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IGNITION SYSTEM
No spark
at
either
ignition group
•
If there is no spark
at
either group, the
problem
is
suspected
in
the primary coil side
of the ignition
system
(ignition coil,
or
unit and ignition coil
circuit).
"No Spark"
condition
remains
with
faulty pair
Switch the ignition coil primary
terminal
connection between the faulty pair
and
good
pair. Try spark
test
again.
Remove the
faulty pair ignition coil and
check
the ignition
coil
resistance
(page
15-7).
!
ABNORMAL
"No Spark" condition
shifts
to
other
pair
• Faulty ignition
coil
•
Faulty
spark
plug
wire
I
OUT OF
-
STANDARD
VALUE
Measure resistance
of the
ignition primary
coil
at
spark unit
connector
(page
15-6).
Poor or loose
contact
of ignition coil 4P mini
connector
•
Open circuit between the
unit and
ignition
coil
GOOD
♦
• Faulty spark unit
No spark
at
one plug
(Trouble
in secondary
coil
side)
•
Faulty spark plug is
most
likely.
Replace
(suspected
bad spark plug) with known
good spark plug and conduct spark
test.
SPARK
-*
Original spark plug no good.
T
NO SPARK
I
Put the spark plug wire on and measure resis¬
tance
of ignition secondary coil
(page
15-7).
NORMAL
Conduct
spark test on
good ignition coil.
T
OUT OF STANDARD VALUE
SPARK
I
Remove the spark plug
wire,
and measure the
resistance
of
the
ignition secondary coil (page
-
STANDARD
VALUE
OUT OF
Faulty ignition coil
15-7).
r
GOOD
oor
contact
of spark plug wire
Faulty spark plug wire
i
1R-J.
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