Failure Code [Ca2311] Abnormality In Imv (Ima) Solenoid - Komatsu WA250-6 Shop Manual

SEN03843-00

Failure code [CA2311] Abnormality in IMV (IMA) solenoid

Action code Failure code
E03
Contents of
• Resistance in supply pump actuator circuit is abnormally high or low.
trouble
Action of
• Turns the centralized warning lamp and alarm buzzer ON.
controller
Problem that
appears on
• Engine output drops.
machine
Related
• Method of reproducing failure code: Start engine
information
1 Defect in related system
Defective supply pump actu-
2
ator
Disconnection in wiring har-
ness
3
(Disconnection or defective
contact in connector)
Possible causes
and standard
value in normal
Ground fault in wiring har-
state
4 ness
(Contact with ground circuit)
Defective wiring harness
5
connector
6 Defective engine controller
50
40-330
Trouble
CA2311
Causes
330 Troubleshooting by failure code (Display of code), Part 3
Failure code [CA2311] Abnormality in IMV (IMA) solenoid
Abnormality in IMV (IMA) solenoid
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If another code is displayed, carry out troubleshooting for it.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
CP3 PUMP REGULATOR (male)
Between (1) and (2)
Between (1) and ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between EC1 (female) (2) –
CP3 PUMP REGULATOR (female) (1)
Wiring harness between EC1 (female) (32) –
CP3 PUMP REGULATOR (female) (2)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between EC1 (female) (2) –
CP3 PUMP REGULATOR (female) (1) and
ground
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
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
EC1 (female)
Between (2) and (32)
Between (2) and ground
1
Resistance
Max. 5 z
Min. 100 kz
Resis-
Max. 5 z
tance
Resis-
Max. 5 z
tance
Resis- Min.
tance 100 kz
Resistance
Max. 5 z
Min. 100 kz
WA250, 250PZ-6