16-24 ELECTRICAL SYSTEM
Install the spark plug cap [A] so that it is aligned with the
line [B] on the cylinder head cover.
Pull up the spark plug cap lightly to make sure of the in-
stallation of the spark plug cap.
Ignition Coil Inspection
Measuring Arcing Distance
The most accurate test for determining the condition of
the ignition coil is made by measuring arcing distance using
the coil tester for the 3-needle method.
Remove the ignition coil (see Ignition Coil Removal).
Measure the arching distance using the coil tester [A].
Connect the ignition coil (with the spark plug cap left in-
stalled on the spark plug lead) [B] to the tester and mea-
sure the arcing distance.
To avoid extremely high voltage shocks, do not
touch the coil or lead.
If the distance reading is less than the specified value, the
ignition coil or spark plug cap is defective.
3 Needle Arcing Distance
To determine which part is defective, measure the arcing
distance again with the spark plug cap removed from the
spark plug lead.
If the arcing distance is subnormal as before, the trouble
is with the ignition coil itself. If the arcing distance is now
normal, the trouble is with the spark plug cap.
7 mm (0.26 in.) or more