24
manual for location of second-
ary ignition coil terminal.
• Verify BLACK test lead is con-
nected to primary ignition coil
negative (-) terminal.
13.View reading on display.
14.If vehicle is DIS, connect test
leads to terminals of the sec-
ondary ignition coil. Repeat
for remaining ignition coils.
15.Test Results - Secondary Coil
• Typical resistance range of
secondary ignition coils is
6.0kΩ - 30.0kΩ.
• Refer to vehicle service
manual for your vehicles re-
sistance range.
Fig. 23
Typical Cylindrical
Ignition Coil
Black
Red
Primary
Coil
Secondary
Coil
16.Repeat test procedure for a
HOT ignition coil.
NOTE: It is a good idea to test
ignition coils when they are both
hot and cold, because the resis-
tance of the coil could change
with temperature. This will also
help in diagnosing intermittent
ignition system problems.
17.Test Results - Overall
Good Ignition Coil:
Resistance
readings in Steps 10, 15 and 16
were within manufacturers speci-
fication.
Bad Ignition Coil:
Resistance
readings in Steps 10, 15 and 16
are not within manufacturers
specification.
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