jcb JS 200 Series, Service Manual

Page: 179 / 531

9 - 4
Section C
Electrics
9803/6400
Section C
9 - 4
Issue 2*
Fault Finding
Fault Diagnosis (continued)
Emergency Engine Stop, Problem No.1
Note: Even if the emergency stop button is pressed the message does not go out.
Prior Confirmation
Items
1. The "MODE" of the mode display is not flashing.
2. Confirm that the fuses in the fuse box are normal.
3. The engine does not run.
Troubleshoot Cause Remedy
Defective LW Repair
wiring from switch wiring or
panel or switch panel replace
defective. switch
panel.
Clean CN2
Bad connection of connector
CN2 connector or terminal or
controller defect. replace
controller.
Breakage of LW
wiring between shut
Repair LW
off relay 1 and wiring.
controller.
Defective shut off Replace
relay 1. shut off
relay 1.
Breakage of LR
wiring between shut
Repair LR
off relay 1 and fuse. wiring.
When CN11
connector is
removed, does
message go out?
Remove CN2
connector and
measure voltage
of female side of
LB.
Is it within the
range of 20~30V?
Measure voltage
of LW with shut
down relay 1
connector
connected.
Is it within the
range of 20~30V.
Remove shut off relay 1
connector and measure
resistance of 1 and 2 of
relay side.
Connect 1 to +, 2 to -.
Is it 250 .
YES
YES
YES
YES
NO
NO
NO (°°)
NO
Key switch ON
*