11.36
9926813 R04 - 2013-2016 RZR 570 Service Manual
© Copyright Polaris Industries Inc.
FAN CONTROL CIRCUIT OPERATION /
TESTING
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 Chapter 2 “Maintenance” for cooling system
information.
FAN CONTROL CIRCUIT BYPASS TEST
1. Disconnect harness from coolant temperature
sensor on the engine cylinder head (see Chapter 4 –
ECT Sensor Replacement, page ).
2. With the transmission in Park, start the engine. After
a few seconds, the fan should start running and the
“Check Engine” indicator should display on the
instrument cluster. This indicates all other
components are working properly.
3. If the fan does not run or runs slowly, check the fan
motor wiring, ground, motor condition and
mechanical relay for proper operation. 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
and connector terminals.
COOLANT TEMPERATURE SENSOR
The coolant temperature sensor can be tested using an
ohmmeter or voltmeter.
1. With the engine and temperature sensor at room
temperature (68°F = 20°C), disconnect the harness.
2. With the meter in the ohms mode, place the meter
leads onto the sensor contacts.
3. Use the table Temperature / Resistance table to
determine if the sensor needs to be replaced.
TEMPERATURE °F (°C)
RESISTANCE
68 °F (20 °C)
2.5 k Ω ± 6%
212 °F (100 °C)
186 ± Ω 2%
NOTE
If the coolant temperature sensor or circuit malfunctions
the radiator fan will default to 'ON'.
ELECTRICAL
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