Diagnostics; If The Ignition System Stop Working - Yamaha SZR 660 Service Manual

IGNITION
SYSTEM
DIAGNOSTICS
IF
THE
IGNITION
SYSTEM STOP
WORKING
(NO
OR
INTERMITTENT SPARK)
Procedure
Check:
1.
Fuse 20A
(main)
2.
Battery
3.
Spark
plug
4.
Amplitude
of ignition
spark
5.
Spark plug cap resistance
6. ignition winding resistance
7.
Main
switch
8.
Engine stop emergency
switch
9.
Side stand switch
10. Neutral switch
11.2 Diode
1
2.
1
Diode
1 3.
Pick-up
coil
resistance
1
4.
Wiring connections (whole connection
system)
NOTE:
Before making
the inspections mentioned,
remove
the following
parts:
1
Side panel
(left
and
right)
4,
Fuel tank
2.
Seat
5. Air
filter
case
3.
Rear
cowling
To
check functioning defects, use
the following special tools,
Dinamic spark
tester:
P/N.
YM-34487
P/N. 90890-03144
Pocket
tester:
P/N.YU-03112
P/N,
90890-03112
1.
Fuse
20A
(main).
Remove
the fuse.
Connect the pocket
tester (£*x1) to
the
fuse.
Check
the continuity of the fuse.
See
section
"INSPECTION AND
REPLACE-
MENT OF
FUSE"
in
CHAPTER
3,
DISCONTINUITY
I
Replace the
fuse.
o
CONTINUITY
2. Battery.
Check
the battery.
Refer tothe
section
"BATTERY
INSPECTION'
in
CHAPTER
3.
Voltage:
12.8V
or
more
at
20°C (68°F)
INCORRECT
Clean
the battery terminals.
Recharge
or replace
the battery.
Refer
to the
corresponding
section
in
CHAPTER
3,
o
CORRECT
IGNITION
SYSTEM
3.
Spark
plug-
Check
the conditions of the
spark
plug.
Check the type
of
spark plug used.
Check
the electrodes gap.
See the section on
CHAPTER
3 on
"SPARK
PLUG
INSPECTION."
Standard spark
plug:
DPR8EA-9 (NGK), DPR9EA-9 (NGK)
Electrodes gap:
0*8 ~ 0.9
mm
INCORRECT
Correct the electrodes gap or replace the spark
plug.
o CORRECT
4.
Amplitude of the
ignition
spark.
Detach the
spark
plug cap from the spark
plug.
Connect
th
e
dynamic
spark tester
{ 1 )
as
shown
in the figure.
(2)
Spark plug
cap
(3)
Spark plug
Turn
the
main
switch
to
ON
position.
Check
the
amplitude
of the ignition spark.
Start
the engine
and
increase the amplitude
until
the ignition
becomes
intermittent.
Spark amplitude
if
the
ignition
system
is
efficient:
6.0
mm
IN
COMPLIANCE WITH
SPECIFICATIONS
Minimum spark amplitude.
4>
THE
IGNITION
SYSTEM
IS
INEFFICIENT
OR
THERE
IS
NO SPARK
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