SEN00460-01 40 Troubleshooting
48 114E-3 Series
E-53 Code [2266/CA2266] Abnormally low level in electric lift pump 1
Error code Failure code
Trouble Abnormally low level in electric lift pump
2266 CA2266
Contents of
trouble
• There is short circuit in electric lift pump actuator drive circuit.
Action of con-
troller
• None in particular.
Problem that
appears on
machine
• Starting performance is poor
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 electric lift pump
(Internal short circuit)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
LIFT PUMP (female) Resistance
Between (1) – (2) Max. 20 z
Between (1) – chassis ground Min. 100 kz
2
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
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)
Resis-
tance
Max.
100 kz
3
Hot short in wiring harness
(Short circuit with 24 V cir-
cuit)
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
Voltage Max. 6 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) (1) – J1 (female) (With all connec-
tors of wiring harness disconnected)
Resis-
tance
Min.
100 kz
5
Defective wiring harness
connector
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
6 Defective engine controller
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
J1 (female) Resistance
Between (1) – (11) Max. 20 z
Between (1) – chassis ground Min. 100 kz
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