Ignition System Inspection; Ignition Coil Primary Peak Voltage - Honda CB250N Shop Manual

Ignition
System
ignition
System
Inspection
NOTE
,
•
If
no
spark
jumps
at
all
plug,
check
all
connections
for
loose or
poor contact before measuring peak
voltage.
•
The
reading differs
depending on the multitester input
impedance. Therefore, use only
Honda
genuine
digital
multitester or
commercially
available multitesters with
the input
impedance higher than
10 Mfl/DCV.
• If
using Imrie diagnostic tester
(model 625), follow
the
manufacturer's
instructions.
Connect
the
peak
voltage
adaptor
to
the
digital
multitester.
Imrie
diagnostic
tester
(model 625)
made
in
Australia or
Peak voltage adaptor
07HGJ
—
00201 00
with
Digital multitester
07411—0020000
Ignition Coil
Primary
Peak Voltage
NOTE
Check
all
system connections before
inspection.
Poor
connected connectors can cause
incorrect readings.
Check
that the
cylinder
compression
is
normal and
the
spark
plug
is
installed
correctly in
all
cylinders.
Place the
motorcycle on
its
center stand and
shift into neutral.
Remove
the spark
plug
caps from
the plugs
on
cylinder head,
install a
known
good
spark plugs
to
the
plug
caps and ground
it
to
the engine as
shown.
Connect
the
peak voltage adaptor
©
probe
to
the
ignition
coil
primary (black/yellow) wire terminals and the
Q
probe
to
the
body
ground.
Turn
the ignition
switch
ON
and engine stop switch
is
to
RUN.
Crank
the engine with
starter
motor and read the
ignition
coil
primary peak
voltage.
Connection:
Black/yellow wire terminal
© —
Body ground
©
Peak
voltage:
100
V
minimum
E—
•
To
avoid
possible
electrical
shock
during voltage
meas-
urements, do
not
touch
test
probe metal
parts.
If
the
peak
voltage
is
abnormal, check an open
circuit
or poor-
ly
connected connectors
in
black/yellow wires.
If
no
defects
are
found
in
the harness,
refer to the troubleshoot-
ing chart (page 14-3).
(1)
DIGITAL MULTITESTER
(1)
GOOD KNOWN
SPARK PLUGS
1
4-5