Ignition Coil; Peak Voltage Adaptor Inspection; Primary Coil Inspection; Secondary Coil Ispection - Honda Motorcycle Service Manual

IGNITION SYSTEMS
When testing the high tension on the ignition coil secondary
side using the peak voltage adaptor, the inner diode may be
damaged. As a damaged adaptor will cause incorrect peak
voltage readings, always consider a defective adaptor if the
peak voltage readings are all abnormal.
The adaptor diode can be easily checked by the following pro
cedure. Therefore, be sure to check the adaptor before replac-
ing the parts that display an abnormal testing value.
Set the multimeter t o the AC voltage range and measure the
local line voltage.
Then, connect the peak voltage adaptor to the multimeter,
measure the same AC voltage with DC voltage range and
compare it t o AC voltage measured previously.
The adaptor is normal if the DC voltage measured via the
adaptor is 1.4 times of AC voltage.
.
The adaptor is defective if the DC voltage measured via the
adaptor is
0
V.
PEAK VOLTAGE ADAPTOR INSPECTION
uch t h e adaotor iack immediatelv after discon-
I
W+LL OUTLET (LINE VOLTAGE)
. .
necting the adaptor, you may get electrical shock. Be
sure t o disconnect the adaptor after allowing the voltage
t o decrease sufficiently.
IGNITION COlL
NOTE
Measure the peak voltage of the ignition coil primary
side first.
Since the resistance value of the primary coil is inherent-
ly very small, it is difficult t o distinguish it from a shorted
wire. Measure the coil resistance as a guideline for
cheking the coil.
PRIMARY COlL INSPECTION
Measure the resistance between the t w o terminals of the igni-
tion primary coil.
If the resistance value is within the specified range, the coil is
good.
If resistance is
m
(infinite), replace the coil with a new one
SECONDARY COlL INSPECTION
With the spark plug cap on, measure the resistance between
the primary coil terminal and the spark plug cap.
For a double ignition coil, measure the resistance between the
spark plug caps.
If the resistance value is within the specified range, then the
coil is good.
If the resistance is
m
(open wirel, disconnect the spark plug
cap(s) and measure the secondary coil resistance.
PEAK VOLTAGE
ADAp7"
/(WITH PLUG CAP1
Date of Issue: March. 1995
O
HONDA MOTOR CO.,LTD.