Remote Engine Start Systems Troubleshooting Guide – Subaru “Key Start” Ignition

NHTSA ID Number: 10208510

Manufacturer Communication Number: Remote Engine St

Summary

Remote engine start system troubleshooting guide.

 


GENUINE ACCESSORIES

Remote Engine Start Systems Troubleshooting Guide

Applicable to 2017MY+ Impreza,

2018MY+ Crosstrek,

2019MY+ Ascent,

2019MY+ Forester,

2020MY+ Legacy/Outback and 2022MY+ WRXeBay logo

with “Key Start” Ignition

 

  • Test and diagnose any vehicle diagnostic trouble codes (DTC) prior to proceeding with any Remote Engine Start (RES) part replacements.
  • Ensure the vehicle has a fully-charged battery before proceeding, approximately 12.63 volts.
  • Ensure that all RES harness connectors are securely seated per the respective installation instructions.
  • Ensure the vehicle has a sufficient amount of fuel.
  • This guide references back to the respective system’s installation instructions, please have a copy of the installation instructions on hand during troubleshooting.

“This Troubleshooting Guide is intended for use by professional technicians ONLY. It is written to inform those technicians of conditions that may occur in some vehicles, or to provide information that could assist in the proper servicing of the vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do the job correctly and safely. If a condition is described in this guide, DO NOT assume that your vehicle will have that condition.

 


Table of Contents

Service Part Matrix and Graphic Detail – 1 7 -18MY Impreza/18MY Crosstrek – 3
Service Part Matrix and Graphic Detail – 19MY + Impreza/Crosstrek – 4
Service Part Matrix and Graphic Detail – 19MY + Ascent – 5
Service Part Matrix and Graphic Detail – 19MY + Forester – 6
Service Part Matrix and Graphic Detail – 20MY + Legacy /Outback – 7
Service Part Matrix and Graphic Detail – 22MY + WRXeBay logo – 8
System Layout – 1 7 -18MY Impreza / 18MY Crosstrek – 9
System Layout – 19MY + Impreza / 19MY + Crosstrek – 11
System Layout – 19MY + Ascent, 19MY + Forester – 13
System Layout – 20MY + Legacy / 20MY + Outback – 15
System Layout – 22MY + WRXeBay logo – 1 7
Remote Engine Start Control Module Registration Procedure – SSM IV (DST-i)
17MY+ Impreza, 18MY+ Crosstrek, 19MY+ Ascent and 19-21MY Forester – 19
Remote Engine Start Control Module Registration Procedure – SSM IV (DST-i)
20MY + Legacy/ Outback, 22MY + Forester, 22MY + WRXeBay logo – 20
Remote Engine Start Bi-directional Transmitter Programming Procedure – 22
Remote Engine Start Run Time Selection – 22
Remote Engine Start Activation Horn Honk Diagnostics – 23
Remote Engine Start Diagnostic Mode – 24
Advanced Troubleshooting – 25
“The RES system will not run for the full default 15-minute run time” – 25
“The RES system will not operate when activated multiple times in a row” – 25
“The RES system shuts down when any vehicle door, trunk or rear gate is opened” – 26
“The vehicle starts by itself without pressing the RES transmitter button – 26
“The SSM IV (DST-i) screen displays “Registration Failure” when attempting to register
the RES control module to the vehicle” – 27
“CAN Diagnostic Trouble Codes ( “U codes” ) are triggered in the vehicle” – 28
“The vehicle’ s ignition turns ON when the RES system is activated,
but it does not crank the starter” – 29
“The RES system does not turn ON the vehicle ‘ s ignition circuits
after receiving the remote start command” – 30
“The vehicle starts when the RES system is activated,
but the heater / air conditioning does not turn ON” – 31
“The RES system does not respond when the RES transmitter button is pressed 2-times” – 32
“The RES system bi-directional feature does not function” – 33
“The vehicle’ s ignition turns ON and the horn honks two (2) times
when activating the RES system” – 34
Advanced Troubleshooting Video Links – 35

 


7 Affected Products

Vehicles

MAKEMODELYEAR
SUBARUeBay logoASCENT2019
SUBARUeBay logoCROSSTREK2018
SUBARUeBay logoFORESTER2019
SUBARUeBay logoIMPREZA2017
SUBARUeBay logoLEGACY2020
SUBARUeBay logoOUTBACK2020
SUBARUeBay logoWRXeBay logo2022

 


1 Associated Document

Manufacturer Communications

TSG 900MHz KS
Rev. 02/1/22

https://www.nhtsa.gov/recalls?nhtsaId=10208510

MC-10208510-0001.pdf 5981.91KB

 


 

Bestseller No. 1
Start-X Remote Starter Kit for Subaru Legacy and Outback (2010, 2011, 2012, 2013, 2014) Vehicles | Key Ignition | Plug & Play Install | Lock 3X to Remote Start | Zero Wire Splicing
  • 𝗗𝗜𝗬 𝗿𝗲𝗺𝗼𝘁𝗲 𝘀𝘁𝗮𝗿𝘁 𝗸𝗶𝘁: Add remote start functionality to your vehicle for a fraction of the cost. Enjoy a comfortable driving experience from the start by pre-heating and defrosting your windshield in the winter or cooling down your vehicle before entering in the summer.
  • 𝗩𝗲𝗵𝗶𝗰𝗹𝗲 𝗰𝗼𝗺𝗽𝗮𝘁𝗶𝗯𝗶𝗹𝗶𝘁𝘆: SubarueBay logo Legacy and Outback (2010, 2011, 2012, 2013, 2014) models with key ignition.
  • 𝗩𝗲𝗵𝗶𝗰𝗹𝗲 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁𝘀: This kit is designed for key blade ignition vehicles only. Not compatible with push-to-start vehicles. Gas and automatic transmission only. Factory remote required. Some vehicle disassembly may be required; see installation guide for details. As a safety precaution, vehicle will shut down when door is opened; vehicle must be restarted before driving.
  • 𝗨𝘀𝗲 𝘆𝗼𝘂𝗿 𝗳𝗮𝗰𝘁𝗼𝗿𝘆 𝗿𝗲𝗺𝗼𝘁𝗲: Start your vehicle by pressing lock 3X on your existing OEM key fob. Press lock 3X again to turn off vehicle. Factory remote required – no remote is included in this kit. The distance you can remote start from is the same distance you can lock/unlock your vehicle. Increase your remote start distance with a Start-X range extender kit (sold separately).
  • 𝗢𝗽𝘁𝗶𝗼𝗻𝗮𝗹 𝗿𝗲𝗺𝗼𝘁𝗲 𝗿𝗮𝗻𝗴𝗲 𝗲𝘅𝘁𝗲𝗻𝗱𝗲𝗿 𝗸𝗶𝘁: Increase your remote start distance up to half a mile. Includes two separate remotes used to start your vehicle in place of your OEM key fob. Available in 1-way (up to 2000-feet) and 2-way (up to 3000-feet) systems.
Bestseller No. 2
Start-X Remote Starter Kit for Subaru Forester (2019, 2020, 2021), Legacy (2018-2019), and Outback (2018-2019) Vehicles | Push-to-Start Ignition | Plug & Play Install | Zero Wire Splicing
  • 𝗗𝗜𝗬 𝗿𝗲𝗺𝗼𝘁𝗲 𝘀𝘁𝗮𝗿𝘁 𝗸𝗶𝘁: Add remote start functionality to your vehicle for a fraction of the cost. Enjoy a comfortable driving experience from the start by pre-heating and defrosting your windshield in the winter or cooling down your vehicle before entering in the summer.
  • 𝗩𝗲𝗵𝗶𝗰𝗹𝗲 𝗰𝗼𝗺𝗽𝗮𝘁𝗶𝗯𝗶𝗹𝗶𝘁𝘆: SubarueBay logo Forester (2019, 2020, 2021), Legacy (2018, 2019), and Outback (2018, 2019) models with push-to-start ignition. Not compatible with Canadian vehicles.
  • 𝗩𝗲𝗵𝗶𝗰𝗹𝗲 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗺𝗲𝗻𝘁𝘀: This kit is designed for push-to-start ignition vehicles only. Not compatible if you start the vehicle by turning a key blade. Gas and automatic transmission only. Factory remote required. Some vehicle disassembly may be required; see installation guide for details. As a safety precaution, vehicle will shut down when door is opened; vehicle must be restarted before driving. Windows PC is required to complete installation.
  • 𝗪𝗔𝗥𝗡𝗜𝗡𝗚: 2022-2023 Forester models will lose the ability to unlock vehicle by pressing the unlock button when vehicle is remote started. You will need to physically insert the key to unlock. For all other vehicles, the OEM remote button will work to unlock.
  • 𝗨𝘀𝗲 𝘆𝗼𝘂𝗿 𝗳𝗮𝗰𝘁𝗼𝗿𝘆 𝗿𝗲𝗺𝗼𝘁𝗲: Start your vehicle by pressing lock 3X on your existing OEM key fob. Press lock 3X again to turn off vehicle. Factory remote required – no remote is included in this kit. The distance you can remote start from is the same distance you can lock/unlock your vehicle. Increase your remote start distance with a Start-X range extender kit (sold separately).
Bestseller No. 3
MPC Remote Start Kit Compatible with Subaru Legacy 2020-2025 || 2X 1-Button Long Range Remotes || Plug and Play || No Wire Splicing || USA Tech Support
  • WHAT'S INCLUDED - Complete remote start system compatible with SubarueBay logo Legacy 2020-2025. Package includes RF antenna with (2) one-button remotes (3,000 ft. range), plug-in remote start interface, and T-Harness. Preconfigured with the correct setup for your vehicle during installation. All required components are included. NOTE: Automatic Transmission ONLY.
  • FEATURES - Start or stop your engine and control door locks from up to 3,000 ft. away using (2) ultra-compact 1-button transmitters. Maintains entry and security functions while the vehicle is running.
  • EASY PLUG-IN INSTALLATION - Utilizes a plug-in T-harness that eliminates manual wire connections. Installation is simple and includes plug-and-play connections. We supply detailed instructions with connector locations for a smooth install. Adding optional features may require extra wiring. Someone with basic 12-volt electronics experience can typically install this kit successfully.
  • OPTIONAL - Smartphone app interface module available separately (shipping limited to the continental U.S.).
  • MPC TECHNICAL SUPPORT - United States, Tucson, AZ. Several different methods of support available. QR code instructions included to ensure the most up to date information.
Bestseller No. 4
Subaru 2015-2018 Legacy & Outback Remote Start w/Push Start - H001SAL101 - Genuine OEM
  • Remote engine start kit for 2015-2016 Legacy or Outback
  • H001SAL101 x1
  • Allows vehicle to be started at the push of a button from outside the vehicle
  • Only compatible with automatic transmission vehicles.
  • Smart Engine Start works in conjunction with the Keyless Access and Push button Start System.
Bestseller No. 5
MPC Remote Start Kit Compatible with Subaru Outback 2020-2025 || Phone App Control Included || Plug and Play || No Wire Splicing || USA Tech Support
  • WHAT'S INCLUDED - Complete remote start system compatible with SubarueBay logo Outback 2020-2025. Package includes a smartphone control module, plug-in start interface, and T-Harness. Preconfigured for your vehicle for easy setup. All components required for installation are included. NOTE: Automatic Transmission ONLY.
  • FEATURES - Smartphone control lets you start your vehicle from your mobile device; also works with the factory remote by pressing the lock button three times. App features include Lock/Unlock, Security, GPS Tracking, Trip History, and Breadcrumbing. Includes a FREE 30-day app service trial; service plan required for operation and available Monthly, or in 1-Year, 3-Year, and 5-Year options.
  • EASY PLUG-IN INSTALLATION - Utilizes a plug-in T-harness that eliminates manual wire connections. Installation is simple and includes plug-and-play connections. We supply detailed instructions with connector locations for a smooth install. Adding optional features may require extra wiring. Someone with basic 12-volt electronics experience can typically install this kit successfully.
  • OPTIONAL - Remotes: 1-Way and 2-Way, LCD 1-Mile Range (Sold Separately)
  • MPC TECHNICAL SUPPORT - United States, Tucson, AZ. Several different methods of support available. QR code instructions included to ensure the most up to date information.

Last update on 2026-06-14 / Affiliate links / Images from Amazon Product Advertising API


 

 


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