ATTENTION:
GENERAL MANAGER

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PARTS MANAGER

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CLAIMS PERSONNEL

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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.

SERVICE MANAGER

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

SERVICE BULLETIN
APPLICABILITY:

2024MY Crosstrek & Impreza

NUMBER: 04-29-23R

SUBJECT:

DATE: 06/05/23
Electronic Power Steering Reprogramming Files/
REVISED: 03/13/24
DTCs C2531 & C2532, U0122, & B2811

INTRODUCTION:
This bulletin announces the availability of new reprogramming files for the Electronic Power Steering
(EPS) control module developed to address the following DTCs being detected by the EPS.
•

C2531 (Control Module CPU)

•

C2532 (Control Module Peripheral Circuit)

•

U0122 (Lost Communication with Vehicle Dynamics Control Module)

•

B2811 (EPS Abnormal)

The new files contain enhanced logic for the self diagnosis program within the EPS. If these DTCs
are found stored in the EPS memory, follow the procedures outlined below.
PRODUCTION CHANGE INFORMATION:
The new files have been incorporated into vehicle production as per the table below. Additional VIN
breakdown information is outlined in Appendix A on pg. 4
Model

Starting VIN

Impreza/Crosstrek SIA Produced

R3756650

Impreza/Crosstrek Japan Produced

RH321601

CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD
RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
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 this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.

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.

Continued...
Bulletin Number: 04-29-23R; Revised: 03/13/24

Page 1 of 5

PFC FILE APPLICABILITY:
The reprogramming files listed in the table below can be found on SSM5-R.
MY

2024

Model

File Description

Old Part Number

OLD Rom ID

NEW Rom ID

CROSSTREK

2AD0000908_ ____.pfc

34110FN013
34110FN014
34110FN013

2AD0000905
2AD0000906
2AD0000907

2AD0000908/2A
D0000908

IMPREZA

2AD0000908_ ____.pfc

4110FN033
34110FN034
34110FN035

2AD0000905
2AD0000906
2AD0000907

2AD0000908/2A
D0000908

CROSSTREK
WILDERNESS

2AD0000A05_ ____.pfc

34110FN02A
34110FN02B

2AD0000A03
2AD0000A03
2AD0000907

2AD0000A05
2A D0000A05

34110FN092
34110FN093
34110FN094

2AD0000A02
2AD0000A03
2AD0000907

2AD0000A05
2A D0000A05

34110FN102
34110FN103
34110FN104

2AD0000A02
2AD0000A03
2AD0000907

2AD0000A05
2A D0000A05

IMPREZA with
18 inch wheels

2AD0000A05_ ____.pfc

SERVICE PROCEDURE / INFORMATION:
STEP 1: Using SSM, perform a DTC check. Are DTCs C2531, C2532, U0122, and/or B2811
detected by the EPS control module?
YES: Proceed to the next Step.
NO: Diagnose all other DTCs as per the applicable Service Manual.
STEP 2: Start the engine for 20 seconds. Turn the engine off for 10 seconds. Repeat this Step 10
times.
STEP 3: Using Subaru Select Monitor 5 (SSM5-R), confirm the ROM ID is suitable for
reprogramming. The current ROM ID version is displayed in SSM5-R. Select “Start” then “Vehicle.”
Read the column labeled “CID/ROMID/SWID.” Compare the reading to the PFC File Applicability
table on above.

Continued...
Bulletin Number: 04-29-23R; Revised: 03/13/24

Page 2 of 5

Once the EPS is confirmed to be suitable for reprogramming, install the new EPS Control Module
software following the normal SSM5-R procedure. Detailed information regarding the SSM5-R
reprogramming procedures can be found in TSB 14-28-21R.
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
Reprogram the EPS Control Module following the normal SSM5-R procedure. Detailed information
regarding the SSM5-R reprograming procedures can be found in TSB 14-28-21R.
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
Subaru of America, Inc. (SOA) highly recommends utilizing either the Subaru Midtronics DCA8000
Dynamic Diagnostic Charging System or the Subaru Midtronics GR8-1100 Diagnostic Battery
Charger to the vehicle and utilizing the Power Supply Mode feature anytime a vehicle control module
is being reprogrammed. Once the Midtronics charger is connected to the vehicle, if the battery is fully
charged, it takes less than three (3) minutes to boot-up the charger, select the Power Supply Mode,
and have the battery voltage stabilized and ready for reprogramming.
NOTES:
•

For instructions on using the Power Supply Mode, reference the applicable User Manual for
the Midtronics DCA-8000 Dynamic Diagnostic Charging System and the Midtronics GR81100 Diagnostic Battery Charger on STIS.

•

Confirm all electrical loads such as lights, audio, HVAC, seat heaters, and rear defroster are all
switched OFF before setting up the charger for Power Supply Mode.

•

Select the correct battery type (Enhanced Flooded, Flooded, Gel, AGM or AGM Spiral).

•

Input the CCA which matches the vehicle’s battery. NOTE: OE and replacement batteries have
different CCA ratings. Always confirm the battery’s CCA rating before proceeding.

•

If using a DCA-8000 Dynamic Diagnostic Charging System, set the power supply voltage to
13.5 Volts.

•

DO NOT connect the DST-i or DST-010 until the Power Supply mode function has completed
its battery test mode and the Charging Voltage has dropped to and shows a steady 13.5 Volts on
the display.

•

Once Power Supply Mode reaches a steady 13.5 Volts, connect the DST-i or DST-010 to the
OBD connector and proceed with initiating the normal SSM5-R reprogramming process.

•

Amperage will fluctuate based upon the vehicle’s demand for power. NOTE: If the voltage
rises beyond 14 Volts while programming is in process, the procedure will abort. This can
indicate a need to test or charge the vehicle battery before any further attempt at programming
is made.

•

ALWAYS set the power supply voltage to 13.5 Volts when using Power Supply Mode. NEVER
turn the ignition switch on when charging at voltages 15 Volts or higher.

•

Control module failures resulting from battery discharge during reprogramming are not a
matter for warranty. Should any DTCs reset after the reprogramming update is performed,
diagnose per the procedure outlined in the applicable Service Manual.

Bulletin Number: 04-29-23R; Revised: 03/13/24

Page 3 of 5

REMINDER: If the DCA-8000 or GR8-1100 indicates the vehicle’s battery must be charged, charge
the battery fully before proceeding to reprogram the vehicle while using the Power Supply Mode.
WARRANTY / CLAIM INFORMATION:
For vehicles within the Basic New Car Limited Warranty period or covered by an active Added
Security Classic or Gold, this repair may be submitted using the following claim information:
Labor Description

Labor Operation #

Fail Code

Labor Time

EPS CONTROL MODULE REPROGRAMMING

A659-055

RDR-48

0.4

NOTE: The pfc file listings provided in this bulletin are the latest available at the time of publishing.
Updates are often released thereafter without revision to the original bulletin. For this reason, it is
critical to always have the latest version of Select Monitor software installed on your system. You can
confirm if a later version is available by entering the CID/ROMID listed in this bulletin into SSM5-R.
If a newer CID/ROMID is shown as available in SSM5-R, reprogram using that file.
IMPORTANT REMINDERS:
•

SOA strongly discourages the printing and/or local storage of service information as previously
released information and electronic publications may be updated at any time.

•

Always check for any open recalls or campaigns anytime a vehicle is in for servicing.

•

Always refer to STIS for the latest service information before performing any repairs.

Continued...
Bulletin Number: 04-29-23R; Revised: 03/13/24

Page 4 of 5

Appendix A
Vehicle Identification Number Breakdown Information:
Impreza Example:
JF1GUABCXR8200001

Crosstrek Example:
JF2GUABCXR8200001

Bulletin Number: 04-29-23R; Revised: 03/13/24

Page 5 of 5