Failure Code [D5Zhl6] Ign C System: Ground Fault/Disconnection - Komatsu WA250-6 Shop Manual

SEN03844-00

Failure code [D5ZHL6] IGN C system: Ground fault/Disconnection

Action code Failure code
E01 D5ZHL6
• Machine monitor detected disconnection or ground fault in C terminal system.
(When engine speed is above 500 rpm and there is alternator R terminal voltage and starting switch
Contents of
is ON, there is not C terminal signal input.)
trouble
a If engine speed above 250 rpm is sensed in 3 seconds after starting switch is turned ON, however,
error is not detected.
Action of • None in particular.
machine monitor
• When starting switch is turned OFF after trouble is repaired, system is reset.
Problem that
appears on
• Engine cannot be started (It may be able to be started, depending on faulty part).
machine
• Input state (ON/OFF) from starting switch C terminal to machine monitor be checked with monitoring
Related function.
information (MONITOR PANEL – 40900 – D-IN-2)
• Method of reproducing failure code: Turn starting switch to START position.
Defective starting switch
1
(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)
4 Defective machine monitor
12
40-340
Failure code [D5ZHL6] IGN C system: Ground fault/Disconnection
IGN C system: Ground fault/Disconnection
Trouble
(Machine monitor system)
Causes
a Prepare with starting switch OFF, then turn starting switch to ON/
OFF/START position and carry out troubleshooting.
Between (3) – ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between L106 (female) (5) –
L25 (female) (2)
Wiring harness between L02 (female) (3) –
L79 (female) (3)
Wiring harness between L79 (female) (6) –
L106 (female) (3)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between wiring harness L02 (female) (3) –
L79 (female) (8) and ground
Between wiring harness L79 (female) (6) –
L106 (female) (3) and ground
Between wiring harness L106 (female) (5) –
L25 (female) (2) and ground
a Prepare with starting switch OFF, then turn starting switch to ON/
OFF/START position and carry out troubleshooting.
Between (2) – ground
340 Troubleshooting by failure code (Display of code), Part 4
Standard value in normal state/Remarks on troubleshooting
Starting switch
L02
Starting switch
L25
Voltage
position
START 20 – 30 V
OFF/ON Max. 1 V
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
position
START 20 – 30 V
OFF/ON Max. 1 V
WA250, 250PZ-6
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Min. 1 Mz
Min. 1 Mz