TCM Reprogramming File Availability to Address Inconsistent Shifting / Slipping Concerns When Cold – 2015-2016 Subaru WRX

NUMBER: 16-98-16
DATE: 02/05/16

APPLICABILITY:	2015-2016MY WRX Models
SUBJECT:	TCM Reprogramming File Availability to Address Inconsistent Shifting / Slipping Concerns When Cold

 

INTRODUCTION

This bulletin announces availability of reprogramming files for optimization of the transmission control module (TCM).  The new logic addresses customer concerns of inconsistent shifting characteristics and / or a “slipping” -type sensation which may be experienced under moderate acceleration after a cold start before the CVT is up to operating temperature.

 

PRODUCTION CHANGE INFORMATION:

The new TCM logic was incorporated into production starting with VIN G*825251.

PACK FILE APPLICABILITY

MODEL	MODEL YEAR	PAK FILE NAME	NEW TCM PART NUMBER	OLD TCM PART NUMBERS	DECRYPTION KEYWORD	NEW CID NUMBER
WRX 2.0L DIT	2015	30919AD792.pak	30919AD792	30919AD790 30919AD791	97ABDBFA	L9FDD081
	2016	30919AE551.pak	30919AE551	30919AE550	11D4093E	K1FDD080

 

SERVICE PROCEDURE / INFORMATION

Step 1:

Reprogram the TCM using the SSMIV following the normal FlashWrite procedure.

NOTES:

SOA now highly recommends connecting the Midtronics GR8 Diagnostic Battery Charger to the vehicle and utilizing the Power Supply Mode feature anytime a vehicle control module is being reprogrammed. Once the GR8 is connected to the vehicle, as long as the battery is fully charged, it takes less than 3 minutes to boot-up the charger, select the Power Supply Mode, and have the battery voltage stabilized and ready for reprogramming.

VERY IMPORTANT: This information is applicable to the Midtronics GR8 Diagnostic Battery Charger ONLY. It does not apply to any other brand / type of “generic” battery charger

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whatsoever.  ONLY the GR8 and its Power Supply Mode feature has been tested and approved by Subaru of America, Inc. (SOA).

• If the GR8 indicates the vehicle’s battery must be charged, charge the battery using the GR8 before proceeding to reprogram the vehicle while using the Power Supply Mode.
• Control module failures as a result of 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.

Step 2:

Using the SSMIV, clear the AT Learning Data using the following procedure:

• Start > Diagnosis > Vehicle Selection > Each System > Transmission > Work Support > Clear AT Learning Data.
• Click “YES” and when “Execute Clear AT Learning” is displayed, click “YES” again.
• Turn the ignition OFF, wait at LEAST 30 seconds then turn the ignition back ON. At this point, the AT Temp light will start blinking; 4 times in 2 seconds to signify the Clear AT Learning procedure has completed successfully.  If the AT Temp light does not flash as described, repeat Step 2 again from the beginning.

 

Step 3:

Using the SSMIV, perform the AT Learning Control following the procedure outlined in the applicable Service Manual.

 

WARRANTY / CLAIM INFORMATION

For vehicles within the Basic New Car Limited or Powertrain Warranty period or covered by a Subaru Added Security Powertrain, Classic or Gold plan, this repair may be submitted using the following claim information:

LABOR DESCRIPTION	LABOR OPERATION #	FAIL CODE	LABOR TIME
TCM Reprogramming, Clear AT Learning and Perform Learning Control	A860-732	MJZ-48	0.7

 

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.

 

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J2534 Reprogramming

Subaru reprogramming files using a generic (non-OEM) SAEJ2534 pass-thru vehicle programming device

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are available by contacting Service Technical Information Company toll free at 1-866-428-2278. The cost for the CD-ROM with all reprogramming files is $75.00 plus S/H and applicable state tax. Files will be updated four (4) times per year, in CD-ROM format, with all available reprogramming service information at the same above offered cost. Authorized Subaru Dealers are provided the same reprogramming information.

Before purchasing, the reprogramming details can be found in the following Reprogramming J-2534 Files chart. Click the link to view the PDF chart.

Subaru J2534 Reprogramming software meets the latest available J2534-1 specification. Our Reprogramming J2534 Files chart does not specify the Calibration Identification Number (CID); however, this information is included in our offered CD-Rom.

Note: The ECM or TCM being reprogrammed may already contain some or all of the reprogramming files listed in the Reprogramming J2534 Files chart shown by release date. It is possible to damage the vehicles ECM/TCM during the reprogramming event. Once the reprogramming process has started, it is recommended not to interrupt the process until the event is completed. If you experience any problems, please contact your scan tool maker for further instructions.

Are all pre-2004MY Subaru vehicles compatible with J2534?

No. Subaru has no reprogramming capability for model years 1996-1998. Starting with our 1999 model year, please see our Reprogramming Pre-J2534 Files chart for affected model reprogramming information.

Both pre-J2534 reprogramming and J2534 pass thru reprogramming files are included in the offered HDS kit software for aftermarket service provider application.

techinfo.subaru.com

 

Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API

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Last update on 2026-06-13 / Affiliate links / Images from Amazon Product Advertising API

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Last update on 2026-06-13 / Affiliate links / Images from Amazon Product Advertising API

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