Electronic Power Steering (Eps); Eps Operation; Proper Eps System Diagnosing; Eps Torque Offset Procedure - Polaris RANGER XP 900 2018-2019 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.
NOTICE
To conserve battery power, the EPS unit will shut down
5 minutes after the engine has stopped if the key
remains in the ON position. At this point, the EPS
Malfunction Indicator Light will illuminate to indicate the
EPS has shut down and will set a fault code in Digital
Wrench®.
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®.
NOTICE
DO NOT SPLICE OR CUT INTO THE CAN CIRCUITS.
IMPORTANT
Electronic Power Steering (EPS) units are not
interchangeable between ATV and RANGER product
NOTICE
Refer to "Steering Assembly Service"page 8.4
section for power steering unit removal and installation
procedures.
11.50
and system troubleshooting
lines.
WIRE COLOR
ORANGE (2-Pin)
BROWN (2-Pin)
ORANGE (8-Pin)
YELLOW (8-Pin)
GREEN (8-Pin)

PROPER EPS SYSTEM DIAGNOSING

READ BEFORE YOU REPLACE THE EPS UNIT!
Verify the EPS unit has the latest software version and
calibration loaded before replacing the EPS unit. If not,
update to the latest version for each and follow the
guided diagnostic procedure(s) available in Digital

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.
The SAS Position should = 0.0 after clicking Set SAS
5. Click the Complete button to program this setting into
the ECU.
9929399 R01 - 2018-2019 RANGER XP/ CREW 900/1000 Service Manual
FUNCTION
Main Power (30A Protected)
Ground
Key-On Battery Voltage
CAN High Signal
CAN Low Signal
NOTICE
Wrench®.
NOTICE
Zero.
© Copyright Polaris Industries Inc.