Arctic Cat 2018 ZR 200, Service Manual

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35
Electrical System
TESTING COMPONENTS
Following are testing procedures for specific electrical
components. All tests of the electrical components
should be made using the digital Fluke Model 88 Multi-
meter. Replace any component that does not have a test
value within specifications.

NOTE: Whenever using a digital-style tester, “open
(infinite resistance)” denotes an overload and the
meter reading will be OL since the meter is not cali-
brated to register resistance values of that magnitude.

NOTE: Always check the appropriate fuse before
testing a component for failure.
Transistorized Ignition
System
The transistorized ignition system has no contact points.
Therefore, this ignition system does not require periodic
reconditioning of contact point surfaces or point gap
adjustment. As a result, a strong spark is produced even
at low speeds so maximum reliability can be ensured.
OPERATION
GEN-0008
When the recoil starter handle is pulled, the flywheel is
turned. An electromotive force generated in the primary
winding of the ignition coil makes the transistor (TR1)
conduct through the resistor (R) and forms the primary
circuit (indicated by dashed lines).
As the flywheel turns faster, the primary current
increases, and the terminal voltage of the circuit consist-
ing of the resistor (R) and the transistor (TR1) increases.
This increases the working voltage at the connection of
the series circuit (r1 + r2) connected in parallel to the pri-
mary circuit. As the flywheel turns further, the terminal
voltage of the resistor (r2) in the resistor circuit (r1 + r2)
rises to the level of working voltage of the transistor
(TR2) when the ignition timing approaches the rated
RPM, and, thus, the transistor (TR2) is turned on. As a
result, the base current of (TR1) flowing through the
resistor (R) is by-passed, and the transistor (TR1) is
turned off from the conductive state.
The current flowing through the primary winding (2) is
thus interrupted, and rapid change occurs in the magnetic
flux across the ignition coil. The result is a high surge
voltage in the secondary winding (3).
SPARK ADVANCE CHARACTERISTIC
As noted above, the unit circuit detects a voltage and
makes switching to produce a high voltage required to
produce a spark. On the other hand, the wave form of the
voltage generated in the primary winding changes as the
flywheel turns.
The working voltage (VS) of the unit circuit is at level A
when the engine is started, but as the engine speed
increases, the wave form of the voltage changes and
advances to level B.
GEN-0009
TROUBLESHOOTING
1. Remove the spark plug and visually check its condi-
tion. Replace if fouled. Adjust spark plug gap to
0.711-0.787 mm (0.028-0.031”). Attach the high ten-
sion lead to the spark plug and ground the plug on
the cylinder head.

NOTE: Make sure the emergency stop switch is in
the ON (UP) position, the ignition switch is in the
RUN position.
2. Crank the engine over and check for a spark. If no
spark is present, disconnect the main wiring harness
from the engine. Crank the engine over. If spark is
now present, the problem is either one or more of the
following items:
A. Throttle cable adjustment
B. Defective RPS/idle switch
C. Defective ignition switch
D. Defective emergency stop switch
E. Defective wiring harness
F. Defective tether (if applicable)
Testing Ignition Switches
1. Disconnect the engine wires from the main wiring
harness.