All Wheel Drive (Awd) Coil; Operation Overview; Diagnosing System Failures; Cooling System Components - Polaris A12MH46AX Service Manual

ALL WHEEL DRIVE (AWD) COIL

Operation Overview

• Switch must be set to '4x4' or '4x4/ADC'. 12Vdc
power is present at the AWD hub coil.
• The instrument cluster senses grounding at pin
#16. AWD icon should turn on at the instrument
cluster.
• System must be grounded to operate.

Diagnosing System Failures

• Verify the AWD switch is functional.
• Verify the AWD hub coil is functional. Test the
AWD hub coil using an ohm meter.
EFI Shown
AWD Hub Coil Resistance:

24
• Verify the wiring harness, wiring, connectors,
connector pins and grounds are undamaged,
clean and connect properly.
• Verify continuity of wire connections with a known
good volt/ohm meter.
IMPORTANT: Verify all wires and wiring connections
have been tested properly with a known good volt/
ohm meter before suspecting a component failure.
80% of all electrical issues are caused by bad/failed
connections and grounds.
± 5%
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 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 - EFI

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
connector terminals.

Fan Control Bypass Test - H.O.

1. Disconnect harness from the fan switch on engine.
2. Apply 12 Vdc current and ground directly to the fan
harness terminals. Refer to the wire schematic.
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 direct 12Vdc applied (harness
disconnected), but will not turn on when the engine is
hot, check the fan switch, fan relay, wires, grounds
and connector terminals.
ELECTRICAL
sensor, wires, grounds,
10.17
10