Kohler Command PRO CH260 [42/100] Electrical system
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Kohler Command PRO CH260 [42/100] Electrical system

Kohler Command PRO CH440 [42/100] Electrical system
42
Electrical System
KohlerEngines.com 17 690 01 Rev. J
Electronic Ignition Systems and Oil Sentry
™
Tests
1. Disconnect cap from spark plug and attach it to
terminal end of spark tester. Attach tester spring clip
to a good ground, not to spark plug. Turn ignition/key
switch ON and crank engine while observing fi ring
tip of tester.
Condition Conclusion
Tester is fi ring. Ignition system is good.
Install a new spark plug
and try to start engine. If it
still will not start, check
other possible causes
(fuel, compression, etc.).
Tester doesn't fi re. Go to step 2.
2. On electric start engines, remove starter cover
panel. Locate black/white kill lead coming from
ignition module inside blower housing. Disconnect
bullet connector where kill lead plugs into harness.
Repeat spark test (step 1).
Condition Conclusion
Spark is now present. Check for a shorted lead
in kill circuit or a faulty
switch (step 7).
Still no spark. Go to step 3.
3. Disconnect bullet connector where Oil Sentry
™
control module joins lead from Oil Sentry
™
fl oat
switch (yellow leads). Repeat spark test again.
Condition Conclusion
Spark is now present. Control module or fl oat
switch is faulty. Test
control module (step 4) and
fl oat switch (step 5). If there
is still no spark, test
ignition module (step 6).
4. Set an ohmmeter to Rx1 scale and zero meter.
Connect black ohmmeter lead to yellow Oil Sentry
™
control module lead and touch red ohmmeter lead to
black wire.
Condition Conclusion
Continuity should be
indicated.
Replace Oil Sentry
™
control module for any
other results.
5. Set an ohmmeter to Rx1 scale and zero meter.
Connect one ohmmeter lead to Oil Sentry
™
fl oat
switch lead (yellow with green sleeve) and touch
other lead to a bare spot on crankcase (ground).
Drain oil from crankcase and repeat test.
With oil at proper level, no continuity should have
been indicated. After oil was drained, continuity
should have been indicated.
Condition Conclusion
No continuity indicated. Remove closure plate
from engine and remove
fl oat switch for further
testing (steps 5a and 5b).
a. If continuity was indicated with and without oil
above, check if insulation has been scraped off
fl oat switch lead.
Condition Conclusion
Lead wire is bare. Allowing it to short, repair
with electrical tape or
replace fl oat switch.
b. With fl oat switch removed, connect one
ohmmeter lead to fl oat switch lead terminal and
connect other lead to mounting bracket. Test
resistance with switch in normal position and
inverted. Repeat test 2 or 3 times in each
direction.
Condition Conclusion
Switch continuity should
be as indicated.
If not, replace it.
6. Set an ohmmeter to Rx1K or Rx10K scale and zero.
Connect one ohmmeter lead to kill lead (black/white)
terminal and connect other lead into spark plug cap.
a. Remove cap from spark plug lead and test
resistance of cap alone.
b. If resistances are other than specifi ed, remove
blower housing and remove ignition module. With
kill lead and spark plug cap removed, test
resistance from small spade terminal to core of
spark plug lead wire. If resistance is not in this
range, replace module.
Resistance Chart
Ignition Module 13.5-18.0 K ohms
Cap 4-6 K ohms
Spade Terminal to Spark
Plug Lead Wire
9.5-12.9 K ohms

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