Failure Code [Ca441] Battery Voltage Low Error - Komatsu PC210-8 Shop Manual

40 Troubleshooting

Failure code [CA441] Battery Voltage Low Error

User code Failure code
E10
Contents of
• There is low voltage in controller power supply circuit.
trouble
Action of
• None in particular.
controller
Problem that
• Engine stops.
appears on
• Engine does not start easily.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
Looseness or corrosion of
1
battery terminal
2 Low battery voltage
3 Defective fuse No. 19
Defective relay for engine
4
controller power supply
Disconnection in wiring har-
ness (Disconnection in wiring
Possible causes
5
or defective contact in con-
and standard
nector)
value in normal
state
Ground fault in wiring har-
6 ness (Short circuit with GND
circuit)
Short circuit in wiring har-
7 ness (with another wiring
harness)
PC210, 230, 240-8
Trouble
CA441
Cause
Battery voltage low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
Battery terminal may be loosened or corroded. Check it directly.
a Prepare with starting switch OFF, then keep starting switch OFF
and start engine and carry out troubleshooting in each case.
Battery (1 piece)
Between (+) – (–)
terminals
If fuse is broken, circuit probably has ground fault. (See Cause 6)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Replace relay (R23, R24) for engine controller with another relay
and perform reproducing operation. If "E" of failure code goes off at
this time, replaced relay is defective.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between F01-19 – R23, R24
(female) (3)
Wiring harness between R23, R24 (female)
(5) – CE03 (female) (3)
Wiring harness between CE03 (female) (1) –
chassis ground (T12)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between F01-19 – R23, R24
(female) (3)
Wiring harness between R23, R24 (female)
(5) – CE03 (female) (3)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CE03 (female) (3) –
CE03 (female) (1) pin (with battery terminal
disconnected)
Wiring harness between CE03 (female) (3) –
each of CE02 (female) pins (With battery ter-
minal disconnected)
Wiring harness between CE03 (female) (1) –
each of CE02 (female) pins (With battery ter-
minal disconnected)
UEN00241-01
Starting switch
OFF
START
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
1
Voltage
Min. 12 V
Min. 6.2 V
Max. 10 z
Max. 10 z
Max. 10 z
Min. 100
kz
Max. 10 z
Min. 100
kz
Min. 100
kz
Min. 100
kz
15