Electronic Power Steering; Eps Operation; Eps Torque Offset Procedure; Proper Eps System Diagnosing - Polaris RZR 570 2013 Service Manual

ELECTRONIC POWER STEERING

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 and system troubleshooting 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.
WARNING
Electronic Power Steering (EPS) units are not
interchangeable between ATV and RANGER product
lines.
Wire Color Functions
WIRE COLOR FUNCTION
ORANGE (2-Pin) Main Power (30A Protected)
BROWN (2-Pin)
Ground
ORANGE (8-Pin) Key-On Battery Voltage
YELLOW (8-Pin) CAN High Signal
GREEN (8-Pin) CAN Low Signal
9926813 R04 - 2013-2016 RZR 570 Service Manual
© Copyright Polaris Industries Inc.

EPS TORQUE OFFSET PROCEDURE

If the steering wheel pulls to one side when the vehicle is
driven in a straight line and there is no damage to the
steering or suspension components, perform the
procedure below to center the EPS steering angle sensor
(SAS) electronically.
1. On a flat surface, drive a short distance in a straight
line and stop the vehicle without touching the steering
wheel. Put the vehicle in park/lock the parking brake.
2. Connect the vehicle to Digital Wrench.
3. Click on the Special Tests menu (Red Toolbox) and
select Steering Angle Sensor Calibration.
4. Click on Set SAS Zero.
NOTE
The SAS Position should = 0.0 after clicking Set SAS
Zero.
5. Click the Complete button to program this setting into
the ECU.

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.
ELECTRICAL
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