Failure Code [Ca272] Imv/Pcv1 Open Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02629-03

Failure code [CA272] IMV/PCV1 Open Error

Action code Failure code
E10
Contents of
• Opening was detected in drive circuit of supply pump actuator.
trouble
Action of con-
• None in particular.
troller
Problem that
• Engine runs but its operation is unstable.
appears on
• Common rail fuel pressure rises above command value.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
Defective supply pump actu-
1
ator
Disconnection in wiring har-
ness
2 (Disconnection in wiring or
defective contact in connec-
tor)
Ground fault in wiring har-
ness
Possible causes
3
(Short circuit with GND cir-
and standard
cuit)
value in normal
state
Short circuit in wiring har-
4 ness
(with another wiring harness)
Defective wiring harness
5
connector
6 Defective engine controller
48
Trouble
CA272
Cause
IMV/PCV1 open 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.
C17 (male)
Between (1) – (2)
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (2) –
C17 (female) (1)
Wiring harness between CE01 (female) (32)
– C17 (female) (2)
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (2) –
C17 (female) (1) and chassis ground
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Between CE01 (female) (2) – each of CE01
(female) pins (With all wiring harness con-
nectors disconnected)
Connecting parts between supply pump actuator – engine wiring
harness – engine controller may be defective. Check them directly.
• Looseness of connector, breakage of lock, or breakage of seal
• Corrosion, bend, breakage, push-in, or expansion of pin
• Moisture or dirt in connector or defective insulation
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CE01 (female)
Between (2) – (32)
40 Troubleshooting
1
Resistance
Max. 5 z
Resis-
Max. 10 z
tance
Resis-
Max. 10 z
tance
Resis- Min.
tance 100 kz
Resis- Min.
tance 100 kz
Resistance
Max. 5 z
PC300, 350-8