DTCs C1531 and C1741- VDC Control Module Reprogramming – 2015-2018 Subaru Legacy & Outback 2016-2018 WRX

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Bulletin Number: 06-77-20R; Revised: 08/12/20 Page 1 of 3 Continued… NUMBER: 06-77-20R DATE: 06/02/20 REVISED: 08/12/20 APPLICABILITY: 2015-18MY Legacy and Outback 2016-18MY WRX SUBJECT: DTCs C1531 and C1741- VDC Control Module 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. INTRODUCTION: This bulletin announces the availability of reprogramming files to optimize the control module for the Vehicle Dynamics Control system (VDCCM). DTCs C1531 and / or C1741 may set, the Hill Holder warning lamp and cancellation alarm may activate and / or the VDC warning lamp can illuminate under the following conditions: • If slight pressure continues to be applied to the brake pedal after releasing the Electric Parking Brake (EPB), the VDCCM judges the scenario as a malfunction and sets DTC C1531. • If slight pressure continues to be applied to the brake pedal but not enough to activate the stop lamps, the VDCCM judges the scenario as a malfunction and sets DTC C1741. • When battery voltage drops below a specified threshold, the VDCCM judges the condition as a power supply irregularity when the engine is started, blinks the Hill Holder indicator lamp and sounds the cancellation alarm alerting the driver that the system is inoperative. PACK FILE APPLICABILITY: NOTE: These reprogramming files have been included in the April 2020 SSM Update. Model PAK File Name Old VDCCM Part Number Decryption Keyword 2015MY Legacy / Outback w/o EyeSight 27596AL002_00D.pak 27596AL00A, B & C FFD9C878 2015MY Legacy / Outback w/ EyeSight 27596AL014_01E.pak 27596AL01A, B , C & D DCA74AF8 2016MY Legacy / Outback w/o EyeSight 27596AL021_02B.pak 27596AL02A 74C8A819 2016MY Legacy / Outback w/ EyeSight 27596AL033_03D.pak 27596AL03A, B & C 6725753E 2017MY Legacy / Outback w/o EyeSight 27596AL041_04B.pak 27596AL04A C248432E 2017MY Legacy / Outback w/ EyeSight 27596AL052_05C.pak 27596AL05A & B 715A6803 2018MY Legacy / Outback w/o EyeSight 27596AL061_06B.pak 27596AL06A 8A076A4A 2018MY Legacy / Outback w/ EyeSight 27596AL071_07B.pak 27596AL07A E220E1CE 2016MY WRX w/ CVT and EPB 27596VA034_VER1.pak2 27596VA030, 31, 32, & 33 421EDEC3 2017MY WRX w/ CVT and EPB 27596VA074_VER1.pak2 27596VA070, 71, 72, & 73 DAD5052B 2018MY WRX w/ CVT and EPB 27596VB102.pak2 27596VB100 & 101 94859063 These Files Are Temporarily Unavailable SERVICE BULLETIN ATTENTION: GENERAL MANAGER q PARTS MANAGER q CLAIMS PERSONNEL q SERVICE MANAGER q IMPORTANT – All Service Personnel Should Read and Initial in the boxes provided, right. ©2020 Subaru of America, Inc. All rights reserved. Bulletin Number: 06-77-20R; Revised: 08/12/20 Page 2 of 3 Continued… SERVICE PROCEDURE: REMINDER: Customer satisfaction and retention starts with performing quality repairs. • Reprogram the VDCCM following the normal FlashWrite procedure. Subaru of America, Inc. (SOA) highly recommends connecting either the Subaru Midtronics DCA- 8000 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 (Flooded, EFB, 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 SDI 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 SDI 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 14V 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. 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 GR8-1100 and their Power Supply Mode feature have been tested and approved by SOA. 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: 06-77-20R; Revised: 08/12/20 Page 3 of 3 WARRANTY / CLAIM INFORMATION: For vehicles within the Basic New Car Limited warranty or an active Subaru Added Security Classic or Gold plan, this repair may be submitted using the following claim information: Labor Description Labor Operation # Fail Code Labor Time VDCCM Reprogramming A567-318 FCR-48 0.4 IMPORTANT: Always note the new Decryption Keyword on the repair order for any newly installed programming 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.

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