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ELECTRONIC FUEL INJECTION
9923142 - 2011 RANGER RZR / RZR S / RZR 4 Service Manual
© Copyright 2010 Polaris Sales Inc.
Engine Controller Reprogramming (Reflash)
Process Overview
The reprogramming feature is in the Special Tests menu on the
Digital Wrench™ screen. Start Digital Wrench™ and click on
the Special Tests menu icon (red tool box). A technician should
be familiar with the process and with computer operation in
general before attempting to reprogram an ECU.
The Digital Wrench™ Engine Controller Reprogramming (or
“Reflash”) feature allows reprogramming of the ECU fuel and
ignition map. To successfully reprogram the ECU, an
Authorization Key must be obtained by entering a Request Code
in the box provided on the Reflash Authorization site. The
Request Code is automatically generated by Digital Wrench™
during the reprogramming process. The Reflash Authorization
site is located under the “Service and Warranty” drop down
menu on the dealer website at: www.polarisdealers.com.
IMPORTANT: Failure to follow the reprogramming
instructions completely and correctly can result in an
engine that does not run! Replacement ECUs are
programmed as “no-start” and require a reflash for
them to work.
Reprogramming (Reflash) Tips:
• BATTERY VOLTAGE: The majority of problems with
reprogramming can be attributed to a low battery. Be
sure the battery voltage (no load) is at least 13 volts and
at least 12.5 volts with the key ‘ON’. Connect a battery
charger if necessary to bring voltage level above
minimum. Fully charge the battery before you attempt
to reprogram.
• DEDICATED LAPTOP: Best results are obtained using
a laptop computer that is “dedicated to Digital
Wrench™”. A laptop that is used by a variety of people
and in several applications around the dealership is
more likely to cause a reprogramming problem than one
dedicated to Digital Wrench™ diagnostics only.
• OBTAINING THE LATEST UPDATE:
Reprogramming updates are provided periodically and
contain the most recent calibrations (see “Digital
Wrench™ Updates”).
• CLOSE NON-ESSENTIAL PROGRAMS: Polaris
recommends that you DO NOT install non-essential
programs on a Service Department laptop. Camera
detection software, Virus Scanners, Tool Bars, etc. may
clog up memory if running in the background and make
it harder for the diagnostic software to operate.
• KNOW THE PROCESS: If you are not familiar with
the entire reprogramming process, review the HELP
section of the diagnostic software before you attempt
reprogramming. Click on the ? on the tool bar or press
F11. The information in the on-line help is the most
current and complete information available. This
should be your first step until you are familiar with the
process.
• COMMUNICATION PROBLEMS: If you have had
problems communicating with a vehicle while
performing diagnostic functions, do not attempt
reprogramming until the cause has been identified and
fixed. Check all connections, and be sure battery
voltage is as specified.
Proceed to http://polaris.diagsys.com for specific
information and FAQs on how to troubleshoot
communication problems.
• DON’T DISTURB THE PC: While reprogramming is
in progress, don’t move the mouse and don’t touch the
keyboard. The process only takes a few minutes, and is
best left alone until complete.
Reprogramming (Reflash) Procedure:
If you are not familiar with the reprogramming process, review
the “Reprogramming (Reflash) Tips” before you begin. Follow
the on-screen instructions as you progress through the steps. If
you encounter a problem, always check the On-Line help for
current tips and information.
1. Verify the most current update has been downloaded and
loaded into Digital Wrench™. See “Digital Wrench™
Version and Update ID” on page 4.41.