SEN00460-01 40 Troubleshooting
8 114E-3 Series
E-31 Code [428/CA428] Water Sensor High Level Error 1
Error code Failure code
Trouble Abnormally high level in water sensor
428 CA428
Contents of
trouble
• High voltage occurred in water-in-fuel sensor
Action of con-
troller
• None in particular.
Problem that
appears on
machine
• Water separator monitor does not indicate normally.
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 water-in-fuel sen-
sor
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
P47 (female) Resistance
Between (1) – (2) Max. 10 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) (14) –
P47 (male) (1)
Resis-
tance
Max. 10 z
Wiring harness between J1 (female) (47) –
P47 (male) (2)
Resis-
tance
Max. 10 z
3
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) (14) – J1 (female) (With all connec-
tors of wiring harness disconnected)
Resis-
tance
Min.
100 kz
4
Defective wiring harness
connector
Connecting parts among water-in-fuel sensor, 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
5 Defective engine controller
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
J1 (female) Resistance
Between (14) – (47) Max. 10 z
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