Failure Code [Ca429] Water In Fuel Sensor Low Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02630-05

Failure code [CA429] Water in Fuel Sensor Low Error

Action code Failure code
E15
Contents of
• Low voltage was detected in signal circuit of water-in-fuel sensor.
trouble
Action of con-
• None in particular.
troller
Problem that
appears on • Water separator monitor does not display normally.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
Defective water-in-fuel sen-
1
sor
Ground fault in wiring har-
ness
2
(Short circuit with GND cir-
cuit)
Possible causes
Short circuit in wiring har-
and standard
3 ness
value in normal
(with another wiring harness)
state
Defective wiring harness
4
connector
5 Defective engine controller
12
Trouble
CA429
Cause
Water-in-fuel sensor low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
C28 (male)
Between (1) – (2)
Between (1) – chassis ground
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CE01 (female) (14)
– C28 (female) (1) and chassis ground
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Between CE01 (female) (14) – each of CE01
(female) pins (With all wiring harness con-
nectors disconnected)
Connecting parts between water-in-fuel sensor – engine wiring har-
ness – engine controller may be defective. Check them directly.
• Looseness of connector, breakage of lock, or breakage of seal
• Corrosion, bend, breakage, push-in, or expansion of pin
• Moisture or dirt in connector or defective insulation
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CE01 (female)
Between (14) – (47)
Between (14) – chassis ground
40 Troubleshooting
1
Resistance
10 – 100 kz
Min. 100 kz
Resis- Min.
tance 100 kz
Resis- Min.
tance 100 kz
Resistance
10 – 100 kz
Min. 100 kz
PC300, 350-8