Failure Code [Ca441] Battery Voltage Low Error - Komatsu PC200-8M0 Shop Manual

SEN06134-00

Failure code [CA441] Battery Voltage Low Error

Action
Failure code
level
L04 CA441
q
Detail of failure Low voltage appears in controller power supply circuit.
Action of con-
q
None in particular
troller
q
Problem on Engine stops.
machine q Starting performance is poor.
q Method of reproducing failure code: Turn starting switch to ON position.
Related infor-
q
Power supply voltage to engine controller can be checked with monitoring function.
mation
(Code: 03203 (V))
Cause
1 Loose or corroded battery terminal Battery cable terminal may be loose or corroded. Check it directly.
Loose terminal or partial open cir-
2
cuit at terminal
Defective wiring harness connec-
3
tor
4 Improper battery voltage
5 Defective alternator
6 Defective engine controller
28
40-302
Battery Voltage Low Error
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
Check terminals of alternator, battery relay, ground terminal (T12), etc.
See descriptions of wiring harness and connectors in "c: Electrical equipment"
in "Checks before troubleshooting" of "General information on troubleshoot-
ing", and check them.
1. Turn starting switch to OFF position.
2. Perform troubleshooting with starting switch at OFF position and at engine
cranking.
Between battery terminals (+) and (-).
1. Turn starting switch to OFF position.
2. Insert T-adapters into connector E12.
3. Start engine (Engine speed: Middle or faster).
Between E12 (1) and ground
If no failure is found by above checks, engine controller is defective. (Since
this is an internal defect, troubleshooting cannot be performed.)
q
Reference
1. Turn starting switch to OFF position and disconnect battery ground cable.
2. Insert T-adapters into connector CE03.
3. Connect battery ground cable.
4. Measure voltage with starting switch at ON position and when starting
engine.
Between CE03 (3) and
(1)
Between CE03 (3) and
(1)
302 Troubleshooting by failure code, Part 2

Failure code [CA441] Battery Voltage Low Error

Starting switch: ON
Starting switch: START
PC200, 200LC, 220, 220LC-8M0
Voltage 20 to 30 V
Voltage 27.5 to 29.5 V
Voltage 20 to 30 V
Voltage Min. 12 V