Failure Code [Dlt3Kx] Travel Speed Sensor B: Abnormality - Komatsu WA250-6 Shop Manual

SEN03846-00

Failure code [DLT3KX] Travel speed sensor B: Abnormality

Action code Failure code
E03 DLT3KX
Contents of
• While machine was traveling at speed above about 4 km/h, input signal of travel speed sensor B was
trouble
lost.
Action of • Recognizes travel speed by input signal of travel speed sensor A.
controller
• Turns the centralized warning lamp and alarm buzzer ON.
Problem that
appears on
• None in particular.
machine
Related
• If failure code [DLT3KX] and [DLT4KX] (Travel speed sensor A: Abnormality) are turned ON simulta-
information
neously, see causes 6 and after.
Defective travel speed sen-
1
sor (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
Ground fault in wiring har-
3 ness (Contact with GND cir-
cuit)
Hot short (Contact with 24V
4
circuit) in wiring harness
20
40-360
Travel speed sensor B: Abnormality
Trouble
(HST controller system)
Causes
a Prepare with starting switch OFF, then start engine (but do not
travel) and carry out troubleshooting.
a Prepare with starting switch OFF, then start engine, travel at con-
stant speed, and carry out troubleshooting.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between HST (female) (36) –
T09 (female) (4)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between wiring harness HST (female) (36) –
T09 (female) (4) and ground
a Prepare with starting switch OFF, then start engine, travel at con-
stant speed, and carry out troubleshooting.
Between wiring harness HST (36) – T09 (4)
and ground
a Prepare with starting switch OFF, then start engine, travel at con-
stant speed, and carry out troubleshooting.
Between wiring harness HST (36) – T09 (4)
and ground
360 Troubleshooting by failure code (Display of code), Part 6
Failure code [DLT3KX] Travel speed sensor B: Abnormality
Standard value in normal state/Remarks on troubleshooting
T09
Between (1) – (2)
Between (2) – ground
T09
Between (4) – (2)
Voltage
4.7 – 5.3 V
Max. 1 V
Voltage
Below 1 V – Above 4 V
(Changes at regular intervals)
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Below 1 V
– Above
4 V
Voltage
(Changes
at regular
intervals)
Below 1 V
– Above
4 V
Voltage
(Changes
at regular
intervals)
WA250, 250PZ-6