NHTSA ID Number: 10238463
Manufacturer Communication Number: 09-102-23
TSB/Document Date: 2023-07-03
Summary
This bulletin announces the diagnostic procedures and availability of reprogramming files to rectify DTCs P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) and P2109 (Throttle/Pedal Position Sensor “A†Minimum Stop Performance).
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:
2022MY WRX
NUMBER: 09-102-23
DATE: 06/28/23
SUBJECT: Diagnosis Procedures for DTCs
P2404 & P2109
INTRODUCTION:
This bulletin announces the diagnostic procedures and availability of reprogramming files to rectify
DTCs P2404 (Evap System Leak Detection Pump Sense Circuit Range/Performance) and P2109
(Throttle/Pedal Position Sensor “A” Minimum Stop Performance). P2404 is caused by the internal
pump of the Evaporate Leak Check Module (ELCM) being temporarily stuck/seized. P2109 is cause
by the throttle body becoming frozen in the closed position. If these DTCs are found stored within the
ECM, follow the procedures outlined in this bulletin.
PRODUCTION CHANGE INFORMATION:
These new files have been incorporated into vehicle production as per the table below.
Model
Starting VIN
N8029088
MT
N9029081
WRX
PAK FILE APPLICABILITY:
MY
Model
Trans
CVT
22
File Description
Old ECM Part #
Decryption
Keyword
New CID #
22765AR885.pk2
22765AR880
22765AR881
22765AR882
22765AR883
22765AR884
1D2C307A
LHBHB10C00G
22765AR895.pk2
22765AR890
22765AR891
22765AR892
22765AR893
22765AR894
944297E3
LHBHB10B00G
WRX
MT
These reprogramming files have been included in the January 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: 09-102-23; Date: 06/28/23
Page 1 of 9
SERVICE PROCEDURE FLOWCHART:
Perform reprogramming outlined in STEP 9.
Perform diagnosis following the
applicable Service Manual. Once
repaired, perform the reprogramming
procedure outlined in STEP 9.
Continued...
Bulletin Number: 09-102-23; Date: 06/28/23
Page 2 of 9
Continued...
Bulletin Number: 09-102-23; Date: 06/28/23
Page 3 of 9
Contact Subaru Techline with ability to
provide SSM data and the testing results
attained using this bulletin.
SERVICE PROCEDURE / INFORMATION:
STEP 1: Using Subaru Select Monitor (SSM), check for diagnostic trouble codes P2404 & P2109.
Use the table below to confirm the next course of action. Always save SSM data and record the
results of the following tests.
DTC Results
Next STEP
P2109
Proceed to STEP 9
P2404
P2404 & P2109
Proceed to STEP 2
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 following the applicable Service Manual. Once repaired,
perform the reprogramming procedure outlined in STEP 9.
Continued...
Bulletin Number: 09-102-23; Date: 06/28/23
Page 4 of 9
STEP 3: CAREFULLY disconnect the ELCM drain tube. Inspect for signs of water or oil.
Have signs of water or oil been detected within the ELCM drain tube?
YES – Clean and dry the drain tube using a non-alcohol base cleaner. Proceed to STEP 4.
NO – Proceed to STEP 4.
STEP 4: Connect the vehicle to a recommended power supply. See APPENDIX A for addition
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.
Continued...
Bulletin Number: 09-102-23; Date: 06/28/23
Page 5 of 9
Is DTC P2404 stored within the ECM?
NO – Proceed to STEP 5.
YES – Proceed to STEP 6.
STEP 5: Was the vacuum value result observed in STEP 4 found to be lower than -0.26 PSI?
YES – Proceed to STEP 9.
NO – Repeat STEP 4 one time then proceed to STEP 7.
STEP 6: Using SSM, perform the ELCM Pump Active Test for a period of 35 minutes or more. See
APPENDIX A for addition 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 4. 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 7: 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 9.
NO – Proceed to STEP 8.
STEP 8: Replace the Evaporate Leak Check Module and repeat the Evaporative System Leak Test
outlined in STEP 4. Check the DTCs and the vacuum value results.
Is DTC P2404 stored within the ECM?
NO – Proceed to STEP 9.
YES – Contact Subaru Techline with ability to provide SSM data and the testing results
attained using this bulletin.
Continued...
Bulletin Number: 09-102-23; Date: 06/28/23
Page 6 of 9
STEP 9: Reprogram the ECM following the normal FlashWrite procedure. See APPENDIX A for
addition information regarding power supply.
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
LEAK CHECK MODULE R&R AND ECM REPROGRAMMING
A455-244
1.9H
Fail Code
UPG-48
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
Miscellaneous Detail 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: 09-102-23; Date: 06/28/23
Page 7 of 9
APPENDIX A
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 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: 09-102-23; Date: 06/28/23
Page 8 of 9
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: 09-102-23; Date: 06/28/23
Page 9 of 9
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TSB/Document ID: 09-102-23
Replacement Service Bulletin Number:
MFR Communication Date: 2023-06-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY
MFR Component System:
MFR Component Subsystem:
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