10.22
9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
COOLING SYSTEM COMPONENTS
Fan Control Circuit Operation
Power is supplied to the fan via the Orange/Black wire
when the relay is ON. The ground path for the fan motor
is through the Brown harness wire. Refer to “RELAYS”
later in this chapter for more information on fan functions.
CAUTION
Keep hands away from fan blades during operation.
Serious personal injury could result.
NOTE: The fan may not function or operation may
be delayed if coolant level is low or if air is trapped in
the cooling system. Be sure cooling system is full
and purged of air. Refer to Maintenance Chapter 2
for cooling system information.
Fan Control Bypass Test
1.
Disconnect
harness
from
coolant
temperature
sensor on engine.
2.
With the ATV in “Park” and with the parking brake on,
turn the ignition key and engine stop switch “ON”.
Start the engine. The fan should start running.
3.
If the fan does not run or runs slowly, check the fan
motor wiring, ground, motor condition for proper
operation (refer to “FAN MOTOR CURRENT DRAW”
in this section). Repair or replace as necessary. If the
fan runs with the sensor harness disconnected, but
will not turn on when the engine is hot, check the
coolant
temperature
sensor,
wires,
grounds,
connector terminals.
Fan Motor Current Draw Test
A current draw test will provide a good indication of fan
motor condition. A worn or damaged fan motor will draw
more current, which causes a reduction in blade speed
and reduced cooling.
1.
Disconnect the harness from the coolant sensor.
2.
Connect a DC ammeter in-line on the fan switch
harness wires. See illustration
(An inductive ammeter
is required)
.
3.
Be sure fan blade is free to rotate.
4.
Turn ignition key and engine stop switch to “ON”
position. Read the current draw on ammeter with fan
running.
5.
( Direct 12 Vdc to fan required)
6.
If the fan motor draws more than 10 Amps, replace
the motor.
d
Fan Motor Current Draw:
Should Be Less Than 10 Amps
NOTE:
Fan motor current draw specification
may vary.
ELECTRICAL
