Electronic Power Steering (Eps); Eps Operation; Proper Eps System Diagnosing; Eps Circuit - Polaris 2014 Sportsman 570 EF Service Manual

ELECTRICAL

ELECTRONIC POWER STEERING (EPS)

EPS Operation

The EPS module is an intelligent electronic power
steering system that operates off of the vehicle's 12V
electrical system. It calculates steering assist by sensing
the difference between the input torque of the steering
post and the output torque required to turn the wheels,
and then provides assist by energizing an electric motor.
The process provides a smooth, seamless assist.
The system is continuously running diagnostic checks
and monitoring factors such as battery voltage, ground
speed and engine speed. In the event an internal or
external issue that affects the EPS system is detected,
the system will illuminate a fault indicator and transition
to a normal mechanically coupled steering system. The
system is Polaris Digital Wrench® compatible for
simplified diagnostics
through the vehicle's diagnostic port.
With the engine off and the key on, the power steering
unit will operate for up to five minutes. After the five
minutes, you will need to cycle the key switch and restart
the engine to regain power steering operation.
The Power Steering 30A Fuse.
• If the fuse fails, the Power Steering Malfunction
Indicator Light (MIL) on the instrument cluster will
illuminate. During this time, the vehicle will have
no power steering operation. You will be able to
connect and communicate with the vehicle's
Engine Controller, but not the Power Steering
Controller, while using Digital Wrench®.
NOTE: DO NOT SPLICE OR CUT INTO THE
CAN CIRCUITS.
10.24
and system troubleshooting
9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
CAUTION
Electronic Power Steering (EPS) units are not
interchangeable between ATV and RANGER product
NOTE: Refer to Chapter 10 "Steering /
Suspension" for power steering unit removal
and installation
Removal, page 5.27
WIRE COLOR FUNCTION
Key-On / Run Switch On
ORANGE
Battery Voltage / EPS Power
Battery Voltage
RED
BROWN Ground
CAN High Signal
YELLOW
CAN Low Signal
GREEN

Proper EPS System Diagnosing

READ BEFORE YOU REPLACE THE EPS UNIT!
NOTE: Try to reflash the EPS unit before attempting
to replace it. A simple reflash may be all that is
needed to repair the EPS problem. Always reflash
the EPS unit as the first step in diagnosing an EPS
problem.

EPS Circuit

NOTE: Refer to "Cooling Fan & EPS" breakout
diagram near the end of this Chapter.
lines.
procedures. EPS Unit