Code [325/Ca325] Injector No. 6 System Open/Short Error - Komatsu 114E-3 Series Shop Manual

SEN00459-01
E-24 Code [325/CA325] Injector No. 6 System Open/Short Error
Error code Failure code
325
Contents of
• There is disconnection or short circuit in drive circuit of injector No. 6.
trouble
Action of con-
• None in particular.
troller
Problem that
appears on • There is irregular combustion or hunting.
machine
Related infor-
• Method of reproducing failure code: Start engine.
mation
1 Defective injector No. 6
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Ground fault in wiring har-
3 ness (Short circuit with GND
circuit)
Possible causes
and standard
value in normal
state
Short circuit in wiring harness
4
(With another wiring harness)
Defective wiring harness
5
connector
Defective injector or wiring
6
harness of another cylinder
7 Defective engine controller
42
Trouble Disconnection, short circuit in injector No. 6
CA325
Causes Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
INJ CYL 5 & 6 (Male)
Between (1) – (2)
Between (2) – chassis ground
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)
Wiring harness between J1 (female) (59) –
INJ CYL 5 & 6 (female) (1)
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)
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)
Wiring harness among all pins between J1
(female) (59) – J1 (female) (With all connec-
tors of wiring harness disconnected)
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
If any other failure codes related to injector are displayed, carry out
troubleshooting for them first.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
J1 (female)
Between (57) – (59)
Between (57) – chassis ground
40 Troubleshooting
1
Resistance
Max. 2 z
Min. 100 kz
Resis-
Max. 2 z
tance
Resis-
Max. 2 z
tance
Resis-
Max. 2 z
tance
Resis- Min.
tance 100 kz
Resis- Min.
tance 100 kz
Resistance
Max. 2 z
Min. 100 kz
114E-3 Series