Subaru Factory Monitor Descriptions For Accesstuner And V3 Accessport

November

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2023

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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Fuel Injector Timing Homogeneous TABLE (Inj Timing H Table) -> This is the final table value from the Fuel Injector Start of Injection (Homogeneous) Main table with compensations applied.

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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.

Gear Speed (Gear Speed) -> This is the rev/mi calculation by the ECU based on RPM and vehicle speed to determine the current estimated gear.

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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Ignition Timing (Ignition Timing) -> Total ignition timing for cylinder #1. This includes all compensations and corrections.

Ignition Timing Comp Gear Shift Transition (Ign Comp Gear Shift) -> 'Gear shift' ignition timing compensation (active generally with on-to-off throttle shifts after accelerating).

Ignition Timing Comp Intake Temp (Ign Comp IAT) -> Final intake temperature based ignition timing compensation table with activation compensation applied (any max limit if applicable).

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