Polaris TRAIL BOSS 325 2001 Manual page 296

ELECTRICAL
ELECTRONIC THROTTLE CONTROL (ETC) SWITCH
The Electronic Throttle Control (ETC) system is designed to stop the engine of an ATV in the event of a mechanical
problem with the throttle mechanism. The ETC switch is mounted independently of the throttle actuator lever
inside the throttle block assembly. This is a normally closed switch, and is held in the open position (contacts are
separated as shown below) by throttle cable tension. The contacts are "open" in normal operation regardless of
throttle lever position. In the event of a mechanical problem in the throttle mechanism (cable tension 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
Remove throttle block cover by carefully releasing all tabs around edge of cover.
Place transmission in neutral and apply parking brake.
Start engine and open throttle lever slightly until engine RPM is just above idle speed.
Hold throttle cable with fingers at point "A" as shown below and release throttle lever. If the ETC system is func-
tioning properly, the engine will lose spark and stop.
Electronic Throttle Control (ETC) Switch
(Composite Throttle Housing)
10.32
ETC switch contacts are
closed in fault condition
(throttle cable slack).
Switch contacts are open
during normal operation
A
Blk
Brn Brn