jcb JS200 Service Manual page 192

Section C
9 - 17
Fault Diagnosis (continued)
Engine Trouble, Problem No 11 (continued)
Key switch ON
Is fuel cut lever on stop side
YES
Remove the stop motor connector
and connect female side (cab side)
to service connector (6 pin).
Measure voltage between LR and
ground, connecting LR to + and
ground to -.
Is it within the range of 20~30V.
YES
NO
To judge if relay is defective
or not, interchanging the
relay with one in the
centralized relay is another
method.
9803/6400
Troubleshoot
NO
NO
Remove the stop motor
connector and attach service
connector to female side.
Confirm continuity between L and
LW. Is the following true?
Key switch ON: Continuity
Key switch OFF: °°
Measure voltage between shut
down relay 1 connector L and
ground, connecting L to + and
ground to -.
Is the following true?
Emergency stop button ON: 0V
Emergency stop button OFF:
20~30V
YES
Electrics
Fault Finding
YES
NO
Section C
Cause
Engine system
Abnormality
Breakage of LR
wiring between stop
motor connector
and CND or between
CND and fuse
Stop motor defect
Shut down relay
defect
Shut down relay 2
Defect or breakage
of L wiring between
shut down 1 and 2
9 - 17
Remedy
Inspect
engine
system.
Repair
LR wiring.
Replace
stop motor.
Replace
shut down
relay 1.
Replace
shut down
relay 2 or
repair L
wiring.
Issue 1