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

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

SERVICE BULLETIN
APPLICABILITY:
SUBJECT:

2023-24MY Legacy & Outback 2.4L

NUMBER: 16-145-23R

DTC P2797 / Reprogramming Files

DATE:

12/04/23

REVISED:

08/28/24

INTRODUCTION:
This bulletin announces availability of new reprogramming files for the Transmission Control
Module (TCM) developed to address cases of DTC P2797 (Electrical/Auxiliary Transmission Fluid
Pump “A” Performance/Stuck Off”). A shock or surge can also be felt during engine restart when
auto start-stop activates. This condition is caused by engine torque not being transferred correctly by
the forward clutch system during engine restart resulting in a false detection of a transmission fluid
pump failure. The new files contain enhanced logic optimizing forward clutch engagement. If DTC
P2797 found, perform the reprogramming procedure outlined below.
PFC FILE APPLICABILITY:
MY

2023

2024

Model

File Description

Specification

Old Part #

New CID #

Legacy

30919AJ70C.pfc

2.4L Turbo,
CVT

30919AJ70B

Z1FEC63100L

Outback

30919AJ71C.pfc

2.4L Turbo,
CVT

30919AJ71B

Z1FEF63100L

Outback Wilderness

30919AJ72C.pfc

2.4L Turbo,
CVT

30919AJ72B

Z18EF63100L

Legacy

30919AK09C.pfc

2.4L Turbo,
CVT

30919AK09A
30919AK09B

A917550172L

Outback

30919AK10C.pfc

2.4L Turbo,
CVT

30919AK10A
30919AK10B

A917770172L

Outback Wilderness

30919AK11C.pfc

2.4L Turbo,
CVT

30919AK11A
30919AK11B

A917772172L

NOTE: There is no need to perform CVT Learning after reprogramming.
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: 16-145-23R; Revised: 08/28/24

Page 1 of 6

2023MY SERVICE PROCEDURE / INFORMATION:
Refer to the battery charging information outlined in the APPENDIX A section of this bulletin.
Reprogram the TCM following the normal SSM5-R procedure. Detailed information regarding the
SSM5-R reprograming procedures can be found in TSB 14-28-21R.
2024MY SERVICE PROCEDURE / INFORMATION:
The information below has been taken from the Service Manual regarding DTC P2797 diagnosis. The
additional procedures have been outlined in RED.

NEW SERVICE MANUAL WORK INSTRUCTIONS

Continued...
Bulletin Number: 16-145-23R; Revised: 08/28/24

Page 2 of 6

ROAD TESTING WITH AUTO START STOP:
1. Connect the vehicle to Subaru Select Monitor.
2. Turn the ignition switch to “ON.” (Engine OFF)
3. Display the “ATF Temp” and the “Emphasized idle stop request” data monitors.
4. Start the engine.
5. Allow the ATF Temperature to reach 140°F (60°C).
NOTE: 140°F -194° (60°c-90°) is the preferred road testing range.
6. Confirm the “Emphasized idle stop request” data monitor reads “Permit.”
NOTE: If the “Emphasized idle stop request” data monitor reads “Prohibit,” follow the
procedures below.
•

Confirm there are no DTCs.

•

Confirm the ATF Oil Temp & AWD warnings are not indicated.

•

Using SSM, confirm the Electric oil pump relay is “ON,” the status is “Normal,”
and Electric oil pump command duty is 5-15%.
Continued...

Bulletin Number: 16-145-23R; Revised: 08/28/24

Page 3 of 6

7. Turn off all system causing an electrical load, such as headlamps, A/C seat heater, defrost,
etc.
8. Shift the gear selector to the “D” range.
9. Check for any “Excessive Shock” when the engine is restarted from the Auto Start Stop
system.
a) Allow the Auto Start Stop system to turn off the engine for five seconds.
b) Release the brake pedal and allow the vehicle to move forward for two seconds or more.
Confirm there is no “Excessive Shock” felt.
c) Stop the vehicle and repeat the a-b process four more times.
d) If an “Excessive Shock” is felt, repeat the a-b process twenty more times to confirm if the
condition continues.
TRANSMISSION CONTROL MODULE REPLACEMENT (IF REQUIRED):
The proceedures below are ONLY to be followed if an unscuccessfull reprograming attempt has
been previously performed or prompted to by SSM-R.
The service procedures for transmission control module replacement remain unchanged. Always refer
to the applicable Service Manual and review the full requirements of the repair being performed.
The Service Manual procedures contain information critical to performing an effective repair the
first time, every time. This includes but is not limited to important SAFETY precautions, proper
inspection criteria, necessary special tools, required processes and related one-time-use parts needed
for a complete and lasting repair. Refer to STIS: Transmission/Transaxle > Transmission Control
Module (TCM)
IMPORTANT NOTES:
•

Whenever reconnecting the ground cable terminal to the battery sensor, torque to 7.5Nm
(5.5ft.-lbs. or 66inch-lbs.) while supporting the sensor with the other hand as outlined in the
applicable Service Manual under: STARTING/CHARGING SYSTSEMS > Battery Sensor.

•

When the TCM is replaced, the new module will require registration and “AT clearing/
learning” procedure performed.

•

When the TCM is replaced on vehicle equipped with the Auto Start Stop function, the “Start
count reading ECU to SSM” procedure will require performing.

PART INFORMATION:
REMINDER: Always order the most up-to-date replacement parts based on the specific VIN being
repaired.
Part Description

UNIT-AT CONTROL

MY

Model

Part Number

2024

Legacy

30919AK09D

2024

Outback

30919AK10D

2024

Outback Wilderness

30919AK11D

Continued...
Bulletin Number: 16-145-23R; Revised: 08/28/24

Page 4 of 6

WARRANTY / CLAIM INFORMATION:
There have been no changes made to the Labor Time Guide regarding these procedures.
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 Miscellaneous Detail field during claim submission. These numbers can be
read using SSM5-R.
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.
Technicians can confirm if a later version is available by entering the CID listed in this bulletin into
SSM5-R. If a newer CID 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: 16-145-23R; Revised: 08/28/24

Page 5 of 6

APPENDIX A
BATTERY CHARGING INFORMATION:
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.

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.

Bulletin Number: 16-145-23R; Revised: 08/28/24

Page 6 of 6