Failure Code [Dx19Kb] Motor 1 Solenoid: Ground Fault - Komatsu WA250-6 Shop Manual

SEN03847-00

Failure code [DX19KB] Motor 1 solenoid: Ground fault

Action code Failure code
E03 DX19KB
Contents of
• Ground fault was detected in motor 1 solenoid circuit.
trouble
• Turns motor 1 solenoid output OFF.
• Turns HST safety relay output OFF.
Action of
• Turns clutch EPC solenoid output OFF.
controller
• Even if trouble disappears, system does not reset itself until starting switch is turned OFF.
• Turns the centralized warning lamp and alarm buzzer ON.
• Traction force is decreased.
Problem that
• Travel speed is not limited with speed range selector switch and travel speed control dial.
appears on
• If engine is stopped without applying parking brake securely on slope, machine moves down sud-
machine
denly.
• Following output command values can be checked with monitoring function.
Related
Motor 1 solenoid output: HST – 80000 – MOTOR SOL DIR (mA)
information
HST safety relay output: HST – 40979 – D_OUT_15 (ON/OFF)
Clutch EPC solenoid output: HST – 80100 – CLUTCH SOL DIR (mA)
Defective motor 1 solenoid
1
(Internal defect)
Possible causes
and standard
value in normal
state
Ground fault in wiring har-
2 ness (Contact with GND cir-
cuit)
Defective HST safety relay
3
(L111) (Internal defect)
8
40-370
Motor 1 solenoid: Ground fault
Trouble
(HST controller system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between wiring harness HST (female) (19) –
T06 (female) (1) and ground
• If causes 1 – 2 are not detected, HST controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
370 Troubleshooting by failure code (Display of code), Part 7
Failure code [DX19KB] Motor 1 solenoid: Ground fault
Standard value in normal state/Remarks on troubleshooting
T06 (male)
Between (1) – (2)
Between (1), (2) – ground
1
Resistance
15 – 30 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
WA250, 250PZ-6