Kohler Comand Pro CH1000, Service Manual

Page: 59 / 142

7.7
Section 7
Electrical System and Components
7
Troubleshooting DSAI Ignition Systems
The DSAI ignition system is designed to be trouble
free for the life of the engine. Other than periodically
checking/replacing the spark plugs, no maintenance,
timing, or module adjustments are necessary or
possible. Mechanical systems do occasionally
fail or break down however, so the following
troubleshooting information is provided to help you
get to the root of a problem.
Reported ignition problems are most o ft en due
to poor connections. Before beginning the test
procedure, check all external wiring. Be certain all
ignition-related wires are connected, including the
spark plug leads. Be certain all terminal connections
fi t snugly. Make sure the ignition switch is in the RUN
position.
Test Procedure for DSAI Ignition Systems
The following procedures are provided for
troubleshooting ignition problems on DSAI equipped
engines. They will allow you to isolate and pinpoint
the failed component(s).
Special Tools Required:
• Hand Tachometer
• Ignition Tester* (Kohler Part No. 25 455 01-S)
• Automotive Timing Light
• Multi-meter (Digital)
Specifi cations Required:
• Spark plug gap 0.76 mm (0.030 in.)
*NOTE: Ignition tester (Kohler Part No.
25 455 01-S), must be used to test ignition
on these engines. Use of any other tester can
result in inaccurate
fi ndings. The ba tt ery on
the unit must be fully charged and properly
connected before making any of these tests
(a ba
tt ery that is hooked up or charged
backward will crank the engine, but it won’t
have spark). Be certain the drive is in neutral
and all external loads are disconnected.
Figure 7-6. Digital Spark Advance Ignition (DSAI) System.
STARTER ASSEMBLY
STARTER
SOLENOID
TANG
STARTER
SOLENOID
STUD
BLUE
FUSE
RED
POS.
BATTERY
NEG.
SWITCH, KEY
STARTER
M-MAGNETO
R-RECTIFIER
BLUE WIRE
WHITE WIRES
CONNECTOR, 5-CIRCUIT
B-BATTERY
A-ACCESSORY
GROUND
YELLOW WIRES
BLACK WIRE
RED WIRE
CONNECTOR, 1-CIRCUIT
(ACCESSORY)
YELLOW
OIL SENTRY
LIGHT
RED
RED
CARB.
SOLENOID
RED
CARB.
BLACK
WHITE
RED
YELLOW (ACCESSORY) (+)
GREEN
(OIL SENTRY PULSE SIGNAL)
(NOT VALID WITH INDICATOR
LIGHT OR NO PRESSURE SWITCH)
WHITE
(ALTERNATIVE IGNITION
PULSE SIGNAL) (-)
VIOLET (B+ LEAD)
REGULATOR
RECTIFIER
REGULATOR
CONNECTOR
BLOCK
WHITE
(AC CHARGING
LEADS)
SPARK PLUG
#2 CYLINDER
(SPARK PLUG LEAD)
BLACK
(GROUD)
RED
(B+)
WHITE
(SHUT OFF)
MODULE LEAD
DESIGNATION
GROUND
MODULE
MTG SCREW
IGNITION
(MODULES)
FLYWHEEL
STATOR
ASS’Y
GROUND
CARB MOUNTING
STUD SPARK PLUG
#1 CYLINDER
GREEN
(NOT VALID WITH INDICATOR
LIGHT OR NO PRESSURE SWITCH)
OIL PRESSURE SWITCH
(OPTIONAL)
LIGHT ASSEMBLY, INDICATOR
(OPTIONAL)
BLACK
RED WIRES