DTC B1572- Revised Immobilizer Antenna Diagnostics – 2017-2019 Subaru Legacy & Outback

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Bulletin Number: 07-181-20; Date: 10/16/20 Page 1 of 2 Continued… 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. NUMBER: 07-181-20 DATE: 10/16/20 APPLICABILITY: 2017-19MY Legacy and Outback SUBJECT: DTC B1572- Revised Immobilizer Antenna Diagnostics INTRODUCTION: This Service Information Bulletin provides an important step currently missing from the Service Manual diagnostics for DTC B1572 “IMM CIRCUIT EXCEPT ANTENNA CIRCUIT”. The applicable Service Manuals will be updated with this important information. SERVICE PROCEDURE / INFORMATION: REMINDER: Customer satisfaction and retention starts with performing quality repairs. When an error occurs during communication between the engine ECM and Immobilizer Unit, DTC B1572 is recorded in the Engine ECM. When this occurs, it is CRITICAL to check for any stored DTCs in the Immobilizer system and perform the diagnostics for those stored DTCs BEFORE starting B1572 diagnosis. This very important DTC inspection step is currently missing in the Service Manual. As a result, unnecessary parts replacement may occur. Both the NEW and OLD (current, for reference) Service Manual descriptions are supplied below. IMPORTANT NOTES: • This change is applicable in the LEGACY/OUTBACK Service Manual, section: IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1572 only. • This change is NOT APPLICABLE to section “KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1572”. 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: 07-181-20; Date: 10/16/20 Page 2 of 2 OK NG 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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