NHTSA ID Number: 10240115
Manufacturer Communication Number: 09-108-23
TSB/Document Date: 2023-08-02
Summary
This bulletin announces diagnostic procedures and availability of new Engine Control Module (ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) detection.
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TSB/Document ID: 09-108-23
Replacement Service Bulletin Number:
MFR Communication Date: 2023-07-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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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:
2020-23MY Legacy & Outback 2.4L
2023MY Legacy & Outback 2.5L
NUMBER: 09-108-23
DATE: 07/18/23
DTC P2404 / Reprogramming Files SB23-038
INTRODUCTION:
This bulletin the announces diagnostic procedures and availability of new Engine Control Module
(ECM) reprogramming files to address DTC P2404 (Evap System Leak Detection Pump Sense
Circuit Range/Performance) detection. In rare cases, the internal pump for the Evaporative Leak
Check Module (ELCM) system can seize temporarily. The new files contain enhanced logic to
prevent the ELCM pump from seizing. If P2404 is found in the fault memory, follow the procedures
outlined below.
PAK FILE APPLICABILITY:
Model
MY
File Name
Old Part Number
Decryption Keyword
New CID #
22765AM977.pk2
22765AM970
22765AM971
22765AM972
22765AM973
22765AM974
22765AM975
22765AM976
954775AC
LG7D900B00G
21
22765AR245.pk2
22765AR240
22765AR241
22765AR242
22765AR243
22765AR244
004FF36F
LG7F600F00G
22
22765AR933.pk2
22765AR930
22765AR931
22765AR932
B11BCE83
LG7G500G00G
22
22765AR253.pk2
22765AR250
22765AR251
22765AR252
0B2A5DBD
LG7G500H00G
20
Legacy &
Outback 2.4L
Outback
Wilderness
2.4L
These reprogramming files have been included in the April 2023 SSM software update.
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: 09-108-23; Date: 07/18/23
Page 1 of 11
PFC FILE INFORMATION:
MY
Specification
Model
File Name
Old Part Number
New CID #
Legacy & Outback
22765AS462.pfc
22765AS460
22765AS461
LHBK240G00G
Outback Wilderness
22765AS472.pfc
22765AS470
22765AS471
LHBK240H00G
Legacy
22765AS49C.pfc
22765AS49A
22765AS49B
XE1W400m00G
Outback
22765AS50C.pfc
22765AS50A
22765AS50B
XE1W400n00G
Legacy
22765AT70B.pfc
22765AT70A
XE1W400L00G
Outback
22765AT71B.pfc
22765AT71A
XE1W400J00G
2.4L
2023
2.5L
2024
2.5L
Detailed information regarding the SSM5-R reprogramming procedures can be found in TSB 14-2821.
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 2 of 11
SERVICE PROCEDURE FLOWCHART:
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 3 of 11
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 4 of 11
SERVICE PROCEDURE / INFORMATION:
STEP 1: Using Subaru Select Monitor (SSM), check for diagnostic trouble codes. Confirm P2404 is
stored and proceed to the next step.
NOTE: Always save SSM data and record the results of the following tests.
STEP 2: Are any of the diagnostic trouble codes listed below also stored withing the ECM?
•
P2419 - Evap System Switching Valve Control Circuit Low
•
P2420 - Evap System Switching Valve Control Circuit High
•
P2401 - Evap System Leak Detection Pump Control Circuit Low
•
P2402 - Evap System Leak Detection Pump Control Circuit High
•
P24BA - Evap System Leak Detection Pump Pressure Sensor Circuit Low
•
P24BB - Evap System Leak Detection Pump Pressure Sensor Circuit High
•
P24B9 - Evap System Leak Detection Pump Pressure Sensor Circuit Range/Performance
NO – Proceed to STEP 3.
YES – Perform diagnosis of the DTC(s) following the procedures outlined in the
applicable Service Manual.
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 5 of 11
STEP 3: Refer to the applicable Service Manual and review: General Description > Repair Contents
> Action required before & after Battery Disconnect. Additionally, record any stored seat position(s)
before proceeding. Relearn any seat position memory after work is complete. If the power rear gate
(PRG) height has been customized, that position must also be noted and relearned. CAREFULLY
disconnect the ground terminal from the battery sensor.
STEP 4: CAREFULLY Raise the vehicle and locate the ELCM located behind the fuel tank.
STEP 5: CAREFULLY disconnect the ELCM drain tube. Inspect for signs of water or oil.
Have signs of water or oil been detected withing the ELCM drain tube?
YES – Clean and dry the drain tube using a non-alcohol base cleaner. Proceed to STEP 6.
NO – Proceed to STEP 6.
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 6 of 11
STEP 6: Connect the vehicle to a recommended power supply. See APPENDIX A for additional
information regarding power supply. Using SSM, perform the Evaporative System Leak Test. Collect
and save all data.
Once the evaporative system leak test is complete, check the DTCs and examine the vacuum value
results. Record the value shown in the row labeled MID: $3C, TID: $C4, and Scaling ID: $FE. This
value should be lower than -0.26 PSI.
Is DTC P2404 stored within the ECM?
NO – Proceed to STEP 7.
YES – Proceed to STEP 8.
STEP 7: Was the vacuum value result observed in STEP 6 found to be lower than -0.26 PSI?
YES – Proceed to STEP 11.
NO – Repeat the Evaporative System Leak Test (outlined in Step 6) then proceed to STEP 9.
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 7 of 11
STEP 8: Using SSM, perform the ELCM Pump Active Test for a period of 35 minutes or more. See
APPENDIX A for additional information regarding power supply.
Once the ELCM Pump Active Test has been performed for a period of 35 minutes or more, repeat the
Evaporative System Leak Test outlined in STEP 6. Check the DTCs and the vacuum value results.
Is DTC P2404 stored within the ECM?
NO – Proceed to STEP 7.
YES – Proceed to STEP 8.
STEP 9: Was the vacuum value result observed during the second Evaporative System Leak Test
found to be lower than -0.26 PSI?
YES – Proceed to STEP 11.
NO – Proceed to STEP 10.
STEP 10: Replace the Evaporate Leak Check Module and repeat the Evaporative System Leak Test
outlined in STEP 6. Check the DTCs and the vacuum value results.
Is DTC P2404 stored within the ECM?
NO – Proceed to STEP 11.
YES – Contact Subaru Techline with ability to provide SSM data and the testing results
attained using this bulletin.
STEP 11: Reprogram the ECM following the normal FlashWrite procedure. See APPENDIX A for
addition information regarding power supply.
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 8 of 11
WARRANTY / CLAIM INFORMATION:
For vehicles within the Basic New Car Limited, an applicable Emission Warranty period or covered
by an active Subaru Added Security Classic or Gold plan, this repair may be submitted using the
following claim information:
Labor Description
Labor Operation #
Labor Time
ECM REPROGRAMMING & DRAIN TUBE CLEAN / EVAP TESTING
A455-223
1.0H
Fail Code
UPG-48
LEAK CHECK MODULE R&R AND ECM REPROGRAMMING
A455-244
1.9H
IMPORTANT: Always note the original Calibration Identification number (CID) the vehicle came in
with on the repair order before reprogramming and, make sure to list the NEW CID for any newlyinstalled programming (as confirmed from the actual control module AFTER installation). The NEW
CID MUST also be noted on the repair order as this information is required for entry in the claim
specific data field during claim submission.
NOTE: The PAK 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 listed in this bulletin into
FlashWrite. If a newer CID is shown as available in FlashWrite, 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: 09-108-23; Date: 07/18/23
Page 9 of 11
APPENDIX A
Subaru of America, Inc. (SOA) highly recommends connecting either the Subaru Midtronics
DCA8000 Dynamic Diagnostic Charging System or the Subaru Midtronics GR8-1100 Diagnostic
Battery Charger to the vehicle in 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 will take 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 FlashWrite 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.
Continued...
Bulletin Number: 09-108-23; Date: 07/18/23
Page 10 of 11
VERY IMPORTANT:
This information is applicable to the Subaru Midtronics DCA-8000 Dynamic Diagnostic Charging
System and the Subaru Midtronics GR8-1100 Diagnostic Battery Charger ONLY. It does not apply to
any other brand / type of “generic” battery charger whatsoever. ONLY the DCA-8000 and the GR81100 and their Power Supply Mode feature have been tested and approved by SOA.
Bulletin Number: 09-108-23; Date: 07/18/23
Page 11 of 11
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