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Electronic Power Steering (Eps); Eps Operation; Proper Eps System Diagnosing - Polaris RZR XP 1000 Service Manual

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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
and
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.
NOTE: 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®.
NOTE: DO NOT SPLICE OR CUT INTO THE
CAN CIRCUITS.
9925724 R01 - 2014-2015 RZR XP 1000 / RZR XP4 1000 Service Manual
system
troubleshooting
© Copyright 2014 Polaris Industries Inc.
WARNING
Electronic Power Steering (EPS) units are not
interchangeable between ATV and RANGER product
lines.
NOTE: See Chapter 5 ELECTRONIC POWER
STEERING ASSEMBLY, page 8.9 for power
steering
unit
removal
procedures.
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

Proper EPS System Diagnosing

READ BEFORE YOU REPLACE THE EPS UNIT!
NOTE: 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 Wrench®.
ELECTRICAL
and
installation
11
11.41

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