleaner clogging switch
20-310
(1)
Trouble Clogging of air cleaner(Monitor panel system)
Cause Standard value in normal state/Remarks on troubleshooting
Check the air cleaner. If it is clogged, clean or replace it.
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
A31 (male)
Between (1) and (2)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Wiring harness between P02 (female) (5) and
A31 (female) (1)
Wiring harness between P11 (female) (2) and
chassis ground (A15)
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
Between (5) and
chassis ground
Air cleaner
When normal
When clogged
P02 Air cleaner
When normal
When clogged
[104]
Resistance
Max.1 z
Min.1 Mz
Max.1 z
Resistance
Max.1 z
Resistance
Voltage
Max. 1 V
20 – 30 V
PC130-7