Kohler Command Pro CV980 - Manual (Page 55)

7.5
Section 7
Electrical System and Components
7
Kill Switch or
‘‘Off’’ Position of
Key Switch Ignition
Modules
Spark Plug
Magnet
Flywheel
(0.28/0.33 mm)
0.011/0.013 in. Air Gap
L1
D1 C1
T1
P S
Spark Plug
L2
SCS
Figure 7-5. Capacitive Discharge (CD) Ignition Module Schematic.
Figure 7-4. Capacitive Discharge Fixed Timing Ignition System.
‘Žȱ’–’—ȱ˜ȱ‘Žȱœ™Š›”ȱ’œȱŒ˜—›˜••Žȱ‹¢ȱ‘Žȱ•˜ŒŠ’˜—ȱ˜ȱ‘ŽȱĚ¢ ‘ŽŽ•ȱ–Š—Žȱ›˜ž™ȱŠœȱ›ŽŽ›Ž—ŒŽȱ˜ȱŽ—’—Žȱ˜™ȱ
dead center.
Troubleshooting CD Ignition Systems
‘Žȱȱ’—’’˜—ȱœ¢œŽ–œȱŠ›ŽȱŽœ’—Žȱ˜ȱ‹Žȱ›˜ž‹•Žȱ
›ŽŽȱ˜›ȱ‘Žȱ•’Žȱ˜ȱ‘ŽȱŽ—’—Žǯȱ‘Ž›ȱ‘Š—ȱ™Ž›’˜’ŒŠ••¢ȱ
Œ‘ŽŒ”’—Ȧ›Ž™•ŠŒ’—ȱ‘Žȱœ™Š›”ȱ™•žœǰȱ—˜ȱ–Š’—Ž—Š—ŒŽȱ
˜›ȱ’–’—ȱŠ“žœ–Ž—œȱŠ›Žȱ—ŽŒŽœœŠ›¢ȱ˜›ȱ™˜œœ’‹•Žǯȱ
ŽŒ‘Š—’ŒŠ•ȱœ¢œŽ–œȱ˜ȱ˜ŒŒŠœ’˜—Š••¢ȱŠ’•ȱ˜›ȱ‹›ŽŠ”ȱ
˜ —ȱ‘˜ ŽŸŽ›ǰȱœ˜ȱ‘Žȱ˜••˜ ’—ȱ›˜ž‹•Žœ‘˜˜’—ȱ
information is provided to help you get to the root of
Šȱ›Ž™˜›Žȱ™›˜‹•Ž–ǯ
CAUTION: High-Energy Electric Spark!
‘Žȱȱ’—’’˜—ȱœ¢œŽ–œȱ™›˜žŒŽȱŠȱ‘’‘ȬŽ—Ž›¢ȱŽ•ŽŒ›’Œȱ
œ™Š›”ǰȱ‹žȱ‘Žȱœ™Š›”ȱ–žœȱ‹Žȱ’œŒ‘Š›Žǰȱ˜›ȱŠ–ŠŽȱ˜ȱ‘Žȱ
œ¢œŽ–ȱŒŠ—ȱ›Žœž•ǯȱ˜ȱ—˜ȱŒ›Š—”ȱ˜›ȱ›ž—ȱŠ—ȱŽ—’—Žȱ ’‘ȱŠȱ
œ™Š›”ȱ™•žȱ•ŽŠȱ’œŒ˜——ŽŒŽǯȱ• Š¢œȱ™›˜Ÿ’ŽȱŠȱ™Š‘ȱ˜›ȱ‘Žȱ
œ™Š›”ȱ˜ȱ’œŒ‘Š›Žȱ˜ȱ›˜ž—ǯ
Ž™˜›Žȱ’—’’˜—ȱ™›˜‹•Ž–œȱŠ›Žȱ–˜œȱ˜ĞŽ—ȱžŽȱ˜ȱ
™˜˜›ȱŒ˜——ŽŒ’˜—œǯȱŽ˜›Žȱ‹Ž’——’—ȱ‘ŽȱŽœȱ™›˜ŒŽž›Žǰȱ
Œ‘ŽŒ”ȱŠ••ȱŽ¡Ž›—Š•ȱ ’›’—ǯȱŽȱŒŽ›Š’—ȱŠ••ȱ’—’’˜—Ȭ›Ž•ŠŽȱ
wires are connected, including the spark plug leads.
ŽȱŒŽ›Š’—ȱŠ••ȱŽ›–’—Š•ȱŒ˜——ŽŒ’˜—œȱęȱœ—ž•¢ǯȱŠ”Žȱ
sure the ignition switch is in the run position.
DZȱ ‘Žȱȱ’—’’˜—ȱœ¢œŽ–œȱŠ›ŽȱœŽ—œ’’ŸŽȱ˜ȱ
excessive load on the kill lead. If a customer
complains of hard starting, low power,
˜›ȱ–’œę›Žȱž—Ž›ȱ•˜Šǰȱ’ȱ–Š¢ȱ‹ŽȱžŽȱ˜ȱ
excessive draw on the kill circuit. Perform the
appropriate test procedure.
Test Procedure for Standard (Fixed Timing) CD
Ignition System
œ˜•ŠŽȱŠ—ȱŸŽ›’¢ȱ‘Žȱ›˜ž‹•Žȱ’œȱ ’‘’—ȱ‘ŽȱŽ—’—Žȱ
ignition system.
ȱ ŗǯȱ ˜ŒŠŽȱ‘Žȱ™•žȱŒ˜——ŽŒ˜›œȱ ‘Ž›Žȱ‘Žȱ ’›’—ȱ
harnesses from the engine and equipment are
“˜’—ŽǯȱŽ™Š›ŠŽȱ‘ŽȱŒ˜——ŽŒ˜›œȱŠ—ȱ›Ž–˜ŸŽȱ‘Žȱ
‘’Žȱ”’••ȱ•ŽŠȱ›˜–ȱ‘ŽȱŽ—’—ŽȱŒ˜——ŽŒ˜›ǯȱŽ“˜’—ȱ
the connectors and position or insulate the kill
lead terminal so it cannot touch ground. Try to
start the engine to verify whether the reported
™›˜‹•Ž–ȱ’œȱœ’••ȱ™›ŽœŽ—ǯ
DZȱ ȱ‘ŽȱŽ—’—ŽȱœŠ›œȱ˜›ȱ›ž—œȱž›’—ȱŠ—¢ȱ˜ȱ‘Žȱ
testing, you may need to ground the kill lead
to shut it down. Because you have interrupted
the kill circuit, it may not stop using the
switch.