# Service bulletin 15\-305\-22R

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10243364
- Published by NHTSA: 2023\-10\-02
- Manufacturer's number: 15\-305\-22R
- Manufacturer's date: 2023\-09\-05
- NHTSA component: EQUIPMENT; ELECTRICAL SYSTEM

## NHTSA's summary

The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243364-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243364-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Equipment and accessories

## Vehicles listed

- 2023 SUBARU ASCENT
- 2023 SUBARU LEGACY
- 2023 SUBARU OUTBACK

## Recalls for the same vehicles and component

- [26V436000](/recalls/nhtsa/26V436000.md), 2026-07-07: EQUIPMENT:OTHER:LABELS
- [2023607](/recalls/tc/2023607.md), 2023-11-09: Electrical

## Other bulletins for the same vehicles and component

- [09\-141\-26](/bulletins/11037946.md), 2026-10-05, Service bulletin: ENGINE; ELECTRICAL SYSTEM. This Bulletin provides a diagnostic procedure for customer concerns about hesitation, reduced acceleration, or lack of power when driving uphill or under heavy engine load.
- [07\-244\-26](/bulletins/11037945.md), 2026-10-05, Service bulletin: ELECTRICAL SYSTEM. This Bulletin provides a repair procedure for increased dark current and unintended battery discharge that occurs in a small number of unique cases.
- [SubaruNet Announcement \(M](/bulletins/11037943.md), 2026-10-05, Other: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This announcement provides information on a new software update for the Midtronics Dss and DCA machines.
- [SubaruNet Announcement \(T](/bulletins/11037942.md), 2026-10-05, Other: POWER TRAIN; ELECTRICAL SYSTEM. This announcement provides information on an enhancement of the TechShare CVT diagnostic assitance application.
- [18\-244\-26](/bulletins/11037938.md), 2026-10-05, Service bulletin: ELECTRICAL SYSTEM. "This Bulletin announces additional troubleshooting steps for the following DTCs: DTC C1956: RH Actuator Circuit DTC C1957: LH Actuator Circuit"
- [15\-333\-25R](/bulletins/11037929.md), 2026-10-05, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This bulletin contains illustrations of exchange components and their manufacturer as well as a description of the proper exchange procedure. This is an revised version of the original bulletin.
- [15\-304\-22R](/bulletins/11037927.md), 2026-10-05, Service bulletin: ELECTRICAL SYSTEM. This bulletin has been developed to outline the steps for gathering basic but essential information during diagnosis of Infotainment concerns. This is an revised version of the original bulletin.
- [12\-258\-25R](/bulletins/11037925.md), 2026-10-05, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This bulletin provides additional examples, diagnostics tips and installation tips as helpful aids to be used when working with sunroof seals and sunroof frame assemblies on Ascent models. This is an revised version of the original bulletin.
- [15\-308\-23R](/bulletins/11036807.md), 2026-09-03, Service bulletin: ELECTRICAL SYSTEM. This Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw \(dark/standby current\) in vehicles experiencing battery drain when the ignition is off, leading to no\-start conditions or frequent jump\-starts.This is an revised version of the original bulletin.
- [SubaruNet Announcement \(C](/bulletins/11036804.md), 2026-09-03, Other: ELECTRICAL SYSTEM; POWER TRAIN. This Announcement provides diagnostic assistance for CVT issues.

JSON: [/v1/bulletins/10243364](/v1/bulletins/10243364)

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