40 Troubleshooting SEN00460-01
114E-3 Series
3
Troubleshooting of electrical system (E-mode), Part 2 1
E-28 Code [351/CA351] INJ. Drive Circuit Error 1
Error code Failure code
Trouble Abnormality in injector drive circuit
351 CA351
Contents of
trouble
• Abnormality occurred in injector drive power supply circuit.
Action of
controller
• Limits output and continues operation.
Problem that
appears
on machine
• Exhaust smoke is black
• There is irregular combustion.
• Engine output drops.
• Engine does not start
Related infor-
mation
• Method of reproducing failure code: Start engine.
Possible
causes and
standard value
in normal state
Causes Standard value in normal state/Remarks on troubleshooting
1 Defective related system If another failure code is indicated, carry out troubleshooting for it.
2 Defective fuse No. 19 If fuse is burnt out, circuit probably has ground fault.
3
Defective relay for engine
controller power supply
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Replace relays for engine controller power supply (R23, R24) with
other relays. If mark E of failure code disappears after reproduction
operation is conducted, that relay has a defect.
4
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between F01-19 – R23, R24
(female) (3)
Resis-
tance
Max.
0.5 z
Wiring harness between R23, R24 (female)
(5) – J3 (female) (3)
Resis-
tance
Max.
0.5 z
Wiring harness between J3 (female) (1) –
chassis ground (T12)
Resis-
tance
Max. 10 z
5 Defective engine controller
If causes 1 – 4 are not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
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