Failure Code [Daj5Kx] Sensor 5V Power Supply: Out Of Output Range - Komatsu WA250-6 Shop Manual

SEN03844-00

Failure code [DAJ5KX] Sensor 5V power supply: Out of output range

Action code Failure code
E03 DAJ5KX
Contents of
• Sensor 5V power supply of HST controller is below 4.7 V or above 5.3 V.
trouble
Action of • Turns the centralized warning lamp and alarm buzzer ON.
machine monitor
• Even if cause of failure disappears, system does not reset itself until engine is started again.
Problem that
• If this trouble occurs during travel, travel speed may not increase or traction force may be insufficient.
appears on
• Once machine stops, maximum travel speed is about 4 km/h.
machine
• If there is disconnection or ground fault, [DHH1KX], [DDD7KX] or [DF10KA] is displayed, too.
Related
• If there is hot short, [DHH1KY], [DDD7KY] or [DF10KB] is displayed, too.
information
• If this failure occurs during travel, [DLT4KX] or [DLT3KX] may be displayed, too.
Defective travel speed con-
trol dial, defective speed
range selector switch, defec-
1
tive resistor, defective travel
speed sensor, or defective
HST pressure sensor
Possible causes
Ground fault in wiring har-
and standard
2 ness (Contact with GND cir-
value in normal
cuit)
state
Hot short (Contact with 24V
3
circuit) in wiring harness
4 Defective HST controller
34
40-340
Failure code [DAJ5KX] Sensor 5V power supply: Out of output range
Sensor 5V power supply: Out of output range
Trouble
(HST controller system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Disconnect devices at
right in order. If failure
code [DAJ5KX] lights
up (reset is indicated)
when a device is dis-
connected, that device
has trouble in it.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between wiring harness HST (female) (22) –
L54 (female) (A) or L70 (female) (2), (4) or
T09 (female) (1) or T11 (female) (B) and
ground
a Prepare with starting switch OFF, then start engine and carry out
troubleshooting.
Between wiring harness HST (female) (22) –
L54 (female) (A) or L70 (female) (2), (4) or
T09 (female) (1) or T11 (female) (B) and
ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
340 Troubleshooting by failure code (Display of code), Part 4
Standard value in normal state/Remarks on troubleshooting
Travel speed control
dial
Speed range selector
switch
Resistor
Travel speed sensor
HST pressure sensor
HST
Between (22) – (32)
L54
L03
L70
T09
T11
Resis-
Min. 1 Mz
tance
Voltage Max. 1 V
Voltage
4.7 – 5.3
WA250, 250PZ-6