Failure Code [Djf1Ka] Fuel Level Sensor: Disconnection/Hot Short - Komatsu WA250-6 Shop Manual

SEN03846-00

Failure code [DJF1KA] Fuel level sensor: Disconnection/Hot short

Action code Failure code
E01 DJF1KA
Contents of
• Voltage above 4 V was detected in fuel level sensor signal circuit.
trouble
Action of
• None in particular.
machine monitor
Problem that
appears on
• Fuel level gauge does not indicated normally (but keeps indicating "empty").
machine
• Input signal from fuel level sensor can be checked with monitoring function.
Related (Monitoring code: MONITOR PANEL – 04200 – FUEL SENSOR (V))
information (Monitoring code: MONITOR PANEL – 04202 – FUEL SENSOR (%))
• Method of reproducing failure code: Turn starting switch ON.
Defective fuel level sensor
1
(Internal defect)
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
Possible causes
and standard
value in normal
state
Hot short (Contact with 24V
3
circuit) in wiring harness
4 Defective machine monitor
18
40-360
Failure code [DJF1KA] Fuel level sensor: Disconnection/Hot short
Fuel level sensor: Disconnection/Hot short
Trouble
(Machine monitor system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (1) – (2)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between L28 (female) (1) –
R21 (female) (1)
Wiring harness between L26 (female) (6) –
R21 (female) (2)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Between wiring harness L28 (female) (1) –
R21 (female) (1) and ground
(Value is upper limit when empty.)
Wiring harness between L26 (female) (6) –
R21 (female) (2)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Between L28 (1) –
360 Troubleshooting by failure code (Display of code), Part 6
Standard value in normal state/Remarks on troubleshooting
R21 (male) Fuel level
When 1/2
When empty
L26, L28 Fuel level
When 1/2
L26 (6)
When empty
Resistance
When full 7 – 11 z
25 – 35 z
60 – 95 z
Resis-
tance
Resis-
tance
Voltage
Voltage
Voltage
When full 0.1 – 0.4 V
0.7 – 1.0 V
1.4 – 2.0 V
WA250, 250PZ-6
Max. 1 z
Max. 1 z
Max. 2 V
Max. 1 V