Failure Code [Ca322] Inj #1 (L#1) Open/Short Error - Komatsu Galeo PC800-8 Shop Manual

40 Troubleshooting

Failure code [CA322] Inj #1 (L#1) Open/Short Error

Action code Failure code
E11 CA322
Contents of
• Opening or short circuit was detected in injector #1 circuit.
trouble
Action of
• None in particular.
controller
Problem that
• Engine output lowers.
appears on
• Speed is unstable.
machine
Related
information
Defective injector #1
1
(Internal defect)
Disconnection in wiring
harness
2 (Disconnection in wiring or
defective contact in con-
nector)
Possible causes
and standard
value in normal
Ground fault in wiring har-
state
ness
3
(Short circuit with GND cir-
cuit)
Defective another cylinder
4
injector or wiring harness
5 Defective engine controller
Circuit diagram related to injector #1
PC800, 850-8
Inj #1 (L#1) Open/Short Error
Trouble
(Engine controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (45) –
CN1 (female) (1)
Wiring harness between ENG (female) (53) –
CN1 (female) (2)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between ENG (female) (45) –
CN1 (female) (1) and chassis ground
Wiring harness between ENG (female) (53) –
CN1 (female) (2) and chassis ground
If multiple failure codes are displayed for injector malfunction, carry out
troubleshooting for them, too.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
CN1 (male)
Between (1) – (2)
Between (1), (2) –
chassis ground
ENG (female)
Between (45) – (53)
Between (45), (53) –
chassis ground
SEN00790-02
Resistance
0.4 – 1.1 z
Min. 1 Mz
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resistance
0.4 – 1.1 z
Min. 1 Mz
57