10.39
ELECTRICAL
10
9924125 - 2013 RANGER RZR / RZR S / RZR 4 Service Manual
© Copyright 2012 Polaris Sales Inc.
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 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.
NOTE: See Chapter 5 “Body/Steering/Suspension”
for power steering unit removal and installation
procedures.
Proper EPS System Diagnosing
READ BEFORE YOU REPLACE THE EPS UNIT!
IMPORTANT: 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.
Electronic Power Steering (EPS) units are not
interchangeable between ATV and RANGER
product lines.
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
WIRE COLOR FUNCTION
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