Failure Code [Ca351] Injectors Drive Circuit Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02630-05

Failure code [CA351] Injectors Drive Circuit Error

Action code Failure code
E10
Contents of
• There is error in drive power circuit of injector.
trouble
Action of con-
• Limits output and continues operation.
troller
• Exhaust gas becomes black.
Problem that
• Combustion becomes irregular.
appears on
• Engine output lowers.
machine
• Engine cannot be started.
Related infor-
• Method of reproducing failure code: Start engine.
mation
1 Defect in related system
2 Defective fuse No. 19
Defective relay for engine
3
controller power supply
Possible causes
and standard
value in normal
state
Disconnection in wiring har-
ness
4 (Disconnection in wiring or
defective contact in connec-
tor)
5 Defective engine controller
4
Trouble
CA351
Cause
Injectors drive circuit error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If another failure code is displayed, carry out troubleshooting for it,
too.
If fuse is broken, circuit probably has ground fault.
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 troubleshoot-
ing 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 (T11)
If causes 1 – 4 are not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
40 Troubleshooting
1
Resis- Max.
0.5 z
tance
Resis- Max.
0.5 z
tance
Resis- Max.
10 z
tance
PC300, 350-8