Failure Code [Ca331] Injector #2 (L #2) System Open/Short Error - Komatsu PC130-8 Shop Manual

SEN04119-01

Failure code [CA331] Injector #2 (L #2) system open/short error

User code Failure code
E11
Contents of
• There is disconnection or short circuit in injector #2 circuit.
trouble
Action of
• None in particular.
controller
Problem that
• Output drops.
appears on
• Rotation is unstable.
machine
Related
• Method of reproducing failure code: Start engine.
information
Defective injector #2 (Inter-
1
nal trouble)
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Possible causes
and standard
value in normal
state
Ground fault in wiring har-
3 ness (Short circuit with GND
circuit)
Defective injector or wiring
4
harness of another cylinder
5 Defective engine controller
50
Trouble
CA331
Cause
Injector #2 (L #2) system open/short error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CN2 (male)
Between (1) – (2)
Between (1), (2) – chassis
ground
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between ENG1 (female)
(45) – CN2 (female) (2)
Wiring harness between ENG1 (female)
(58) – CN2 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between ENG1 (female)
(45) – CN2 (female) (2) and chassis ground
Wiring harness between ENG1 (female)
(58) – CN2 (female) (1) and chassis ground
If another failure code for injector abnormality is displayed, carry
out troubleshooting for it.
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
ENG1 (female)
Between (45) – (58)
Between (45), (58) – chassis
ground
40 Troubleshooting
1
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
PC130-8