Komatsu 114E-3 Series - E-24 Code [325;CA325] Injector No. 6 System Open;Short Error

SEN00459-01 40 Troubleshooting
42 114E-3 Series
E-24 Code [325/CA325] Injector No. 6 System Open/Short Error 1
Error code Failure code
Trouble Disconnection, short circuit in injector No. 6
325 CA325
Contents of
trouble
• There is disconnection or short circuit in drive circuit of injector No. 6.
Action of con-
troller
• None in particular.
Problem that
appears on
machine
• There is irregular combustion or hunting.
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 injector No. 6
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
INJ CYL 5 & 6 (Male) Resistance
Between (1) – (2) Max. 2 z
Between (2) – chassis ground Min. 100 kz
2
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 J1 (female) (57) –
INJ CYL 5 & 6 (female) (2)
Resis-
tance
Max. 2 z
Wiring harness between J1 (female) (59) –
INJ CYL 5 & 6 (female) (1)
Resis-
tance
Max. 2 z
3
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between J1 (female) (57) –
INJ CYL 5 & 6 (female) (2)
Resis-
tance
Max. 2 z
4
Short circuit in wiring harness
(With another wiring harness)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between J1
(female) (57) – J1 (female) (With all connec-
tors of wiring harness disconnected)
Resis-
tance
Min.
100 kz
Wiring harness among all pins between J1
(female) (59) – J1 (female) (With all connec-
tors of wiring harness disconnected)
Resis-
tance
Min.
100 kz
5
Defective wiring harness
connector
Connecting parts among injector No. 6, engine wiring harness, and
engine controller are suspected. Inspect them directly.
• Loose connector, broken lock, broken seal
• Corrosive, bent, broken, forced-in, or extended pin
• Humidity in connector, entry of dirt or dust, poor insulation
6
Defective injector or wiring
harness of another cylinder
If any other failure codes related to injector are displayed, carry out
troubleshooting for them first.
7 Defective engine controller
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
J1 (female) Resistance
Between (57) – (59) Max. 2 z
Between (57) – chassis ground Min. 100 kz