Subaru Factory Monitor Descriptions For Accesstuner And V3 Accessport

May 2024

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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Radiator Fan Relay 2 Switch (Rad Fan 2 Sw) -> Radiator fan relay #2 status as determined by the ECU. Value is ON (or 1) when the ECU determines that the relay should be on.

Req Tor Mode  ->(19-20 ascent, 20-22 outback).  Used to determine which requested torque tables are being used at a given time.

Requested Torque (Req Torque) -> Requested torque as determined by the 'Requested Torque' table(s) and used as an input to the 'Target Throttle Angle...' table(s) to determine the target throttle angle.

...

TPS Duty (TPS Duty) -> Throttle motor duty as determined by the ECU. This value is manipulated in order to hit a throttle target.

TPS RPM Arbit Input Delta ->This is used as an input to the “Ignition Timing Compensation (Tip-In)…” tables.

TPS Voltage (TPS Volts) -> Throttle position sensor output voltage.

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