Failure Code [Aa10Nx] Air Cleaner Clogging - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02629-03

Failure code [AA10NX] Air cleaner Clogging

Action code Failure code
— AA10NX
Contents of • While engine was running, signal circuit of air cleaner clogging switch detected clogging of air
trouble cleaner (sensor contact opened).
Action of • Displays air cleaner clogging monitor on machine monitor.
machine monitor • If cause of failure disappears, system resets itself.
Problem that
appears on • If machine is operated as it is, engine may be damaged.
machine
• Condition of air cleaner clogging switch signal can be checked with monitoring function.
Related infor-
(Code: 04501 Monitor input 2)
mation
• Method of reproducing failure code: Start engine.
Clogging of air cleaner
1
(when system is normal)
Defective air cleaner clog-
2 ging switch
(internal disconnection)
Possible causes
and standard
Disconnection in wiring har-
value in normal
ness
state
3 (Disconnection in wiring or
defective contact in connec-
tor)
4 Defective machine monitor
6
Air cleaner clogging
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
a
a
Between (1) – (2)
a
Wiring harness between CM02 (female) (4) –
P23 (female) (1)
Wiring harness between P23 (female) (2) –
chassis ground
a
Between (4) – chas-
Check the air cleaner for clogging and then clean or replace it if
clogged.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
P23 (male) Air cleaner
Value in normal state
Value when clogged
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
CM02 Air cleaner
Value in normal state
sis ground
Value when clogged
40 Troubleshooting
1
Resistance
Max. 1 z
Min. 1Mz
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Voltage
Max. 1 V
20 – 30 V
PC300, 350-8