Failure Code [Ca352] Sens Supply 1 Volt Low Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02630-05

Failure code [CA352] Sens Supply 1 Volt Low Error

Action code Failure code
E15
Contents of
• Low voltage was detected in sensor power supply 1 circuit.
trouble
Action of con-
• Fixes ambient pressure value and continues operation.
troller
Problem that
• Engine output lowers.
appears on
• Engine does not start easily.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
Defective sensor or wiring
1
harness
Possible causes
and standard
value in normal
state
Defective wiring harness
2
connector
3 Defective engine controller
6
Trouble
CA352
Cause
Sensor power supply 1 voltage low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a
Disconnect connector with starting switch OFF, then turn start-
ing switch ON and carry out troubleshooting.
Disconnect sensor
and wiring harness at
Ambient pressure
right in order and
carry out operation to
reproduce trouble. If
"E" of failure code
goes off when sensor
or wiring harness is
Engine wiring har-
disconnected, that
sensor or wiring har-
ness is defective.
Connecting parts between ambient pressure sensor – engine wiring
harness – engine controller may be defective. Check them directly.
• Looseness of connector, breakage of lock, or breakage of seal
• Corrosion, bend, breakage, push-in, or expansion of pin
• Moisture or dirt in connector or defective insulation
If causes 1 and 2 are not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
40 Troubleshooting
C29
sensor
CE01
ness
PC300, 350-8
1