Failure Code [Dgh1Kx] Hst Oil Temperature Sensor: Ground Fault - Komatsu WA250-6 Shop Manual

SEN03846-00

Failure code [DGH1KX] HST oil temperature sensor: Ground fault

Action code Failure code
E01 DGH1KX
Contents of
• HST oil temperature higher than 150°C was detected. (Ground fault in HST oil temperature signal
trouble
circuit was detected.)
Action of
• HST oil overheat is not detected.
machine monitor
Problem that
appears on
• HST oil temperature gauge indicates maximum.
machine
• Input state from HST oil temperature sensor can be checked with monitoring function.
Related
(Monitoring code: MONITOR PANEL – 04408 – HST OIL TEMP (°C)
information
(Monitoring code: MONITOR PANEL – 04409 – HST OIL TEMP (V)
Defective HST oil tempera-
1
ture sensor (Internal defect)
Possible causes
and standard
value in normal
Ground fault in wiring har-
state
2 ness (Contact with GND cir-
cuit)
3 Defective machine monitor
Related circuit diagram
8
40-360
Failure code [DGH1KX] HST oil temperature sensor: Ground fault
HST oil temperature sensor: Ground fault
Trouble
(Machine monitor system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (1) – (2)
Between (1) (2) and
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between wiring harness L28 (female) (2) –
T10 (female) (1) and ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (2) – ground
360 Troubleshooting by failure code (Display of code), Part 6
Standard value in normal state/Remarks on troubleshooting
T10 (male) HST oil temperature
– (Anytime)
ground
L28 (female) HST oil temperature
Resistance
At 25°C 35 – 50 kz
At 100°C 3.1 – 4.5 kz
Min. 1 Mz
Resis-
tance
Voltage
At 25°C 4.4 – 4.6 V
At 100°C 2.1 – 2.3 V
WA250, 250PZ-6
Min. 1 Mz