Failure Code [Ca271] Imv/Pcv1 Short Error - Komatsu PC210-8 Shop Manual

40 Troubleshooting

Failure code [CA271] IMV/PCV1 Short Error

User code Failure code
E10
Contents of
• Short circuit was detected in drive circuit of supply pump actuator.
trouble
Action of
• None in particular.
controller
• Engine speed does not rise from low idle.
Problem that
appears on
• Engine output lowers.
machine
• Common rail fuel pressure rises above command value.
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
Defective supply pump actu-
1
ator
Ground fault in wiring har-
2 ness (Short circuit with GND
circuit)
Possible causes
Short circuit in wiring har-
and standard
3 ness (with another wiring
value in normal
harness)
state
Defective wiring harness
4
connector
5 Defective engine controller
Circuit diagram related to supply pump actuator (metering unit)
PC210, 230, 240-8
Trouble
CA271
Cause
IMV/PCV1 short circuit error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
CP3 PUMP REGULATOR (male)
Between (1) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CE01 (female) (2) –
CP3 PUMP REGULATOR (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CE01 (female) (2) –
each of CE01 (female) pins (With all wiring
harness connectors 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 troubleshooting
without turning starting switch ON.
CE01 (female)
Between (2) – chassis ground
UEN00240-01
1
Resistance
Min. 100 kz
Resis- Min. 100
tance kz
Resis- Min. 100
tance kz
Resistance
Min. 100 kz
51