Kohler Command Pro CV980 - Manual (Page 58)

7.8
Section 7
Electrical System and Components
ȱ Řǯȱ ›Š—”ȱ‘ŽȱŽ—’—Žȱ˜ŸŽ›ǰȱŽœŠ‹•’œ‘’—ȱŠȱ–’—’–ž–ȱ
˜ȱśśŖȬŜŖŖȱǰȱŠ—ȱ˜‹œŽ›ŸŽȱŽœŽ›ǻœǼȱ˜›ȱœ™Š›”ǯ
ȱ řǯȱ Ž™ŽŠȱ‘Žȱœ™Š›”ȱŽœȱ˜—ȱ‘Žȱ˜™™˜œ’ŽȱŒ¢•’—Ž›ȱ’ȱ
Œ¢•’—Ž›œȱŠ›Žȱ‹Ž’—ȱŽœŽȱ’—’Ÿ’žŠ••¢ǯ
Šǯȱ ȱ‹˜‘ȱŒ¢•’—Ž›œȱ‘ŠŸŽȱ˜˜ȱœ™Š›”ȱ‹žȱ‘Žȱ
engine runs poorly, or existing plug condition
˜›ȱŠ™™ŽŠ›Š—ŒŽȱ’œȱšžŽœ’˜—Š‹•Žǰȱ’—œŠ••ȱ—Ž ȱ
spark plugs gapped at 0.76 mm (0.030 in.),
Š—ȱ›ŽŽœȱŽ—’—Žȱ™Ž›˜›–Š—ŒŽǯȱȱ™›˜‹•Ž–ȱ
™Ž›œ’œœǰȱ˜ȱ˜ȱŽœȱřǯ
‹ǯȱ ȱ˜—ŽȱŒ¢•’—Ž›ȱ‘Šȱ˜˜ȱœ™Š›”ȱ‹žȱ‘Žȱ˜‘Ž›ȱ
Œ¢•’—Ž›ȱ‘Šȱ—˜ȱœ™Š›”ǰȱ˜›ȱ’—Ž›–’ĴŽ—ȱœ™Š›”ǰȱ
˜ȱ˜ȱŽœȱŚǯ
Œǯȱ ȱ‘Ž›Žȱ Šœȱœ™Š›”ȱ˜—ȱ‹˜‘ȱŒ¢•’—Ž›œȱ‹žȱ
™˜ Ž›ȱ’œȱœžœ™ŽŒǰȱ˜ȱ˜ȱŽœȱřǯ
Test 3. Check for Timing Advance
ȱ ŗǯȱ Š”ŽȱŠȱ•’—Žȱ—ŽŠ›ȱ‘ŽȱŽŽȱ˜ȱ‘ŽȱĚ¢ ‘ŽŽ•ȱœŒ›ŽŽ—ȱ
with a marking pen, chalk, or narrow tape. See
’ž›ŽȱŝȬŝǯ
ȱ Řǯȱ ˜——ŽŒȱŠ—ȱŠž˜–˜’ŸŽȱ’–’—ȱ•’‘ȱ˜ȱŒ¢•’—Ž›ȱ
that had good spark.
Figure 7-7. Mark For Timing Advance.
ȱ řǯȱ ž—ȱ‘ŽȱŽ—’—ŽȱŠȱ’•ŽȱŠ—ȱžœŽȱ‘Žȱ’–’—ȱ•’‘ȱ
‹ŽŠ–ȱ˜ȱ•˜ŒŠŽȱ‘Žȱ•’—Žȱ˜—ȱ‘ŽȱœŒ›ŽŽ—ǯȱ›Š ȱŠȱ•’—Žȱ
˜—ȱ‘Žȱ‹•˜ Ž›ȱ‘˜žœ’—ȱ—Ž¡ȱ˜ȱ‘Žȱ•’—Žȱ˜—ȱ‘Žȱ
œŒ›ŽŽ—ǯȱŒŒŽ•Ž›ŠŽȱ˜ȱž••ȱ‘›˜Ĵ•ŽȱŠ—ȱ ŠŒ‘ȱ˜›ȱ
movement of the line on the screen relative to the
•’—Žȱ˜—ȱ‘Žȱ‹•˜ Ž›ȱ‘˜žœ’—ǯȱȱ‹˜‘ȱŒ¢•’—Ž›œȱ‘Šȱ
good spark, repeat the test on the other cylinder.
ŽŽȱ’ž›ŽȱŝȬŞǯ
Flywheel Screen Mark
Figure 7-8. Check For Timing Advance.
a. If the line on the screen moved away from
‘Žȱ•’—Žȱ˜—ȱ‘Žȱ‹•˜ Ž›ȱ‘˜žœ’—ȱž›’—ȱ
ŠŒŒŽ•Ž›Š’˜—ǰȱ‘Žȱȱ’—’’˜—ȱ–˜ž•Žȱ
˜›ȱ‘ŽȱŒ¢•’—Ž›ȱ‹Ž’—ȱŽœŽȱ’œȱ ˜›”’—ȱ
™›˜™Ž›•¢ǯȱȱ’ȱ’—Ȃȱ–˜ŸŽȱŠ Š¢ǰȱ˜ȱ˜ȱŽœȱŚǯ
‹ǯȱ ȱ¢˜žȱ Ž›ŽȱŠ‹•Žȱ˜ȱŒ‘ŽŒ”ȱ’–’—ȱ˜—ȱ‹˜‘ȱ
Œ¢•’—Ž›œǰȱ‘Žȱ•’—Žœȱ¢˜žȱ–ŠŽȱ˜—ȱ‘Žȱ‹•˜ Ž›ȱ
‘˜žœ’—ȱœ‘˜ž•ȱ‹ŽȱşŖǚȱŠ™Š›ǯȱȱ—˜ǰȱ˜ȱ˜ȱŽœȱ
Śǯ
Test 4. Test the Ignition Modules and Connections
ȱ ŗǯȱ Ž–˜ŸŽȱ‘Žȱ‹•˜ Ž›ȱ‘˜žœ’—ȱ›˜–ȱ‘ŽȱŽ—’—Žǯȱ
—œ™ŽŒȱ‘Žȱ ’›’—ȱ˜›ȱŠ—¢ȱŠ–ŠŽǰȱŒžœǰȱ‹Šȱ
Œ›’–™œǰȱ•˜˜œŽȱŽ›–’—Š•œǰȱ˜›ȱ‹›˜”Ž—ȱ ’›Žœǯȱ‘ŽŒ”ȱ
that connections are oriented properly on
terminals of modules.
ȱ Řǯȱ ’œŒ˜——ŽŒȱ‘Žȱ•ŽŠœȱ›˜–ȱ‘Žȱ’—’’˜—ȱ–˜ž•ŽǻœǼȱ
Š—ȱŒ•ŽŠ—ȱŠ••ȱ˜ȱ‘ŽȱŽ›–’—Š•œȱǻ–Š•ŽȱŠ—ȱŽ–Š•ŽǼȱ
with aerosol electrical contact cleaner to remove
any old dielectric compound, dark residue, dirt,
˜›ȱŒ˜—Š–’—Š’˜—ǯȱ’œŒ˜——ŽŒȱ‘Žȱœ™Š›”ȱ™•žȱ
leads from the spark plugs.
ȱ řǯȱ œ’—ȱŠȱ–ž•’Ȭ–ŽŽ›ǰȱŒ‘ŽŒ”ȱ‘ŠȱŠȱ™›˜™Ž›ȱ›˜ž—ȱ
’œȱŽœŠ‹•’œ‘Žȱ‹Ž ŽŽ—ȱ‘Žȱ›˜ž—ȱǻ‹•ŠŒ”Ǽȱ•ŽŠȱ
˜ȱ‘Žȱȱ–˜ž•ŽȱǻŒ•˜œŽœȱ˜ȱœ™Š›”ȱ™•žȱ•ŽŠǼǰȱ
and a known good ground location on the
engine.
ȱ Śǯȱ ž›—ȱ‘Žȱ”Ž¢ȱœ ’Œ‘ȱ˜ȱ‘Žȱȱ™˜œ’’˜—ȱŠ—ȱ
Œ‘ŽŒ”ȱ˜›ȱŗŘȱŸ˜•œȱŠȱ‘ŽȱŒŽ—Ž›Ȧ™˜ Ž›ȱǻ›ŽǼȱ•ŽŠȱ
Ž›–’—Š•ȱ˜ȱ‘Žȱȱ–˜ž•ŽǯȱœŽȱ‘ŽȱœŠ–Žȱ
›˜ž—ȱ•˜ŒŠ’˜—ȱ˜›ȱ‘Žȱ–ž•’Ȭ–ŽŽ›ȱŠœȱ’—ȱŽ™ȱřǯ
Šǯȱȱ ȱŠ••ȱŽœœȱŠ›Žȱ
ȱŠ—ȱ–˜ž•Žȱ‘Šœȱ—˜ȱœ™Š›”ȱ
˜›ȱŠ’•œȱ˜ȱŠŸŠ—ŒŽǰȱ›Ž™•ŠŒŽȱ‘ŽȱŠěŽŒŽȱ
module.
‹ǯȱ ȱŠ—¢ȱ˜ȱ‘ŽȱŽœœȱŠ›Žȱ‹ŠDzȱŽŽ›–’—ŽȱŒŠžœŽȱ
Š—ȱę¡ȱŠœȱ›Žšž’›Žǰȱ‘Ž—ȱ›ŽŽœǯ