Failure Code [Ca273] Pcv2 Short Error - Komatsu Galeo PC800-8 Shop Manual

40 Troubleshooting

Failure code [CA273] PCV2 Short Error

Action code Failure code
E11 CA273
Contents of
• Short circuit was detected in PCV2 circuit of supply pump.
trouble
Action of
• None in particular.
controller
Problem that
appears on
machine
Related
information
Defective supply pump
1 PCV2
(Internal short circuit)
Ground fault in wiring har-
ness
2
(Short circuit with GND cir-
Possible causes
cuit)
and standard
value in normal
state
Hot short in wiring harness
3 (Short circuit with 24V cir-
cuit)
4 Defective engine controller
Circuit diagram related to supply pump PCV2
PC800, 850-8
PCV2 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) (9) –
PCV2 (female) (1) and chassis ground
Wiring harness between ENG (female) (10) –
PCV2 (female) (2) and chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Wiring harness between ENG (female) (9) –
PCV2 (female) (1) and chassis ground
Wiring harness between ENG (female) (10) –
PCV2 (female) (2) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
PCV2 (male)
Between (1) – (2)
Between (1), (2) –
chassis ground
ENG (female)
Between (9) – (10)
Between (9), (10) –
chassis ground
SEN00790-02
Resistance
2.3 – 5.3 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage Max. 1 V
Voltage Max. 1 V
Resistance
2.3 – 5.3 z
Min. 1 Mz
55