Polaris Sportsman 400, Service Manual

Page: 342 / 381

ELECTRICAL
10.8
IGNITION SYSTEM
Whenever troubleshooting an electrical problem you should first check all terminal connections to be sure they
are clean and tight. Also be sure that colors match when wires are connected. Use the following pages as a guide
for troubleshooting. The resistance values are also given on the specification pages.
Condition: No Spark or intermittent spark
Disconnect the black wire at the CDI module
to isolate the ignition from the kill system.
Does it have spark?
-Test the ignition switch, engine stop
switch, and speed limiter circuit for
shorts to ground.
-Check connectors for moisture,
wire color matching or corrosion.
Disconnect the exciter coil and pulse coil connec-
tor from the CDI module. Measure the resistance
of the exciter coil and pulse coil (where applica-
ble). Refer to the exploded view on page 10.7 or
the wiring schematic for meter connections and
specifications. Compare results to the specifica-
tions on the exploded views. Are all within speci-
fications?
Inspect connectors, wiring and
grounds to the component in
question. Replace the compo-
nent if a wiring problem cannot
be found.
Yes
No
Yes
Yes
No
Check coil ground connection between engine and coil
mount using an ohmmeter. The coil mount should
have good continuity to ground on the engine (0-.2
Ω)
.
Replace Spark Plug
Disconnect and check the secondary coil. Resis-
tance values should be:
Primary Side - Primary Wire Tab to Ground
(on coil mount or engine): .3 to .5 Ohms
Secondary Side High Tension Wire to engine
ground- Cap installed - 11,300
Ω
Cap removed - 6300
Ω
Are these values within specs?
Replace the ignition coil.
No
Yes
If all of the above tests are within specifications, and all grounds, connections, and wire color coding
have been inspected, perform voltage output tests on following page or replace the CDI module.
Clean coil mounting area.
Repair ground wire connections.
No