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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Fuel Injector Timing CRANKING TABLE SOI NEW (Inj Timing Crank Table SOI NEW) -> This is the table value from the Fuel Injector Start of Injection (Cranking) table. This uses a new conversion that more closely represents actual SOI.

Fuel Injector Timing CRANKING TABLE SOI OLD (Inj Timing Crank Table SOI OLD) -> (Beta) This is the table value from the Fuel Injector Start of Injection (Cranking) table.

Fuel Injector Timing Homogeneous EOI NEW (Inj Timing H EOI NEW) -> (Beta) End of injection (in crank degrees btdc) calculated from the Start of Injection  (Homogeneous) Main table(s) with comps, RPM, and IPW in homogeneous fuel mode. This uses a new base conversion that more closely represents actual.

Fuel Injector Timing Homogeneous EOI to IgnitionOLD (Inj Timing H EOI IgnOLD) -> (Beta) End of injection (EOI) to ignition timing (in crank degrees btdc) calculated from EOI and ignition timing the Start of Injection  (Homogeneous) Main table(s) with comps, RPM, and IPW in homogeneous fuel mode.

Fuel Injector Timing Homogeneous EOI to Ignition TimeNEW (Inj Timing H EOI Ign TimeNEW) -> End of injection (EOI) to ignition timing (in crank degrees) calculated from EOI and ignition timing in homogeneous fuel mode. This uses a new base conversion that more closely represents actual.

Fuel Injector Timing Homogeneous EOI to Ignition OLD (Inj Timing H EOI Ign OLD) -> (Beta) End of injection (EOI) to ignition timing (in crank degrees) calculated from EOI and ignition timing in homogeneous fuel mode.

Fuel Injector Timing Homogeneous EOI to Ignition Time NEW (Inj Timing H EOI Ign Time NEW) -> Time of End of injection (EOI) to ignition timing calculated from EOI, ignition timing, and RPM in homogeneous fuel mode. This uses a new base conversion that more closely represents actual.

Fuel Injector Timing Homogeneous EOI to Ignition Time OLD (Inj Timing H EOI Ign Time OLD) -> (Beta) Time of End of injection (EOI) to ignition timing calculated from EOI, ignition timing, and RPM in homogeneous fuel mode.

Fuel Injector Timing Homogeneous SOI NEW (Inj Timing H SOI NEW) -> This is the final table value (in crank degrees btdc) from the Fuel Injector Start of Injection (Homogeneous) Main table(s) with compensations applied. This uses a new conversion that more closely represents actual SOI.

Fuel Injector Timing Homogeneous SOI OLD (Inj Timing H SOI OLD) -> (Beta) This is the final table value (in crank degrees btdc) from the Fuel Injector Start of Injection (Homogeneous) Main table(s) with compensations applied.

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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.ON (or 1) when the ECU determines that the relay should be on.

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.

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Requested Torque Limit TCM OEM BASE (Req Tor TCM Base) -> Base requested torque limit as determined by the transmission control module (TCM) during normal operation. This value is further manipulated by specific compensations to determine a final limit.

Requested Torque Mode (Req Torque Mode) -> This is the final requested torque mode that determines requested torque table switching.

Requested Torque Ratio (Req Torq Ratio) -> Requested Torque Ratio as used as an input to the 'Target Throttle Angle...' tables. This value is calculated as follows: requested torque / requested torque ratio base. The requested torque ratio base is determined by the 'Requested Torque (Ratio Base)' table.

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SI Drive Mode (SI Drive Mode) -> This is the final SI-DRIVE mode used to determine requested torque table switching as follows: SPORT ('S' or 1), SPORT# ('S#' or 2), INTELLIGENT ('I' or 3)3), XMODE Snow/Dirt or Single (4), XMODE Deep Snow/Mud (7) where applicable

Target Throttle Angle (Target Throttle) -> Target throttle plate opening position during non-idle conditions. This value is determined by requested torque and RPM.

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

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

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