Accesstuner Support for Subaru

Accesstuner Pro is Windows compatible only. We do not support Mac OS at this time other than through the use of Apple Boot Camp. 
See the latest changes as well as a history of changes that have been implemented in Accesstuner software.

• Subaru Accesstuner Pro Release Notes
• Subaru Accesstuner Release Notes

Step-By-Step Accesstuner Update Instructions:

1. Open the Accesstuner software on your computer.
2. Click on Help in the menu bar.
3. Select Updates.
4. Select Check For Updates.
5. Select Get Updates.

Subaru Accesstuner
Comprehensive guides for operating the Accesstuner software.

• Accesstuner General Features
• /wiki/spaces/PRS/pages/478642258
• Accesstuner Tutorials: How to set default log save file
• Accesstuner: Map Comparison
• Pre-Tuning Guide
• Saving a map in Accesstuner Pro so anyone can view (Leave a map unlocked)

Subaru Tuning Guides
The Subaru tuning guides walk you through the Subaru tuning process.

• Subaru Accesstuner DIT Tuning Guide Supplement
• Subaru Accesstuner Tuning Guide
• Subaru Accesstuner FA24DIT Ascent Tuning Supplement
• Subaru Accesstuner 2022+ 2.4L DIT Tuning Guide Supplement

Subaru COBB Custom Features
The COBB Custom Features document set is a comprehensive guide that walks you through the various custom feature setup and tuning process.

• Subaru Custom Monitor List
• Subaru Custom Sensor Logging
• Subaru Differential Fuel Pressure Compensation
• NexGen Flex Fuel DTC Troubleshooting
• Subaru Fuel Mileage Display Correction
• Subaru Per Gear Boost Compensation
• Subaru Speed Density Guide: 2.0, 2.5L, DIT
• Subaru DIT V4.0 CCF (Gen2) Additions
• Subaru EJ 2.0L (02-05 WRX MT) CCF Additions
• Launch Control and Flat-Foot Shift for Subaru FAQ
• NEXGEN Flex Fuel How to Update Maps
• NEXGEN Flex Fuel Software Changes and Updates
• Subaru Gateway Flex Fuel DTC Troubleshooting
• Subaru NexGen Flex Fuel Tuning Guide
• Subaru VA/VB DIT WRX CAN Flex Fuel Tuning Guide

Subaru Accesstuner Tech Bulletins
The Tech Bulletins outline key technical topics of interest for tuners.

• DIT Recall FAQ for Protuners
• Tech Bulletin - 02-05 WRX (SD ECU Type) - Wall Wetting Calibration Improvement
• Tech Bulletin - 2017 WRX STI - Subaru Logic and OTS Calibration Changes
• Tech Bulletin - 2018 WRX STI - Subaru Logic and OTS Calibration Changes
• Tech Bulletin - DIT Subaru - Fuel "Lean Limit" tables causing unexpected fueling behavior
• Tech Bulletin - Subaru - Wastegate Frequency & Behavior
• Tech Bulletin - Targeting High Boost Levels
• Tech Bulletin – Unexpected Ignition Timing Correction (2.5L Turbo Subaru)
• Tech Bulletin - COBB / Injector Dynamics "1300cc" Injectors
• Tech Bulletin - AVCS Activation Improvement
• Tech Bulletin - Fuel Pump Duty Post-Start High Level Activation (Max. Engine Run Time)
• VA DIT Logging Update
• 2022 ADM/USDM VB WRX Added Flash Recovery Improvements
• Tech Bulletin - VB SOI Changes

Subaru Accesstuner Table and Monitor List
The Subaru table and monitor lists include help descriptions for all factory tables and monitors available in the Subaru software.

• Subaru Monitor List
• Subaru Table List
  
  

Subaru Accesstuner Calibration Data and Spreadsheets

• AccessTUNER Calibration & Tuning Guide Worksheet for Subarus v2.07.xlsx
• Fuel Injector Data: Subaru

Text Tutorials:

• Instructions for Downloading and Installing Maps
• Instructions for Dumping an Unrecognized ROM
• Dynamic Advance & Dynamic Advance Multiplier Explained
• How Subaru’s Factory Boost Control System Works
• How To Break-In Your New Subaru Engine
• Data Logging Instructions