ELECTRICAL
10.12
ELECTRONIC THROTTLE CONTROL (ETC) SWITCH
(COMPOSITE THROTTLE
HOUSIN G)
TheElectronicThrottleControl(ETC)systemisdesignedtostoptheengineofanATVintheeventofamechanical
problem with the throttle mechanism. The ETC switch is mounted independently of the throttle actuator lever
inside the throttleblock assembly. Thisis a normallyclosedswitch, and is held in the open position(contacts are
separated as shown in Illustration 1) by throttle cable tension. The contacts are “open” in normal operation
regardlessofthrottleleverposition. Intheevent ofamechanicalprobleminthethrottlemechanism(cabletension
is lost), the switch contacts close, connecting the CDI black wire to ground, preventing ignition spark. This is the
same as turning the key or engine stop switch “OFF”.
Test the ETC switch at the harness connector . NOTE: Adjust throttle cable freeplay (ETC switch) and make sure
throttle mechanism is functioning properly before testing the switch. Refer to Maintenance Chapter 2 for cable
adjustment procedure.
ETC OPERATION TEST
1. Remove throttle block cover by carefully
releasing all tabs around edge of cover.
2. Place transmission in neutral and apply parking
brake.
3. Start engine and open throttle lever slightly until
engine RPM is just above idle speed.
4. Hold throttle cable with fingers at point “A” as
shown below and release throttle lever. If the
ETC system is functioning properly, the engine
will lose spark and stop.
Switch contacts are open
during normal operation
A
ETC switch contacts are
closed in fault condition
(throttle cable slack).
Electronic Throttle Control (ETC) Switch
(Composite Throttle Housing)
Brn
Blk
Brn
Illustration 1
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