2020 Subaru Ascent Technical Service Bulletins

530 technical service bulletins (TSBs) are on record for the 2020 Subaru Ascent. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10182214Oct 13, 2020Tires, Electrical system. This Service Information Bulletin announces additional diagnostic procedures for TPMS related DTC C2921 on the applicable models listed.
• 10182212Oct 9, 2020Electrical system, Transmission and drivetrain. This bulletin announces availability of a new transmission harness for use when diagnosis of DTC P0842 determines the sensor itself is OK but the transmission wiring harness is NG.
• 10182176Oct 6, 2020Electrical system, Latches, locks and linkages, Body and structure. This bulletin replaces TSB 07-143-18R and announces additional changes made to the PRG control module.
• 10182187Oct 2, 2020Equipment. The purpose of this bulletin is to provide a desription of current changes to service manuals available via the Subaru Technical Information System (STIS) web site.
• 10180739Sep 22, 2020Electrical system. Update your STARLINK Multimedia Software and Navigation Maps.
• 10180738Sep 22, 2020Electrical system. Update for STARLINK Multimedia Software. (with 7-inch or 8-inch display)
• 10180730Sep 22, 2020Electrical system, Equipment. This bulletin announces availability of new Harman audio unit amplifier units with revised internal logic designed to optimized efficiency.
• 10180733Sep 18, 2020Equipment. This bulletin provides a description of current changes to Service Manuals.
• 10179429Aug 31, 2020Equipment, Electrical system. Map Data Update Procedure for Harman Gen 3.1 Navigation Equipped Head Unts (H/U).
• 10179426Aug 31, 2020Electrical system. This service information bulletin announces discontinuation of both the "Stitcher" app and the related News Radio feature from the STARLINK app lineup effective 12 midnight on Thursday, September 24, 2020.
• 10179423Aug 31, 2020Electrical system. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed.
• 10179409Aug 18, 2020Brakes. This bulletin announces availability of new front brake pad kit established to address concerns of a squeaking sound heard when stopping.
• 10179378Aug 4, 2020Equipment. Special Service Tools Cross Reference List.
• 10177833Jul 28, 2020Electrical system, Equipment. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models listed.
• 10177820Jul 17, 2020Electrical system. This Service information bulletin provides Telematics system/generation applicability.
• 10177826Jul 16, 2020Equipment, Electrical system. This Service Information Bulletin provides helpful procedures and best practices to utilize when customers present with concerns relating to the operation of their Gen 2 Telematics system equipped Subaru.
• 10177825Jul 16, 2020Electrical system, Forward collision avoidance. This document discusses some of the conditions that may trigger an Automatic Collision Notification (CAN) (Gen1) or Advanced Automatic Collision Notification (AACN) (Gen2), without a collision, airbag deployment, or accident taking place.
• 10177819Jul 14, 2020Electrical system. This Service Information bulletin provides IMPORTANT information regarding diagnosis and replacement (when applicable) of the STARLINK Telematics Data Communication Module (DMC).
• 10177818Jul 13, 2020Equipment, Electrical system. This bulletin contains inllustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10176029May 28, 2020Electrical system. This bulletin announces availability of a new 120V inverter assembly. The new inverter has been developed in response to a limited number of reports describing the overcurrent protection feature triggering at less than the 100W specification.
• 10176024May 19, 2020Seat belts. This service infromation bulletin provides an important precaution to follow whenever installing the front seat belt assembly retaining bolts located at the base of the "B" pillar.
• 10176017May 15, 2020Electrical system, Latches, locks and linkages, Body and structure. This bulletin announces a design change made to the PRG control module.
• 10175984May 6, 2020Equipment. Vehicle repair program for customers affected by the COVID-19 quarantine.
• 10175977May 5, 2020Equipment, Seats, Electrical system. This bulletin announces a design change made to the Slide Rail components of the left and right front power seat frame / track assemblies used on the models listed.
• 10174543Apr 30, 2020Equipment. All Models (Vehicle Cleaning- COVID-19Best Practices)
• 10174537Apr 30, 2020Equipment, Electrical system. This service information bulletin provides important information regarding diagnosis and replacement (when applicable) of the STARLINK Telematics Data Communication Module (DCM). All models with STARLINK Telematics System.
• 10174536Apr 30, 2020Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10174535Apr 17, 2020Electrical system. Subaru's QMR of the month winner.
• 10174512Apr 8, 2020Electrical system. This bulletin is designed to address an error code 202 and/or 204 when attempting to complete the STARLINK Telematics subscription process.
• 10174511Apr 6, 2020Latches, locks and linkages, Body and structure, Equipment. This bulletin announces a design change made to the front door weatherstrips to prevent interference with the leading edge of the rear doors under certain circumstances.
• 10174509Apr 2, 2020Electrical system, Transmission and drivetrain. This bulletin announces availability of a new transmission harness for use when diagnosis of DTC P0842 - TRANSMISSION FLUID PRESSURE SENSOR/ SWITCH "A" CIRCUIT LOW.
• 10173190Mar 26, 2020Electrical system, Equipment. This service bulletin announces the addition of diagnostics for DTC B224C: RADIO ANTENNA FAULTS to the service manuals of the models listed.
• 10173135Mar 20, 2020Electrical system, Body and structure, Latches, locks and linkages. This Service Information Bulletin provides insight on how to address a customer concern of the rear hatch, Power Rear Gate (PRG) or trunk release operating (or finding the PRG/trunk open unexpectedly after parking) without a specific input (button press) from the operator.
• 10173128Mar 19, 2020Equipment, Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure.
• 10173127Mar 19, 2020Electrical system, Air bags, Equipment. This bulletin provides information regarding Event Data Recorder (EDR) functionality which has been incorporated into the airbag system.
• 10173109Mar 4, 2020Body and structure, Equipment. This bulletin announces availability of new outer door handles to address isolated concerns of the chrome finish peeling.
• 10173027Mar 3, 2020Engine cooling, Equipment, Electrical system. The purpose of this bulletin is to provide a description of current changes to Service Manuals available via the Subaru Technical Information System (STIS) web site.
• 10171939Feb 21, 2020Equipment. This bulletin details an important regulation issued by the National Highway Traffic Safety Administration (NHTSA) which impacts the way some vehicles with accessories are sold. This regulation applies to any automobile retailer installing accessories on a vehicle prior to its first sale.
• 10171936Feb 21, 2020Electrical system, Equipment. This bulletin describes two operational concerns and the repair method for addressing them on the Harman Gen 3.1 Display Audio (Mid) and Navigation -equipped (High) head units.
• 10171932Feb 19, 2020Electrical system. The following information addresses reprogramming file availability and a software update installation procedure to provide optimization to the new Harman Gen 3.1 Audio and Navigation head units utilized in the models as listed.
• 10171927Feb 19, 2020Body and structure. This bulletin provides a repair procedure to address a small number of customer concerns of the hood panel surface vibrating while driving. This condition can result if the mastic (adhesive) used to bond the inner hood reinforcing panel to the outer panel (skin) begins to separate.
• 10171099Jan 30, 2020Engine cooling. This bulletin announces availability of a new vacuum hose assembly for the positive crankcase ventilation (PCV) system incorporating improved sealing to prevent potential oil seepage.
• 10171096Jan 28, 2020Equipment, Electrical system. This bulletin provides information on a new reprogramming procedure (FOTA) to optimize the Harman Gen 3.1 Audio and Navigation head units (H/U).
• 10171095Jan 28, 2020Electrical system, Equipment. The first TomTom map update for Gen 3.1 Harman navigation equipped vehicles was made available.
• 10171083Jan 28, 2020Equipment, Electrical system, Forward collision avoidance. This Service Information Bulletin describes how to proceed when doing EyeSight (Version 3) system diagnosis.
• 10171089Jan 17, 2020Equipment, Air bags, Electrical system. This Bulletin provides information regarding Event Data Recorder (EDR) functionality which has been incorporated into the airbag system.
• 10171078Jan 8, 2020Suspension, Equipment. This bulletin provides an inspection procedure to follow when addressing customer concerns of a rattling, knocking or klunk type sound when going over slight bumps and/or uneven road surfaces.
• 10169851Dec 30, 2019Equipment. Reprograming file availability for optimization of Harman Gen 3.1 Audio and Navigation Head Units.
• 10169825Dec 20, 2019Electrical system. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. The exchange program policy can also be found in Sections 8.4.9 and 11.2.10 of your Claims Policies and Procedures Manual found in Subarunet.
• 10169877Dec 13, 2019Engine, Electrical system. In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a Service Program to reprogram the Engine Control Module (ECM) on certain 2019-2020MY Ascent and 2020MY Legacy & Outback vehicles. In some vehicles, the current software may cause the sub learning value control to operate improperly during the wake-up mode of the ECM. This could cause repeated erroneous learning of the…

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