Failure Code [Dgr2Kz] Brake Oil Temperature Sensor: Disconnection/Hot Short - Komatsu WA250-6 Shop Manual

SEN03846-00
Failure code [DGR2KZ] Brake oil temperature sensor: Disconnection/
Hot short
Action code Failure code
E01 DGR2KZ
• Disconnection or hot short was detected in front brake oil temperature signal circuit.
Contents of
Reference: Detection is made by sudden change of brake oil temperature or by logic of comparison
trouble
with HST oil temperature.
Action of
• None in particular.
machine monitor
Problem that
• Brake oil temperature gauge indicates lower limit.
appears on
• Brake may be broken and brake may not work because of brake oil temperature error.
machine
• Input state from front brake oil temperature sensor can be checked with monitoring function.
Related (Monitoring code: MONITOR PANEL – 30201 – F BRAKE OIL (°C)
information (Monitoring code: MONITOR PANEL – 30204 – F BRAKE OIL (V)
• System resets itself after brake oil temperature increases above 25°C.
Defective front brake (axle)
1 oil temperature sensor (Inter-
nal defect)
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
Possible causes
nector)
and standard
value in normal
state
Hot short (Contact with 24V
3
circuit) in wiring harness
4 Defective machine monitor
10
40-360

Failure code [DGR2KZ] Brake oil temperature sensor: Disconnection/Hot short

Brake oil temperature 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 F14 (female) (1) –
L28 (female) (7)
Wiring harness between F14 (female) (2) –
L25 (female) (9)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Between wiring harness F14 (female) (1) –
L28 (female) (7) and ground
Between wiring harness F14 (female) (2) –
L25 (female) (9) and ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between L28 (7) –
360 Troubleshooting by failure code (Display of code), Part 6
Standard value in normal state/Remarks on troubleshooting
F14 (male) Brake oil temperature
L25, L28 Brake oil temperature
L25 (9)
Resistance
At 25°C 35 – 50 kz
At 100°C 3.1 – 4.5 kz
Resis-
tance
Resis-
tance
Voltage
Voltage
Voltage
At 25°C 4.4 – 4.6 V
At 100°C 2.1 – 2.3 V
WA250, 250PZ-6
Max. 1 z
Max. 1 z
Max. 1 V
Max. 1 V