Komatsu SAA6D114E-3 - Code [272;CA272] IMV (IMA) Open Error

SEN00459-01 40 Troubleshooting
32 114E-3 Series
E-19 Code [272/CA272] IMV (IMA) Open Error 1
Error code Failure code
Trouble Disconnection in IMV (IMA)
272 CA272
Contents of
trouble
• There is disconnection in supply pump actuator drive circuit.
Action of
controller
• None in particular.
Problem that
appears
on machine
• Engine speed runs, but in unstable condition.
• Common rail fuel pressure is above command value.
Related infor-
mation
• Method of reproducing failure code: Starting switch ON.
Possible
causes and
standard value
in normal state
Causes Standard value in normal state/Remarks on troubleshooting
1
Defective supply pump actu-
ator
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
CP3 PUMP REGULATOR (Male) Resistance
Between (1) – (2) Max. 5 z
2
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between J1 (female) (2) –
CP3 PUMP REGULATOR (female) (1)
Resis-
tance
Max. 10 z
Wiring harness between J1 (female) (32) –
CP3 PUMP REGULATOR (female) (2)
Resis-
tance
Max. 10 z
3
Hot short (Short circuit with
24V circuit) in wiring harness
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between J1 (female) (2) –
CP3 PUMP REGULATOR (female) (1)
Voltage Max. 3 V
4
Short circuit in wiring har-
ness (with another wiring
harness)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between J1
(female) (2) – J1 (female) (With all connec-
tors of wiring harness disconnected)
Resis-
tance
Min.
100 kz
5
Defective wiring harness
connector
Connecting parts among supply pump actuator, engine wiring har-
ness, and engine controller are suspected.
Inspect them directly.
• Loose connector, broken lock, broken seal
• Corrosive, bent, broken, forced-in, or extended pin
• Humidity in connector, entry of dirt or dust, poor insulation
6 Defective engine controller
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
J1 (Female) Resistance
Between (2) – (32) Max. 5 z