Code [2266/Ca2266] Abnormally Low Level In Electric Lift Pump - Komatsu 114E-3 Series Shop Manual

SEN00460-01
E-53 Code [2266/CA2266] Abnormally low level in electric lift pump
Error code Failure code
2266 CA2266
Contents of
• There is short circuit 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)
Ground fault in wiring har-
2 ness (Short circuit with GND
circuit)
Hot short in wiring harness
3 (Short circuit with 24 V cir-
Possible causes cuit)
and standard
value in normal
state
Short circuit in wiring har-
4 ness (With another wiring
harness)
Defective wiring harness
5
connector
6 Defective engine controller
48
Trouble Abnormally low level in electric lift pump
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (1) – chassis ground
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)
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) – chassis ground
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.
Between (1) – chassis ground
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
Min. 100 kz
Resis- Max.
tance 100 kz
Voltage Max. 6 V
Resis- Min.
tance 100 kz
Resistance
Max. 20 z
Min. 100 kz
114E-3 Series