Kohler command cv17 Service Manual page 44

Electrical System
Condition
Strong, steady spark is now present
on both sides.
Still a spark problem.
Test SAM
1. Trace red power source lead from SAM to harness connection. Separate connector and connect red lead of a DC
voltmeter to harness terminal. Trace ground lead from SAM (black on singles, green on twins) to grounding screw.
Connect black voltmeter lead to eyelet terminal of ground lead or ground screw/bolt. Check voltage with key
switch in both START and RUN positions. A minimum of 7.25 volts must be present.
a. If correct voltage is not measured, connect black voltmeter lead directly to negative (–) post of battery and test
voltage again in both key positions. If correct voltage is now indicated, check ground circuit connections. If
ground screw/bolt or any other fasteners in ground circuit are black (oxide-coated), replace them with zinc
plated (silver colored) fasteners.
b. If correct voltage is still not indicated, check harness connector terminal for a good connection and crimp to
lead. Then trace power source circuit back through harness, key switch, etc., looking for any poor connections,
or faulty circuits.
Condition
Incorrect voltage is measured.
Correct voltage is measured.
2. Disconnect all SAM leads, isolating it from engine. Test SAM according to style with tester 25 761 21-S (tests
ASAM style modules only), or tester 25 761 40-S (tests both ASAM and DSAM style modules). Use test
instructions following, or those provided with tester. If SAM tests bad, replace it.
3. Reattach SAM leads, verifying a snug fit at ignition module terminals. If any connections do not feel snug,
disconnect lead, lightly pinch female terminal with a pliers, and recheck fit.
4. Seal base of ignition module connections with GE/Novaguard G661 or equivalent dielectric compound. Beads
should overlap between two connections to form a solid bridge of compound. Do not put any compound inside
connectors.
24 584 15-S ignition modules have a separator/barrier between terminals. On these modules, seal base of
terminal if any portion of it is exposed, but it is not necessary to have overlapping beads of sealant between
connections.
5. Test for spark to be sure system is working, before you reinstall blower housing. If there is still a spark problem on
one side, replace that ignition module and recheck spark.
Test ASAM and DSAM
Allow 15-20 seconds for tester to clear and reset itself between tests or if test is interrupted before completion of test
cycle. Otherwise, a false reading may be displayed in form of a (–) or a faint 8.
Tester is powered by a 9-volt battery. Most SAMs are designed to operate down to a minimum of 7.25 volts. If tester
battery drops below that level, incorrect test readings will result. Tester battery should be checked periodically by
connecting a DC voltmeter between red and green lead wires, with tester connected to a SAM. Press and hold test
button for a full test cycle (F or P appears and then display shuts off), while monitoring voltage reading on voltmeter.
If voltage drops below 7.5 at any time during cycle, 9-volt tester battery must be replaced. Use an extended life
(alkaline) battery.
To replace battery, remove outer set of screws on faceplate and carefully lift panel from body. Unplug connector and
pull battery (with mounting tape) off back of tester. Attach connector to new battery and mount battery to case with
double-backed tape. Reinstall faceplate and secure with four screws.
44
Possible Cause
SAM
SAM
Possible Cause
Voltage
Voltage
KohlerEngines.com
Conclusion
Problem should be corrected. Go to
Test SAM step 4.
Test SAM.
Conclusion
Connect black voltmeter lead directly
to negative (–) post of battery and test
voltage again in both key positions.
If correct voltage is still not indicated,
check harness connector terminal for
a good connection and crimp to lead.
Then trace power source circuit back
through harness, key switch, etc.,
looking for any poor connections, or
faulty circuits.
Check ground circuit connections.
If ground screw/bolt or any other
fasteners in ground circuit are black
(oxide-coated), replace them with zinc
plated (silver colored) fasteners.
24 690 07 Rev. H