Subaru Factory Monitor Descriptions For Accesstuner And V3 Accessport

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November 2022

Introduction

This document provides descriptions of each of the data monitors available to view and log in the current Accesstuner software and V3 Accessport firmware. Not all monitors are available for all vehicles due to differences in vehicle hardware and/or engine control unit (ECU) capabilities. Some monitors are only available in the latest ECU version (strategy) for a given vehicle.

For help with monitors specific to the COBB Custom Features, please see the separate COBB custom monitor guide.

Glossary of Acronyms

• • A/F = Air/Fuel
    
    
  • AT = Automatic Transmission
    
    
  • AVCS = Subaru's Active Valve Control System (i.e. variable valve timing)
    
    
  • CL = Closed Loop fueling
    
    
  • CVT = Continuously Variable Transmission
    
    
  • DAM = Dynamic Advance Multiplier
    
    
  • DIT = Subaru's "Direct Injection Turbo" motor (14-18 FXT, 15+ WRX, 19+ Ascent)
    
    
  • EQ Ratio = Equivalence Ratio
    
    
  • ECU = Engine Control Unit
    
    
  • FXT = Forester XT model
    
    
  • LGT = Legacy GT model
    
    
  • MAF = Mass Airflow
    
    
  • MT = Manual Transmission
    
    
  • OL = Open Loop fueling
    
    
  • RPM = Revolutions Per Minute (referring to engine speed)
    
    
  • TGV = Tumble Generator Valve
    
    
  • TPS = Throttle Position Sensor (or more generically referring to throttle position)
    
    
  • VDC = Vehicle Dynamics Control
    
    
  • VSS = Vehicle Speed Sensor (or more generically referring to vehicle speed)

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AVCS Exhaust Right (AVCS Exh Right) -> Exhaust Active Valve Control System (AVCS) timing for the right bank based on the corresponding exhaust camshaft position sensor.

AVCS Exhaust Target Final LEFT (AVCS Exh Target Final L) -> Exhaust Active Valve Control System (AVCS) final target timing for the left bank.

AVCS Exhaust Target Final RIGHT (AVCS Exh Target Final R) -> Exhaust Active Valve Control System (AVCS) final target timing for the right bank.

AVCS Exhaust Target TABLE FINAL (AVCS Exh Table Final) -> This is the final AVCS exhaust table value after TGV blending and compensations are applied.

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AVCS Intake Right (AVCS In Right) -> Intake Active Valve Control System (AVCS) timing for the right bank based on the corresponding intake camshaft position sensor.

AVCS Intake Target Final LEFT (AVCS In Target Final L) -> Intake Active Valve Control System (AVCS) final target timing for the left bank.

AVCS Intake Target Final RIGHT (AVCS In Target Final R) -> Intake Active Valve Control System (AVCS) final target timing for the right bank.

AVCS Intake Target TABLE (AVCS In Table) -> This is the table value from the AVCS Intake Cam Advance Target table before any compensations are applied.

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Gear Position ESTIMATED (Gear Position) -> Current estimated gear position as determined by the ECU. This value is estimated based on RPM and vehicle speed.

Gear Position ESTIMATED Req Torque (Gear Position RT) -> Current estimated gear position used to determine requested torque table switching. This value is estimated based on RPM and vehicle speed for 6MT cars.

Hot Restart Enrichment (Hot Restart Enr) -> Post-start hot-restart decay enrichment fuel adder (EQ ratio) as determined by the 'Hot-Restart Enrichment...' tables. This value begins decaying after engine start to provide post-start enrichment during hot-restart conditions. Higher values indicate greater enrichment.

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Warm Up Enrichment Stratified (Warm up Enrich S) -> Warm-up enrichment fuel adder (EQ ratio) in stratified fuel mode. This adder provides warm-up enrichment based on coolant temperature. Higher values indicate greater enrichment.

Warm up Mode (Warm up Mode) -> Warm-up mode that determines switching between the "Fuel Pressure Target" tables and other functions in the ECU.

Wastegate Duty (Wastegate Duty) -> Final wastegate duty cycle as determined by the ECU's boost control logic. This value is manipulated in order to hit the boost target.

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