ELECTRICAL
5.20
ELECTRONIC THROTTLE CONTROL (ETC)
The Electronic Throttle Control (ETC) system is designed to limit the engine RPM of an ATV in the event of a
mechanical problem with the throttle mechanism. The ETC switch is mounted independently of the throttle actua-
tor lever inside the throttle block assembly. This is a normally closed switch, and is held in the open position (micro
switch button depressed) by throttle cable tension. The switch is “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 (switch pin is released) delivering battery voltage to the Speed Limiter module via the white wire.
Battery voltage on the white wire will cause the ignition system to misfire at the “ETC Limit”.
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 adjust-
ment procedure. Terminal board models - Disconnect White wire on terminal board that leads from the ETC switch.
Turn ignition key (and engine stop switch) “On”. If voltage is present on the White wire and throttle cable is adjusted
properly, replace the ETC switch.
ETC Operation Test
Remove throttle block cover.
Place transmission in neutral and apply parking brake.
Start engine and open throttle lever slightly until engine RPM
is above the “ETC Limit” (see page 10.37 for LR module
ETC limits.
Hold throttle cable with fingers at point “A” as shown at
right and release throttle lever. If the ETC system is functioning properly engine RPM will be limited to the speci-
fied “ETC Limit” RPM.
R/W W
Normal
Fault
FF
Electronic Throttle Control (ETC) Switch
ETC Micro Switch
Button
A
(Cast Aluminum Throttle
Housing)
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