Cdi Unit (350); Regulator/Rectifier; Lights - Arctic Cat 350 2011 Service Manual

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CDI Unit (350)

The CDI is located on the electrical tray in front of the
steering post.
 NOTE: The CDI unit is not a serviceable component.
If the unit is defective, it must be replaced.
The CDI is rarely the cause for electrical problems; how-
ever, if the CDI is suspected, substitute another CDI unit
to verify the suspected one is defective.
 NOTE: Prior to replacing the CDI unit to assure the
CDI unit is defective, it is advisable to perform a CDI
peak voltage test (see Ignition Coil in this section)
and/or perform a continuity test of the wiring harness
from the CDI connector to the CDI unit.
Electronic Control Unit
(ECU) (425)
The electronic control unit (ECU) is located above the
radiator under the radiator/electrical access panel.
 NOTE: The ECU is not a serviceable component. If
the unit is defective, it must be replaced.
The ECU is rarely the cause for electrical problems; how-
ever, if the ECU is suspected, substitute another ECU of
the same part number to verify the suspected one is
defective.
Diagnostic Trouble Codes (DTC) can be cleared by fol-
lowing the procedures located in the Diagnostic Trouble
Codes (DTC) sub-section in this section.

Regulator/Rectifier

The regulator/rectifier is located under the front rack and
front fenders above the oil cooler.
TESTING
1. Start engine and warm up to normal operating tempera-
tures; then connect a multimeter to the battery as follows.
2. Select the DC Voltage position; then connect the red
tester lead to the positive battery post and the black
tester lead to the negative battery post.
3. Start the engine and slowly increase RPM. The volt-
age should increase with the engine RPM to a maxi-
mum of 15.5 DC volts.
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 NOTE: If voltage rises above 15.5 DC volts, the regula-
tor is faulty or a battery connection is loose or corroded.
Clean and tighten battery connections or replace the
regulator/rectifier. If voltage does not rise, check Voltage
(Charging Coil - No Load) in this section. If charging coil
voltage is normal, replace the regulator/rectifier.

Lights

HEADLIGHTS - RUNNING LIGHTS
The connectors are the two 4-pin ones snapped onto the
front body/rack support. To release the connectors from
the frame, press the release tab with a small screwdriver.
Voltage (Headlights)
 NOTE: Perform this test on the main harness side of
the connectors. Also, the ignition switch must be in
the LIGHTS position.
1. Set the meter selector to the DC Voltage position.
2. Connect the black tester lead to the black wire; then
connect the red tester lead to the white wire.
3. With the dimmer switch in the LO position, the
meter must show battery voltage.
4. Remove the red tester lead from the white wire and
connect to the lavender wire.
5. With the dimmer switch in the HI position, the meter
must show battery voltage.
Section
Table of Contents
KC224
KC223