Failure Code [Ca442] Battery Voltage High Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02630-05

Failure code [CA442] Battery Voltage High Error

Action code Failure code
E10
Contents of
• There is high voltage (36 V or higher) in controller power supply circuit.
trouble
Action of con-
• None in particular.
troller
Problem that
appears on • Engine may stop.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
1 Defective battery voltage
Possible causes
and standard
value in normal
2 Defective alternator
state
3 Defective engine controller
18
Trouble
CA442
Cause
Battery voltage high error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Battery
Between (+) – (–) terminals
a
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
Alternator
R terminal – chassis
Medium or higher
ground
a
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CE03
Between (3) – (1)
40 Troubleshooting
Voltage
Max. 32 V
Engine speed
27.5 – 29.5 V
Voltage
Max. 32 V
PC300, 350-8
1
Voltage