Polaris SPORTSMAN 400 2003, Service Manual, Page: 251 / 274

ELECTRICAL
10.12
5. If the fan motor draws more than 6.5 Amps,
replace the motor.
Fan Motor Current Draw:
Should Be Less Than 6.5 Amps
FAN CONTROL SWITCH
OPERATION TEST
1. Place switch in a water bath and submerse it to
the base of the threads. Do not allow threads to
contact container or inaccurate reading will result.
2. Heat the coolant slowly and monitor the
temperature with a thermometer or Fluke
t
meter
pyrometer. The switch should be closed
(conductive) at the “ON” temperature indicated in
the chart, and stay conductive until the “OFF”
temperature is reached.
REFER TO PARTS MANUAL FOR FAN
SWITCH APPLICATION
Fan Switch
Part Number
Continuity
(On)
No Continuity
(Off)
4010161 180 F (82 C)
3 F
149 F (65 C)
8 F
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” during 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, which prevents 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
functioning properly, the engine will lose spark and
stop.
Switch contacts are
open during normal op-
eration
A
ETC switch contacts
are
closed in a fault
condition (throttle cable
slack).
Electronic Throttle Control (ETC) Switch
(Composite Throttle Housing)
Brn
Blk
Brn
CDI UNIT
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