NHTSA ID Number: 11034241
Manufacturer Communication Number: 05-98-26
TSB/Document Date: 2026-07-01
Summary
This bulletin announces the availability of new reprogramming files developed to address cases in which the following DTCs are detected by the Electric Control Damper Control Unit (ECU Damper).
ATTENTION:
GENERAL MANAGER
q
PARTS MANAGER
q
CLAIMS PERSONNEL
q
IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.
SERVICE MANAGER
q
© 2026 Subaru
of America, Inc. All rights reserved.
SERVICE BULLETIN
APPLICABILITY:
SUBJECT:
2022-26MY WRX
C2922, C2923, C2924, C2925,
C2926, C2927, C2928, C2929
/ Reprogramming Files
NUMBER:
05-98-26
DATE:
06/02/26
INTRODUCTION:
This bulletin announces the availability of new reprogramming files developed to address cases in
which the following DTCs are detected by the Electric Control Damper Control Unit (ECU Damper).
C2922: DAM G SENSOR SHORT TO BATTERY (FL)
C2923: DAM G SENSOR CIRCUIT OPEN (FL)
C2924: DAM G SENSOR SIGNAL (FL)
C2925: DAM G SENSOR SHORT TO GROUND (FR)
C2926: DAM G SENSOR SHORT TO BATTERY (FR)
C2927: DAM G SENSOR CIRCUIT OPEN (FR)
C2928: DAM G SENSOR SIGNAL (FR)
C2929: DAM G SENSOR SHORT TO GROUND (FL)
The new software contains enhanced logic that provides a more accurate detection of the DTCs listed
above. If any of these DTCs are detected, perform the procedure outlined in this bulletin.
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: 05-98-26; Date: 06/02/26
Page 1 of 6
PRODUCTION CHANGE INFORMATION:
This software has already been incorporated into the VIN listed in the chart below.
Model
Starting VIN
WRX
JF1VBAV60T8804555
PFC FILE APPLICABILITY:
File Name
Old Part Number
Old CID/ROM ID
New CID/ROM ID
DAM_20342VC011.pfc
20342VC010
1EA0000001
1EA0000011
DAM_20342VC041.pfc
20342VC040
3EA0000005
3EA0000015
DAM_20342VC051.pfc
20342VC050
4EA0000006
4EA0000016
PAK FILE APPLICABILITY:
File name
Old Part Number
Keyword
New CID
DAM_20342VC011.pk2
20342VC010
055E973A
1EA0000011
PART INFORMATION:
REMINDER: Always order the most up-to-date replacement parts based on the specific VIN being
repaired.
Old Part Number
Description
New Part Number
20342VC010
ECU Damper
20342VC011
20342VC040
ECU Damper
20342VC041
20342VC050
ECU Damper
20342VC051
Continued...
Bulletin Number: 05-98-26; Date: 06/02/26
Page 2 of 6
SERVICE PROCEDURE / INFORMATION:
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
Electric control damper warning light is illuminated.
Check DTCS
Are any of these
DTCs present:
C2922
C2923
C2924
C2925
C2926
C2927
C2928
C2929
YES
Are any of the
DTCs listed previously
active?
Perform diagnostic as per the
applicable Service Manual
NO
YES
The DTCs are current.
Perform Diagnostics as per the
applicable service manual.
NO
Did the troubleshoot lead
to the replacement of a G
sensor and/or a harness
YES
Replace the G sensor
and/or harness.
Replace the ECU
Damper.
Was the part number
installed:
20342VC010
20342VC040
20342VC050
YES
Perform ECU Damper Reprogramming
NO
END
Continued...
Bulletin Number: 05-98-26; Date: 06/02/26
Page 3 of 6
Step 1: Check DTCs. Are any of these DTCs C2922, C2923, C2924, C2925, C2926, C2927, C2928,
C2929 present?
Yes: Go to Step 2.
No: Perform diagnostic as per the applicable Service Manual
Step 2: Are any of these DTCs C2922, C2923, C2924, C2925, C2926, C2927, C2928, C2929
current?
Yes: Perform diagnostics per the applicable service manual, then go to Step 3.
No: Perform ECU Damper Reprogramming.
Step 3: Did the diagnostic lead to the replacement of a G sensor or a harness replacement or repair?
Yes: Perform the recommended repair as per the trouble shooting and then perform the ECU
Damper Reprogramming.
No: Go to Step 4.
Step 4: Did the diagnostics lead to the replacement of the ECU Damper?
Yes: Replace the ECU Damper confirm that the installed part is listed under a new part number
in the parts information section. If the part number is listed as an old part number, perform ECU
Damper Reprogramming.
No: End
For 2022MY WRX follow the normal FlashWrite procedure. Ensure the DCA-8000 is set to power
supply mode and connected to the vehicle’s battery.
For 2023-26MY WRX follow the normal SSM5-R reprogramming procedure which can be found in
TSB 14-28-21R. Ensure the DCA-8000 is set to power supply mode and connected to the vehicle’s
battery.
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 GR8-1100
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.
Continued...
Bulletin Number: 05-98-26; Date: 06/02/26
Page 4 of 6
•
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.
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.
NOTE: 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.
WARRANTY / CLAIM INFORMATION:
For vehicles within the Basic New Car Limited, covered by an active Subaru Added Security Classic
or Gold plan, this repair may be submitted using the following claim information:
Claims
Type
Labor
Description
Labor
Operation #
Labor
Time
Fail
Code
Dispatch
Assignment
WC, SAS
REPROGRAM ECU
DAMPER *
A566886
0.4h
TUP48
SG 06 / SL 02
Labor Description
Labor
Operation #
Labor
Time
Fail
Code
Dispatch
Assignment
DAMPER ECU REPROGRAM AND REPLACE*
B567286
0.8h
UXM42
SG 06 / SL 02
ADJUSTABLE RIDE CONTROL DIAGNOSTICS
C566399
0.5h
Claims
Type
WC, SAS
Claims
Type
WC, SAS
Labor Description
Labor
Operation #
Labor
Time
Fail
Code
DAMPER ECU REPROGRAM
AND FRONT G SENSOR OR
HARNESS R&R*
B566386
0.8h
ADJUSTABLE RIDE CONTROL
DIAGNOSTICS
UXN42; GSENSOR
OR
UXO42 ; DAMPER HARNESS
C566399
Dispatch
Assignment
SG 06 / SL 02
0.5h
The Skill Group and Skill Level listed in this bulletin define the qualifications recommended for
this work. Repairs should be dispatched to a technician who is trained at the specified level. For
more information on Labor Operation Skill Group/Level assignments, click here to access the Gear
Reduction. To request a Skill Group/Skill Level change, fill out this form.
Continued...
Bulletin Number: 05-98-26; Date: 06/02/26
Page 5 of 6
*IMPORTANT: Always note the original Calibration Identification number (CID) / ROMID the
vehicle came in with on the repair order before reprogramming and, make sure to list the NEW CID /
ROMID for any newly installed programming (as confirmed from the actual control module AFTER
installation). The NEW CID / ROMID MUST also be noted on the repair order as this information is
required for entry in the Claim Specific Detail field during claim submission. These numbers can be
read using SSM5-R.
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.
Bulletin Number: 05-98-26; Date: 06/02/26
Page 6 of 6
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TSB/Document ID: 05-98-26
Replacement Service Bulletin Number:
MFR Communication Date: 2026-06-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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