Kohler COMMAND CH18, Service Manual

Page: 136 / 232

8.12
Section 8
Electrical System and Components
Figure 8-12. Figure 8-13.
**The tester is powered by a 9-volt battery. Most
SAMs are designed to operate down to a minimum
of 7.25 volts. If the tester battery drops below that
level, incorrect test readings will result. The tester
battery should be checked periodically by
connecting a DC voltmeter between the red and
green lead wires, with the tester connected to a
SAM. Press and hold the test button for a full test
cycle (‘‘F’’ or “P’’ appears and then display shuts
off), while monitoring the voltage reading on the
voltmeter. If the voltage drops below 7.5 at any time
during the cycle, the 9-volt tester battery must be
replaced. Use an extended life (alkaline) battery.
To replace the battery, remove the outer set of screws
on the faceplate and carefully lift the panel from the
body. Unplug the connector and pull battery (with
mounting tape) off the back of the tester. Attach the
connector to the new battery and mount the battery
to the case with double-backed tape. Reinstall the
faceplate and secure with the four screws.
To Test – Using 25 761 40-S Tester
DSAM/ASAM Test Procedure
NOTE: The SAM must be at room temperature when
tested. Disconnect all of the SAM leads,
isolating it from the main wiring harness
and the ignition module(s). Testing may be
performed with the module mounted or
loose. The figures show the part removed
from the engine for clarity. See Figure 8-14.
2. Check the SAM part number stamped on the side
of the housing. Verify that you have an analog
SAM (ASAM) Part No. 24 584 10 or lower, not a
digital SAM (DSAM) Part No. 24 584 18 and
higher. Follow sub-step a for testing an ASAM
with this tester. Digital SAM (DSAM) modules
require Tester 25 761 40-S for proper testing.
a. Depress the tester button and hold it down.
After approximately four seconds, a
numerical sequence should be displayed,
beginning with 1 or 2 and continuing to 8 or
9, followed by a letter “P” (pass) or “F” (fail).
See Figures 8-11 and 8-12.
DO NOT release
the tester button until the test cycle
completes and the display goes off*. If you get
a “-” sign instead of the numerical sequence,
and/or an “F” at the end of the cycle, the SAM
is probably bad. Recheck all of the
connections, check the condition of the tester
battery** and repeat the test. If you get the “-”
sign and/or “F” again in the retest, replace
that SAM.
*IMPORTANT!
Allow 15-20 seconds for the 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 the form of a “-” or a faint “8”.
3. Disconnect the yellow and brown tester leads
from the long module leads. Connect the brown
tester lead to the short brown module lead.
Connect the yellow tester lead to the short yellow
(or pink) module lead. See Figure 8-13. Leave the
red and green leads connected. Repeat step 2.