January 2023
Subaru Service and Technical Support Line Newsletter

Articles Contained
in this Issue

01

© 2023 Subaru of America, Inc. All rights reserved.

QMR of the Month

Click on a title below to jump to the article.
Click the date located in the footer to return to page 1.

CODE ARTICLE...................................................................PAGE
(00) STIS New Releases..................................... 11
(01) QMR of the Month......................................1-2

We are pleased to announce this month’s TechShare QMR of the Month
Winner:

(01) QMR of the Month Award
Presentations................................................ 2

Tarick Rehan from
Sheehy Subaru in Springfield, VA

Tech Tips Greatest Tips
(15) CP 1.0/1.5 Software Version
Verification.................................................3-4
(07) CAN Communication Diagnosis –
Where To Start? ........................................4-6
(07) BIU Replacement TIPS and Destination
.
Setting........................................................6-7
(12) 20MY+ Legacy/Outback Manual Adjustment
of Power Seat After Motor Failure.............7-8
(12) Accessory Catalog Update........................... 9
(15) SXM Preset channel logo blank on
CP 1.5 equipped vehicles, ’23 MY
Outback/Legacy & Ascent.......................... 10

SUBARU TECHLINE HOLIDAYS
& HOURS OF OPERATION
Mon. - Thurs.

8:30AM - 7:30PM EST

Friday

10:30AM - 5:00PM EST

Saturday

9:00AM - 3:00PM EST

Tarick created a high quality QMR using TechShare reporting on vehicle
would not engage is reverse until throttle applied. Tarick’s report included
detailed diagnostic steps, SSM4 project file, high-quality photos, and
videos.
Please refer to the following link to review the TechShare QMR in detail.
https://subarutechshare.com/qmrs/TS-220494
In appreciation for going the extra mile and sharing his experience with
us, Tarick will be receiving the following from his District Service Quality
Manager.

$500.00 Snap-On gift card

Continued on the next page

CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS
COULD RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.

The Subaru TechTIPS newsletter is intended for use by professional Technicians ONLY. Articles are 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,
DO NOT assume that your vehicle has or will have that condition. Impreza, Legacy, Justy, Loyale,
Outback, Forester, Subaru SVX, WRX, WRX STI, Baja, Tribeca, BRZ, XV Crosstrek, Ascent, Crosstrek
Hybrid, Solterra and “Quality Driven” are Registered Trademarks.

January 2023 TechTIPS

SUBARU OF AMERICA, INC. IS
ISO 14001 COMPLIANT
ISO 14001 is the international standard for excellence in Environmental Management Systems.
Please recycle or dispose of automotive products
in a manner that is friendly to our environment
and in accordance with all local, state and federal laws and regulations.

Page 1 of 12

01

QMR of the Month (CONTINUED)

The other Regional winners selected from QMRs submitted during November 2022 were:

•

Andrea Ungaro from Grand Subaru

•

Matthew Brito from Patrick Subaru

•

Matthew Winkelman from Lithia Reno Subaru

•

Robert Black from Van Bortel Subaru of Victor

Any Subaru Technician can participate in the TechShare QMR of the Month program. See the November
2022 issue of TechTIPS for full details. You just might see your name and photo in a future issue of TechTIPS!

01

QMR of the Month Award Presentations

As part of our “enhanced” QMR of the Month recognition program, we will include a photo (whenever
available) of the recipient’s award presentation in TIPS. The winner selected from QMR of the Month
submissions received during November 2022 was Senior Master Technician Tarick Rehan from Sheehy
Subaru of Springfield, VA.

Pictured left to right is Sheehy Subaru Parts Director Davis Prowett, Sheehy Subaru General Manager Russ
Zakeri, Sheehy Subaru’s Service Director Ben Ong, Sheehy Auto Stores Chief Financial Officer Joe Shine,
Subaru of America (SOA) District Service Quality Manager Dan Rockholt, Sheehy Subaru Senior Master
Technician and QMR of the Month winner Tarick Rehan, SOA District Sales Manager Andrew Raszewski,
SOA District Parts/Service Manager Cory Hiken, Sheehy Auto Stores Used Vehicle Director Paul Sheehy, and
Sheehy Subaru Service Manage Jonah Kabazzi. Tarick was presented with a $500.00 Snap-On Gift Card.
Congratulations and THANK YOU to our November 2022 QMR of the Month Award recipient!

Continued on the next page
January 2023 TechTIPS

Page 2 of 12

This series features TechTIPS articles frequently referred to by Techline. This month’s feature is from
February 2021.

15

CP 1.0/1.5 Software Version Verification

Reminder: For infotainment related concerns please always remember to review the “Forms and
Downloads” Gen 4/Denso tab on Subarunet. All TSB’s related to each head unit are listed on their
respective tabs.

TSB 15-259-20R “Denso Gen 4 Cockpit One (CP1) Infotainment System Operating TIPS
Technical Support Guide.”
TSB 15-304-22 “Procedure for Techline Infotainment Concern Data Collection and Sharing via
TechShare”
When confirming CP 1.0/1.5 system software version information, it is critical to allow the unit
to finish the boot-up process before accessing the version information screen. Failure to allow
the process to complete could result in missing version information or asterisk symbols (****) as
shown below. A good practice would be to wait a minimum of 3 minutes after the boot-up
process begins at key on for this information to load properly.

Continued on the next page
January 2023 TechTIPS

Page 3 of 12

15

CP 1.0/1.5 Software Version Verification (CONTINUED)

However, this should not be confused with no “RAD_SW” version and “DSP_FW” version
displayed or showing asterisk symbols (****) AFTER waiting for the system to completely
boot-up. That would be a sign of a failed software update. For more details see Subarunet
announcement “Recall WRH-20 / WRI-20 Denso Gen 4 CP1 software update. Critical points
to avoiding unnecessary hardware replacement” posted January 5, 2021. Note: “Deck”
version as asterisk symbols (****) is normal when a CD Player is not installed.

07

CAN Communication Diagnosis – Where To Start?

When diagnosing a LAN system, it is important to understanding how the system works. LAN system diagnosis can get overwhelming, it is important to start with the basics. Always verify the Select
Monitor and interface module/cables are in good working order, and know the type of system you are
working on.

Begin the diagnosis with an all-DTC scan, can we communicate? If yes, what modules can we
communicate with? What codes do we have and are they current? If we can communicate with all
modules and have history U-codes, the issue may be intermittent and not currently present. At this
point it is important to analyze what systems are setting codes and what modules they cannot communicate with. If there is an issue with the CAN system, determine which bus the fault is on. Do the
codes all indicate one specific module, or multiple modules all from the same bus? If the codes are
current and we cannot communicate with those indicated modules, or we cannot communicate at all,
it is important to adjust your diagnosis accordingly.
If there is no communication with the vehicle at all,
but the vehicle does not seem to indicate any issue
(i.e.: rough running, warning lights) there may be an
issue with the scan tool connecting or the data link
connector circuit. Does the SSM connect with other
vehicles? Do we have a good connection at the OBD
port? Is the DLC circuit missing anything? Verify
power and grounds. If no problems are found, inspect
the CAN circuit resistance at the DLC. Do we have
the correct resistance reading based on the service
manual specification?
January 2023 TechTIPS

Continued on the next page
Page 4 of 12

07

CAN Communication Diagnosis – Where To Start? (CONTINUED)

Older model specifications may be 52-62 Ω (CAN C) while newer models may be 114-126 Ω (Diag
CAN). Always verify what type of system you are working on. On models equipped with K-Line, this is
a one wire communication, Verify no open to the next closest module, no short to ground/power. Often
on a system with a faulty K-Line, aftermarket scan tools will communicate.
If no communication is possible, but there is a clear issue of system failure, inspect each bus individually. On systems with Diagnostic CAN, you will need to access the network at one of the modules on
the bus. Verify the module of the connector you are using does not have a terminating resistor as this
will affect your results.
Refer to the “CAN communication circuit check” found in the service manual. The all-DTC scan will
tell us which modules cannot communicate with each other. Then inspect the circuit between those
modules. If every module on a given bus is down, the harness could be shorted to power/ground. If the
harness is ok, the issue could be a faulty module pulling the bus down. Disconnecting each module
until communication with the other modules is restored is a quick check.

If communication to only one module is down, verify that module has
power and ground supply and a good connection to the CAN circuit.
If all tests ok, the module itself may need replacement.
Always verify no aftermarket accessories wired to the CAN system, or
wiring repairs outside Subaru recommendations.
January 2023 TechTIPS

Continued on the next page

Page 5 of 12

07

CAN Communication Diagnosis – Where To Start? (CONTINUED)

“The Subaru warranty manual dictates that the harnesses must be replaced if any physical damage
occurs to CAN B or C wiring (Twisted pair) under warranty. Outside of the warranty period, customer pay repairs to the wiring may be performed. Industry standard repair procedures must be used.
Following the procedure listed in STIS. The proper twist must be maintained and the length between
CAN high and low must be maintained to ensure message synchronization.”
NOTE: Review the terminators for each CAN circuit. The DLC (Diagnostic) CAN includes
one terminating resistor (120 ohms). The DLC is no longer connected in parallel to any CAN
circuit. Measuring Powertrain CAN or Body CAN total circuit resistance at the DLC is no longer
possible.
For more diagnostic information refer to the Vehicle Communications Technician Reference
Booklet and October 2021 TechTIP. The Vehicle Communications TRB is an excellent resource
for understanding and diagnosing communication concerns.

07

BIU Replacement TIPS and Destination Setting

When installing a new Body Integrated Unit (BIU), it is important
to verify the correct steps to perform. It is always recommended
to follow the Service Manual procedure on how to program and
register the BIU. There could be some confusion on models that
require a destination code entry. The first letter
indicates the country, such as U4 = U.S., and C0 = Canada. In
every case, a U.S. vehicle will require a U400 entry. If communication to the original BIU is possible, it is always recommended to use
the read/write function with the SSM. If the incorrect destination
code is input, it cannot be changed back. Please see previous
TechTIPS concerning other issues and info when registering a BIU.
03/05 – A-Type BIU Replacement
05/11 - Remote Trunk Release Inop After BIU Replacement
10/13 - BIU Replacement on Push-button Start Vehicles
01/15 - (BIU) Replacement/ Interior Lights Flashing
09/20 - Replacing B/G-Type BIU
Continued on the next page
January 2023 TechTIPS

Page 6 of 12

07

BIU Replacement TIPS and Destination Setting (CONTINUED)

12

20MY+ Legacy/Outback Manual Adjustment of Power Seat After Motor Failure

It has been found that on MY20+ Legacy/Outback, the bolts to remove the seat can only be accessed
with the seat position adjusted to a specific position. In a scenario where the slide motor fails and this
postion cannot be achieved, there is a manual adjustment that can be made to expose the bolts to
remove the seat. Further information can be found by viewing QMR TS-215498.

The rear in-board mounting bolt is
now vertical as opposed to previous
generations that were installed at
an angle. As a result the seat needs
to be in a forward postion to access.

Continued on the next page
January 2023 TechTIPS

Page 7 of 12

12

20MY+ Legacy/Outback Manual Adjustment of Power Seat After Motor Failure
(CONTINUED)

If the slide motor is not able to be used to move the seat in the forward position, there is a T20 TORX
head bolt at the front of the seat rail/frame that can be used to move the seat manually forward and
back. The T20 Torx bolt for adjustment is on both the left and right hand seat rails, one bolt will move
the seat forward and the opposite bolt will move the seat backward.
NOTE: This function is available on both the passenger and driver side front seats with the power seat
option.

If the motor to raise and lower the seat bottom fails, there is no manual ‘adjustment screw’ available.
The technician will need to remove the seat side cover and physically unbolt/remove the motor.

Continued on the next page
January 2023 TechTIPS

Page 8 of 12

12

Accessory Catalog Update

The Accessory Replacement Catalog found on Subarunet will no longer be updated with ‘23+ model
year vehicles.

Technicians often use this to find and verify parts numbers for Accessories. This information can
now be found in the Snap-On parts catalog and on Subarunet “Application Charts/Pricing” tab in the
location shown below:

Continued on the next page
January 2023 TechTIPS

Page 9 of 12

15

SXM Preset channel logo blank on CP 1.5 equipped vehicles, ’23 MY Outback/
Legacy & Ascent

On all vehicles equipped with a CP 1.5 head unit (’23 Legacy/
Outback/Ascent) the SXM channels presets will not show the
specific SXM channel logos when the vehicle is new. This is a
normal condition.
This condition is due to the head unit not receiving any SXM
signal. While the vehicle is in transport to the retailer the backup fuse is not installed.
The head unit does not turn on or receive power until the backup fuse is installed during the PDI procedure.
It will take 4-6 hours of the vehicle receiving SXM signal (key
on, engine running) for all the SXM channel logos to appear.
Do not replace any parts for this concern.
Most vehicles will not have enough run time for the SXM channel
logos to appear when the vehicle is delivered to the customer.
This is a normal condition.
The presets may not appear if the vehicle is only driven short
distances or operated in an area with poor SXM signal. The
vehicle does not need to be operated for 4-6 hours at one time
for this to complete.
The SXM channel logos may start to appear slowly and one at a
time. This is a normal condition.
If this concern is present after 6 hours of the vehicle being
operated in a known good SXM signal area, please refer to TSB
15-304-22. Collect a data log, all other requested information
and submit an Infotainment case using Techshare.

Continued on the next page
January 2023 TechTIPS

Page 10 of 12

00

STIS New Releases

ITEM CODE

15-305-22R
WRE-23R
J501SFN230
J101SFN000XX
J101SFN000XX
J1010FN800
J1010FN800
F6010FN000
SOA733A001
J101SFN500
F411SFL090
F411SFL080
F411SFL070
F411SFL060
F411SFN010
F411SFN000
F411SFN020
J501SFN270
E771SFN200
E7210FN010
J501SFN240
J1010FN500
SOA801P091xx
F551SFN000
WRL-22R
WRA-23R
09-98-22
E771SFN000
J101SFN100
J101SFN400
WRB-23R
15-261-20R
07-219-23
07-218-23
15-236-18R
07-207-22R

ITEM TYPE

Technical Service Bulletin
Subaru Product/Campaign Bulletin
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Subaru Product/Campaign Bulletin
Subaru Product/Campaign Bulletin
Technical Service Bulletin
Accessory Installation Guide
Accessory Installation Guide
Accessory Installation Guide
Subaru Product/Campaign Bulletin
Technical Service Bulletin
Service Diagnostics
Technical Service Bulletin
Technical Service Bulletin
Technical Service Bulletin
Technical Service Bulletin

All revised publications are highlighted in yellow.
January 2023 TechTIPS

CREATED
DATE

TITLE

Reprogramming File Availabilit...
Solterra Hub Bolt Torque
24MY Impreza Rear Seatback Pro...
2024MY Impreza and Crosstrek B...
2024MY Impreza and Crosstrek B...
2024MY Crosstrek Lower Door Cl...
2024MY Crosstrek Lower Door Cl...
2024MY Impreza and Crosstrek R...
2024MY Impreza and Crosstrek P...
2024MY Impreza & RS Mud Flaps
2024MY Impreza Rear Seat Cover...
2024MY Impreza Rear Seat Cover...
2024MY Crosstrek Rear Seat Cov...
2024MY Crosstrek Rear Seat Cov...
2024MY Impreza Front Seat Cove...
2024MY Crosstrek Front Seat Co...
2024MY Crosstrek and Impreza P...
2024MY Crosstrek Pet-friendly ...
2024MY Impreza Rear Bumper App...
2024MY Impreza and Crosstrek (...
2024MY Crosstrek REAR SEATBACK...
2024MY Crosstrek (all trims ex...
2024MY Crosstrek Door Edge Gua...
2024MY lmpreza, Crosstrek, Cro...
PTC Heater Ground Bolt
2022 MY WRX Corrected Owner’s ...
Camshaft Position Correlation ...
2024MY Crosstrek Rear Bumper C...
2024MY Crosstrek Splash Guard
2024MY Crosstrek (non-Wilderne...
Telematics Data Communications...
Reprogramming File Availabilit...
2023 WRX Service Manual V2
Genuine Alternative Battery Re...
Genuine Alternative Battery Re...
Reprogramming File Availabilit...
Subaru Battery Drain Product L...

24-Feb-23
22-Feb-23
22-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
21-Feb-23
20-Feb-23
20-Feb-23
20-Feb-23
16-Feb-23
16-Feb-23
16-Feb-23
15-Feb-23
13-Feb-23
12-Feb-23
10-Feb-23
10-Feb-23
7-Feb-23
3-Feb-23

Continued on the next page
Page 11 of 12

*** Now you can e-mail your TechTIPS input and suggestions to: tech@subaru.com ***
This is your chance to offer suggestions for use in future issues of TechTIPS! Make
sure that if you e-mail us, you place in the subject line of your e-mail “For TechTIPS
Newsletter”. Thank you!
Model:
Year:
VIN:
Description of situation encountered:

Your suggestion for repair procedure, product improvements, etc.:

Please attach separate sheets, if necessary. You may also want to include Service Manual
diagrams or references, or your own drawings to assist in describing your suggestion. All
information submitted becomes the property of Subaru of America, Inc. Permission is granted
to Subaru of America, Inc. to print your name and suggestions in TechTIPS and other Subaru of
America, Inc. publications. Mail items to: PO Box 9103; Camden, NJ 08101-9877.
Your Name:
Signature:
Dealer’s Name:
City:
Date:
Dealer Code:

SUBARU
TECHLINE
Hours of Operation
January 2023 TechTIPS

Monday – Thursday 8:30 am to 7:30 pm
Friday 10:30 am to 5 pm and Saturday 9 am to 3 pm
Continued on the next page
Page 12 of 12