Remote Engine St

Remote Engine Start Systems
Troubleshooting Guide
Applicable to 2017MY+ Impreza, 2018MY+
Crosstrek, 2019MY+ Ascent, 2019MY+
Forester, 2020MY+ Legacy/Outback and
2022MY+ WRX with “Key Start” Ignition
!IMPORTANT!
• 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.”
TSG 900MHz KS
Rev. 02/1/22
Table of Contents
RES System Part Information
Please Note: The service part numbers referenced above are current as of
the revision of this document. Please check with your parts department for
verification.
RES System Part Information
Please Note: The service part numbers referenced above are current as of
the revision of this document. Please check with your parts department for
verification.
RES System Part Information
Please Note: The service part numbers referenced above are current as of
the revision of this document. Please check with your parts department for
verification.
RES System Part Information
Please Note: The service part numbers referenced above are current as of
the revision of this document. Please check with your parts department for
verification.
RES System Part Information
Please Note: The service part numbers referenced above are current as of
the revision of this document. Please check with your parts department for
verification.
RES System Part Information
Please Note: The service part numbers referenced above are current as of
the revision of this document. Please check with your parts department for
verification.
System Layout - 17-18MY Impreza / 18MY Crosstrek
System Layout - 17-18MY Impreza / 18MY Crosstrek
System Layout - 19MY+ Impreza / Crosstrek
System Layout - 19MY+ Impreza / Crosstrek
System Layout - 19MY+ Ascent, 19MY+ Forester
System Layout - 19MY+ Ascent, 19MY+ Forester
System Layout - 20MY+ Legacy / Outback
System Layout - 20MY+ Legacy / Outback
System Layout - 22MY+ WRX
System Layout - 22MY+ WRX
Remote Engine Start Control Module Registration Procedure - SSM IV (DST-i)
17MY+ Impreza, 18MY+ Crosstrek, 19MY+ Ascent and 19-21MY Forester
NOTE: Once the Ignition is turned ON, the RES system will exit System Registration after 2 minutes.
Remote Engine Start Control Module Registration Procedure - SSM IV (DST-i)
20MY+ Legacy / Outback, 22MY+ Forester, 22MY+ WRX
NOTE: Requires Network-Enabled Laptop - Ensure software version is Revision 18.1.1 or newer
(July 2019 update)
NOTE: Once the Ignition is turned ON, the RES system will exit System Registration after 2 minutes .
Remote Engine Start Control Module Registration Procedure - SSM IV (DST-i)
20MY+ Legacy / Outback, 22MY+ Forester, 22MY+ WRX
NOTE: Requires Network-Enabled Laptop - Ensure software version is Revision 18.1.1 or newer
(July 2019 update)
NOTE: Once the Ignition is turned ON, the RES system will exit System Registration after 2 minutes .
Remote Engine Start Bi-directional Transmitter Programming Procedure
NOTE: Up to eight (8) transmitters can be programmed to the remote engine start system.
1. Open the driver’s door and enter the vehicle. The driver’s door must remain open throughout the entire
programming process. Ensure all other vehicle doors, trunk, hatch or rear gate are closed.
2. Verify that the transmission shifter is in the “park” position.
3. Turn the ignition “ON” then “OFF”, “ON” then “OFF”, “ON” then “OFF”, then back “ON” and leave on throughout
the entire programming process. (ON/OFF ignition cycles must be completed within five (5) seconds.)
4. The system will flash the side marker lights, taillights and parking lights and honk the horn three (3) times
indicating that the system has entered transmitter learn mode.
5. Press and hold the
button on the transmitter to be learned for three (3) seconds until the system flashes
the side marker lights, taillights and parking lights and honks the horn one (1) time, indicating that the system
has learned the transmitter. Release the
button. Upon successful programming, the remote start
transmitter may flash/beep one (1) time.
6. Repeat step five (5) for additional transmitters. The system will accept up to eight (8) transmitters.
7. Turn the ignition OFF to exit transmitter learn mode.
NOTE: The system will exit transmitter learn mode if the ignition is turned OFF, the driver’s door is closed
or thirty (30) seconds of inactivity.
Subaru RES Transmitter Programming - Video Link
Remote Engine Start Run Time Selection
The system is pre-programmed to run for fifteen (15) minutes before automatically stopping. The
programmed run time can be changed to alternate times using the following procedure.
1. Enter the vehicle and close all vehicle doors, trunk or rear gate.
2. Verify that the transmission shifter is in the “park” position.
3. Turn the ignition “ON” then “OFF”, “ON” then “OFF”, “ON” then “OFF”, then back “ON” and leave on throughout
the programming process. (Four (4) ignition cycles ending in “ON” must be completed within eight (8) seconds.)
4. The system will honk the horn the number of times corresponding to the current run time setting.
5. Open and close the driver’s door to advance to the next run time setting. The system will honk
the horn the number of times corresponding to the new run time setting.
6. Turn the ignition OFF to exit run time selection mode.
NOTE: The system will exit run time selection mode if the ignition is turned OFF or thirty
(30) seconds of inactivity. Upon exit, the current run time selection will be stored.
Subaru RES Selectable Run Time Programming - Video Link
Horn Honks
Run Time
1
Three (3) Minutes
2
Five (5) Minutes
3
Ten (10) Minutes
4
Fifteen (15) Minutes
(Default Setting)
Remote Engine Start Activation Horn Honk Diagnostics
When activating the remote engine start system, the vehicle will respond with various horn honks and exterior vehicle light
flashes. The sequence of the horn honks/light flashes can help to differentiate between normal and abnormal operation and
aid in troubleshooting. Below is a description of the various horn honk/light flash sequences and description of each function.
Prevent Remote Engine Start - Hood Switch - Video Link
Prevent Remote Engine Start - Brake Switch - Video Link
Prevent Remote Engine Start - Key In Ignition - Video Link
Prevent Remote Engine Start - Shifter Out of Park - Video Link
Prevent Remote Engine Start - Door Open - Video Link
Remote Engine Start Diagnostic Mode
The remote engine start module is equipped with a diagnostic mode that will aid in troubleshooting abnormal failure to start
or abnormal shut down conditions. The diagnostic mode saves the last abnormal failure to start or abnormal shut down in
memory. This is particularly helpful in determining a past failure when the system may not be currently exhibiting the observed
failure mode. Normal shut downs will not be included in the diagnostic table. Normal shutdowns include: run time expiration,
shut down or failure to start when a vehicle door is opened and shut down via the RES transmitter.
Accessing diagnostic mode:
1. Enter the vehicle and close all vehicle doors, trunk or rear gate.
2. Verify that the transmission shifter is in the “park” position.
3. Turn the ignition to the “ON” position and leave on for approximately 2 seconds then “OFF”, “ON” then “OFF”, “ON” then
“OFF”, “ON” then “OFF”, “ON” then “OFF”, then back “ON” and leave on throughout the programming process. (Six (6)
ignition key cycles ending in “ON”, total duration from point of second ignition “ON” cycle must not exceed eight (8)
seconds.)
NOTE: In order to avoid accidentally entering Run Time Selection Mode (see page 22 of this guide), cycle the ignition
from OFF to ON six (6) times as quickly as possible.
4. The system will flash the side marker lights, tail lights, front position lights and honk the horn a number of times
corresponding with the below table.
Remote Engine Start Shutdown - Overrev Protection - Video Link
Prevent Remote Engine Start - Shifter Out of Park - Video Link
Advanced Troubleshooting
The RES system will not run for the full default 15-minute run time.
The RES system will not operate when activated multiple times in a row.
Advanced Troubleshooting
The RES system shuts down when any vehicle door, trunk or rear gate is opened.
Remote Engine Start Shutdown - Door Open - Video Link
The vehicle starts by itself without pressing the RES transmitter button.
Advanced Troubleshooting
The SSM IV (DST-i) screen displays “Registration Failure” when attempting to register the RES
control module to the vehicle.
Advanced Troubleshooting
CAN Diagnostic Trouble Codes (“U codes”) are triggered in the vehicle.
Advanced Troubleshooting
The vehicle’s ignition turns ON when the RES system is activated but it does not crank the starter.
Advanced Troubleshooting
The RES system does not turn ON the vehicle’s ignition circuits after receiving the remote start
command.
Advanced Troubleshooting
The vehicle starts when the RES system is activated, but the heater / air conditioning
does not turn ON.
Advanced Troubleshooting
The RES system does not respond when the RES transmitter button is pressed 2-times.
Advanced Troubleshooting
The RES system bi-directional feature does not function.
Advanced Troubleshooting
The vehicle’s ignition turns ON and the honk honks two (2) times when activating the RES system.
Advanced Troubleshooting Video Links
Subaru Remote Engine Start Troubleshooting Videos
Video #
Video Link
Vehicle Response
(# of Horn Honks)
Description
One (1) Horn Honk for RES Activation
1
Reasons for RES Shutdown - Any Door Open
Remote Engine Start Shutdown - Door Open
NO Horn Honks for RES Shut Down
One (1) Horn Honk for RES Activation
2
Remote Engine Start Shutdown - Overrev Protection
Reasons for RES Shutdown - RPMs > ~3,500
NO Horn Honks for RES Shut Down
3
Prevent Remote Engine Start - Brake Switch
4
Prevent Remote Engine Start - Door Open
5
Prevent Remote Engine Start - Hood Switch
6
Prevent Remote Engine Start - Key In Ignition
Two (2) Horn Honks
Six (6) Horn Honks
Two (2) Horn Honks
Reasons to Prevent RES - Brake Pedal Depressed / Switch Active
Reasons to Prevent RES - Any Door Open
Reasons to Prevent RES - Hood Open / Switch Active
Ignition Turns "ON"
Reasons to Prevent RES - Key in Ignition Switch
Two (2) Horn Honks
Ignition Turns "ON"
7
Prevent Remote Engine Start - Shifter Out of Park
Reasons to Prevent RES - Gear Selector / Shifter out of Park
Two (2) Horn Honks
8
Subaru RES Selectable Run Time Programming
9
Subaru RES Transmitter Programming
Four (4) Horn Honks
to access
Selectable Run Time Programming
Three (3) Horn Honks
to access
RES Transmitter Programming
RES Programming - Selectable Run Time - 3, 5, 10 or 15 (Default) Minutes
RES Programming - Transmitter Learn Mode (Stores up to 8 Fobs)
35