Failure Code [Aa10Nx] Air Cleaner Clogging - Komatsu PC200-8M0 Shop Manual

SEN06133-00

Failure code [AA10NX] Air Cleaner Clogging

Action
Failure code
level
L01 AA10NX
q
Air cleaner clogging switch signal voltage is not 1 V or less while engine is running, and machine
Detail of failure
monitor detects clogging of air cleaner (open of sensor contacts).
Action of con-
q
Displays air cleaner clogging monitor in yellow on machine monitor.
troller
Problem on
q
If machine is operated as it is, engine may be damaged.
machine
q
Input state (ON/OFF) from air cleaner clogging switch can be checked by using monitoring func-
Related infor- tion.
mation (Code 04501: Monitor Input 2)
q
Method of reproducing failure code: Start engine.
Cause
Clogged air cleaner
1
(when system is normal)
Defective air cleaner clogging
2
switch (internal open circuit)
Open circuit in wiring harness
3 (wire breakage or defective con-
tact of connector)
4 Defective machine monitor
q Air cleaner suction resistance
*1: -3,430 Pa Max. {-350 mmH
*2: -7,470 ± 490 Pa {-762 ± 50 mmH
8
40-301
Air cleaner clogging
Failure
(Machine monitor system)
Procedure, measuring location, criteria and remarks
Air cleaner may be clogged, Check it for clogging and then clean or replace if
clogged.
1. Turn starting switch to OFF position.
2. Disconnect connector P23 and connect T-adapter to male side.
3. Start engine.
Between P23 (male) (1)
and (2)
1. Turn starting switch to OFF position.
2. Disconnect connectors CM02 and P23, and connect T-adapters to each
female side.
Between CM02 (female) (4) and P23 (female) (1)
Between P23 (female) (2) and ground
1. Turn starting switch to OFF position.
2. Insert T-adapters into connectors CM01 and CM02.
3. Start engine.
Between CM02 (4) and
CM01 (3)
O}
2
O}
2
301 Troubleshooting by failure code, Part 1

Failure code [AA10NX] Air Cleaner Clogging

When air cleaner
Resistance
works properly *1
When air cleaner
Resistance Min. 1 Mz
is clogged *2
Resistance
Resistance
When air cleaner
Voltage
works properly
When air cleaner
Voltage
is clogged
PC200, 200LC, 220, 220LC-8M0
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 V
7 – 11 V