Code [2265/Ca2265] Abnormally High Level In Electric Lift Pump - Komatsu 114E-3 Series Shop Manual

SEN00460-01
E-52 Code [2265/CA2265] Abnormally high level in electric lift pump
Error code Failure code
2265 CA2265
Contents of
• There is disconnection in electric lift pump actuator drive circuit.
trouble
Action of con-
• None in particular.
troller
Problem that
appears on • Starting performance is poor
machine
Related infor-
• Method of reproducing failure code: Starting switch ON.
mation
Defective electric lift pump
1 (Internal short circuit, discon-
nection)
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Hot short (Short circuit with
Possible causes
3 12 V circuit) in wiring har-
and standard
ness
value in normal
state
Short circuit in wiring har-
4 ness (With another wiring
harness)
Defective wiring harness
5
connector
6 Defective engine controller
46
Trouble Abnormally high level in electric lift pump
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between J1 (female) (1) –
LIFT PUMP (female) (1)
Wiring harness between J1 (female) (11) –
LIFT PUMP (female) (2)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between J1 (female) (1) –
LIFT PUMP (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness among all pins between J1
(female) (1) – J1 (female) (With all connec-
tors of wiring harness disconnected)
Connecting parts among electric lift pump, engine wiring harness,
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.
Standard value in normal state/Remarks on troubleshooting
LIFT PUMP (female)
Between (1) – (2)
J1 (female)
Between (1) – (11)
40 Troubleshooting
1
Resistance
Max. 20 z
Resis-
Max. 10 z
tance
Resis-
Max. 10 z
tance
Voltage Max. 6 V
Resis- Min.
tance 100 kz
Resistance
Max. 20 z
114E-3 Series