Polaris Sportsman 400, Service Manual

Page: 371 / 381

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
ELECTRICAL
10.37
ELECTRONIC THROTTLE CONTROL (ETC) SWITCH
The Electronic Throttle Control (ETC) system is designed to 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.