Subaru Factory Monitor Descriptions For Accesstuner And V3 Accessport

...

November 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)

...

Accelerator Voltage MAIN (Accel VoltVolts Main) -> Main accelerator pedal position sensor output voltage.

Accelerator Voltage SUB (Accel Volt Volts Sub) -> Sub accelerator pedal position sensor output voltage.

...

AF Correction 3 (AF Correction 3) -> Short-term (immediate) fueling correction in closed loop based on input from the rear oxygen sensor. This is a percentage correction of the injector pulse widthclosed loop fueling target. Positive values indicate fuel is being added as a result of the correction. Negative values indicate fuel is being removed.

...

AF Sensor 3 Voltage (AF Sens 3 VoltVolts) -> Rear oxygen sensor output voltage.

AF Sensor 3 Voltage DIRECT (AF Sens 3 Volt Volts Direct) -> Rear oxygen sensor output voltage direct (higher precision and full 0-5v range as compared to non-direct monitor).

...

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 Final With Comps TABLE (AVCS Exh Table) -> This is the table value from the AVCS Exhaust Cam Retard Target table before any 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 Open) table before any compensations are applied.

AVCS Intake Left (AVCS In LeftValue 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 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.

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 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 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.

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

AVCS Intake RightIntake 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 RightTarget Final R) -> Intake Active Valve Control System (AVCS) final target timing for the right bank based on the corresponding intake camshaft position sensor.

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

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

...

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

AVCS Intake Target With Comps TABLE (AVCS In Table) -> This is the table value from the AVCS Intake Cam Advance Target table with some compensations applied.

Barometric Pressure (Baro Pressure) -> Barometric pressure based on the barometric pressure sensor.

Battery Voltage (Battery VoltVolts) -> Battery voltage as determined by the battery voltage input to the ECU.

Boost Limits Base TABLE FINAL Rel Sea Level (Limits Boost Table Base Final Rel SL) -> This is the table value from the Boost Limits tableboost limit after all applicable boost compensations have been applied.

Boost Limits FINAL Base TABLE Rel Sea Level (Limits Boost Final Table Base Rel SL) -> This is the boost limit after all applicable boost compensations have been appliedtable value from the Boost Limits table.

Boost Limits TABLE Rel Sea Level (Limits Boost Table Rel SL) -> This is the table value from the Boost Limits table.

...

Coolant Temperature (Coolant Temp) -> Coolant temperature based on the engine coolant temperature sensor.

CPC Purge Flow (CPC Purge Flow) -> Estimated current canister purge flow as determined by the ECU.

CPC Purge Fuel Learning (CPC Purge Fuel Learn) -> Canister purge trim learning component as determined by the ECU.

CPC Purge Fuel Trim (CPC Purge Fuel Trim) -> Fuel trim adder based on learning during canister purge control events. This correction is NOT reflected in other fuel trim monitors.

...

Crankshaft Position Switch (Crankshaft Sw) -> Crankshaft position sensor output. Value is ON (or 1) with crankshaft rotation (i.e. when the engine is running)the engine is running).

CVT Lockup Status (CVT Lockup Status) -> Continuously variable transmission (CVT) torque converter lock-up state: 0 = Open, 2 = Partial, 4 = Full.

CVT Temperature (CVT Temp) -> Continuously variable transmission (CVT) fluid temperature as reported by the transmission control module (TCM).

...

Dynamic Advance Multiplier (Dyn Adv Mult) -> This is a learned correction applied to dynamic advance. The dynamic advance multiplier (DAM) is one of three knock responses. When conditions dictate that a change to the DAM is to occur, the current knock signal is referenced and the DAM is set to an initial value. If a knock event has occurred, the DAM will decrease. If there's no knock event, the DAM will increase (if no knock over a delay period). The DAM is reset to an initial value after an ECU reset or after a reflash. For the 02-05 WRX, the DAM ranges from 0 to 16 and its application to dynamic advance can be calculated as follows: dynamic advance map value * (DAM/16). For all other ECUs, the DAM ranges from 0 to 1 (decimal value) and is applied as follows: dynamic advance map value * DAM.

EGR ActualCommanded (EGR ActualCommanded) -> Exhaust Gas Recirculation (EGR) valve actualcommanded.

EGR CommandedEstimate (EGR CommandedEstimate) -> Exhaust Gas Recirculation (EGR) valve commandedactual as estimated by the ECU.

Engine Run Time (Engine Run Time) -> This is the counter that is incremented when the engine is running.

Engine Speed (RPM) -> Engine speed in crankshaft revolutions per minute based on the crankshaft position sensoron 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: current (smoothed RPM - previous current RPM).

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

Engine Torque (Engine Torque) -> Engine torque estimate by the ECU.

Evap Related Fuel Adder (Evap Fuel Adder) -> Evaporative systems related fuel adder (EQ ratio).

...

Exhaust Gas Temperature Voltage DIRECT (EGT Volt Volts Direct) -> Exhaust Gas Temperature sensor output voltage direct.

...

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.

...

Fuel Temperature Voltage DIRECT (Fuel Temp Volt Volts Direct) -> Fuel temperature sensor output voltage direct.

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 as determined 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 . This value is estimated 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.

...

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 - idle speed target(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.

Idle Table Mode (Idle Table Mode) -> Idle mode that determines switching between multiple "Idle Speed Targets" tables.

Ignition Switch (Ignition Sw) -> Ignition switch status. Value is ON (or 1) when the ignition switch is on.

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

...

Knock Sum (Knock Sum) -> Counter which is incremented when a non-consecutive knock event, as perceived by the ECU, occurs. This value may be reset to zero when a certain threshold is reached. Note: This On some ECUs, this counter may be incremented even at idle and low load/RPM where false knock detection is a greater probability.

...

Mass Airflow Frequency (MAF Freq) -> Mass airflow sensor output frequency.

Mass Airflow Voltage (MAF VoltVolts) -> Mass airflow sensor output voltage.

Mass Airflow Voltage DIRECT (MAF Volt Volts Direct) -> Mass airflow sensor output voltage direct (higher precision as compared to non-direct monitor).

...

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.

...

TGV Output Switch (TGV Output Sw) -> Tumble generator valve output status as determined by the ECU. Value is ON (or 1) when ECU intends to change the position of the TGVs.

TGV Voltage Left (TGV Volt Volts Left) -> Tumble generator valve (TGV) output voltage as determined by the TGV position sensor in the left bank.

TGV Voltage Left DIRECT (TGV Volt Volts Left Direct) -> Tumble generator valve (TGV) output voltage direct (higher precision and unfilitered as compared to non-direct monitor) as determined by the TGV position sensor in the left bank.

TGV Voltage Left DIRECT Smoothed (TGV Volt Volts Left Direct Sm) -> Tumble generator valve (TGV) output voltage direct smoothed (higher precision as compared to non-direct monitor) as determined by the TGV position sensor in the left bank.

TGV Voltage Right (TGV Volt Volts Right) -> Tumble generator valve (TGV) output voltage as determined by the TGV position sensor in the right bank.

TGV Voltage Right DIRECT (TGV Volt Volts Right Direct) -> Tumble generator valve (TGV) output voltage direct (higher precision and unfilitered as compared to non-direct monitor) as determined by the TGV position sensor in the right bank.

TGV Voltage Right DIRECT Smoothed (TGV Volt Volts Right Direct Sm) -> Tumble generator valve (TGV) output voltage direct smoothed (higher precision as compared to non-direct monitor) as determined by the TGV position sensor in the right bank.

...

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

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

TPS Voltage MAIN (TPS VoltageVolts Main) -> Main throttle position sensor output voltage.

TPS Voltage SUB (TPS Voltage Volts Sub) -> Sub throttle position sensor output voltage.

...

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.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.

...

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.