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Subaru Factory Monitor Descriptions For Accesstuner And V3 Accessport

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September 2021

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)

Monitor Descriptions (in alphabetical order)

Note: Accesstuner name shown first; Accessport name shown second in parentheses.

NOTE: ALL MONITORS ARE NOT AVAILABLE FOR ALL VEHICLES DUE TO DIFFERENCES IN VEHICLE HARDWARE AND/OR ENGINE CONTROL UNIT (ECU) DIFFERENCES. SOME MONITORS ARE ONLY AVAILABLE IN THE LATEST ECU VERSION (STRATEGY).

AC Compressor Switch (AC Compressor Sw) -> Air conditioning compressor state as dictated by the ECU. Value is ON (or 1) when the compressor is commanded to engage.

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AT Torque Down Perm Switch (AT Torq Per Sw) -> Automatic transmission torque-down permission as relayed by the transmission control module.

AVCS Exhaust LeftActivation Post Reset Flag (AVCS Exh LeftActivate Post Reset Flag) -> Exhaust Active Valve Control System (AVCS) timing for the left bank based on the corresponding exhaust camshaft position sensor.

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 TABLE TGV CLOSED (AVCS Exh TGV CL Table) -> This is Value is 'ON' (or 1) when the post-reflash/reset AVCS exhaust control learned state is complete and 'OFF' (or 0) when it is not yet complete. After an ECU reflash or reset, the ECU defaults to disabling AVCS control until certain conditions are met at idle. The post-reflash/reset AVCS learned state must be complete before active AVCS control is allowed.

AVCS Exhaust Control Flag (AVCS Exh Control Flag) -> Value is 'ON' (or 1) when the AVCS exhaust control is currently active and 'OFF' (or 0) when it is inactive.

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

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

AVCS Exhaust Target TABLE TGV CLOSED (AVCS Exh TGV CL Table) -> This is the table value from the AVCS Exhaust Cam Retard Target (TGVs Closed) table before any compensations are applied.

AVCS Exhaust Target TABLE TGV OPEN (AVCS Exh TGV OP Table) -> This is the table value from the AVCS Exhaust Cam Retard Target (TGVs ClosedOpen) table before any compensations are applied.

AVCS Exhaust Target With Comps TABLE TGV OPEN (AVCS Exh TGV OP Table) -> This is the table value from the AVCS Exhaust Cam Retard Target (TGVs Open) table before any compensations are applied.AVCS Exhaust Target With Comps TABLE (AVCS Exh Table) -> This is the table value from the AVCS Exhaust Cam Retard Target table with some compensations appliedfrom the AVCS Exhaust Cam Retard Target table with some compensations applied.

AVCS Intake Activation Post Reset Flag (AVCS In Activate Post Reset Flag) -> Value is 'ON' (or 1) when the post-reflash/reset AVCS intake control learned state is complete and 'OFF' (or 0) when it is not yet complete. After an ECU reflash or reset, the ECU defaults to disabling AVCS control until certain conditions are met at idle. The post-reflash/reset AVCS learned state must be complete before active AVCS control is allowed.

AVCS Intake Control Flag (AVCS In Control Flag) -> Value is 'ON' (or 1) when the AVCS intake control is currently active and 'OFF' (or 0) when it is inactive.

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

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

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

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Engine Speed (RPM) -> Engine speed in crankshaft revolutions per minute based on the crankshaft position sensor.

Engine Speed Delta 1 (RPM Delta 1) -> Current RPM delta calculated (generally) as follows: (current RPM - previous RPM) with additional filtering.

Engine Speed Delta 2 (RPM Delta 2) -> Current RPM delta calculated (generally) as follows: (smoothed RPM - current RPM) with additional filtering.

Engine Speed Delta 3 (RPM Delta 3) -> Current RPM delta calculated (generally) as follows: (smoothed RPM - current RPM).

Engine Start MODE (Engine Start Mode) -> Engine start mode used as an input to some post-start enrichment tables.

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Idle Mode Switch (Idle Mode Sw) -> Idle mode status as determined by the ECU. Value is ON (or 1) when idle mode is active. Idle mode is primarily determined by throttle position for drive-by-cable cars and requested torque for drive-by-wire cars.

Idle Speed Error 1 (Idle Speed Error 1) -> Current idle RPM delta calculated as follows: RPM w/ smoothing - (smoothed RPM - idle speed target).

Idle Speed Error 2 (Idle Speed Error 2) -> Current idle RPM delta calculated as follows: (idle speed target - current RPM).

Idle Speed Target (Idle Spd Target) -> Idle RPM target as determined by the ECU.

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Post Start AVCS Disabled Map Ratio (PS AVCS Disable Ratio) -> Post-start AVCS disabled map ratio multiplier that determines the switching (and blending) between "...Post-Start AVCS Disabled" tables and the corresponding "Main" tables. The final table value is calculated as follows: (AVCS disabled table * map ratio) + (Main table * (1.0 - map ratio)). Note: For some ECUs, the "AVCS disabled table", when active, is a maximum limit applied to the "Main" table.

Post Start Enrich Homogeneous (Post Start H) -> Post-start fuel adder (EQ ratio) in homogeneous fuel mode. This value begins decaying after engine start to provide post-start enrichment. Higher values indicate greater enrichment.

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Wastegate Position Learned Correction (Wastegate Pos Learn Corr) -> This is a learned correction (based on fully closed wastegate states) that is applied to the commanded wastegate position to determine the final commanded wastegate position.

WWC 1 Load Delta (WWC 1 Load Delta) -> Caclulated load delta determined as: (current load - previous load) as used in wall-wetting compensation group 1 logic.

WWC 1 MAP Delta (WWC 1 MAP Delta) -> Manifold absolute pressure (MAP) delta determined as: (current MAP - previous MAP) as used in wall-wetting compensation group 1 logic.