Ecu Replacement; Etc Learn Procedure; Ecu Reprogramming (Reflash) - Polaris RZR XP 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®.

ETC LEARN PROCEDURE

IMPORTANT
This procedure MUST be performed on the vehicle
whenever the ECU is replaced or reflashed or the
throttle body is replaced.
1. After the reflash / ECU replacement / throttle body
change, leave the key on (engine not running) for 60
seconds. Do NOT crank the engine during this time.
2. Turn the key off and wait 3 minutes. During this time,
the ECU will write values into memory and then
completely shut down.
3. Turn key back on and start the vehicle. The vehicle
should operate normally.
4. If the procedure was interrupted at any time, start
back at step 1.

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.
NOTICE
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:
9929419 R02 - 2018-2019 RZR XP / XP 4 Turbo S Service Manual
© Copyright Polaris Industries Inc.
• 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 10.17.
• 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.
DIAGNOSTIC
10
10.21