Ecu Replacement; Ecu Reprogramming (Reflash) - Polaris RANGER 500 2018 Service Manual

ECU REPLACEMENT

Although the need for ECU replacement is unlikely, a specific replacement procedure is required to ensure that all
essential data contained within the original ECU is transferred to the replacement ECU.
Refer to procedure and carefully follow all instructions provided in Digital Wrench®.

ECU 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.
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 Chapter 4 – Digital Wrench® Updates, page 4.44.
• 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.
9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
© Copyright Polaris Industries Inc.
Perform specialized testing
and adjustment functions
service reports.
Open the ASSERT ASK
form.
NOTE
FUEL SYSTEM
Run the Help System.
Prints the current screen as
a formatted printout.
4.49
4