SFI SYSTEM (w/o EGR System) FREEZE FRAME DATA


  1. DESCRIPTION


    • The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

      Tech Tips

      If it is impossible to replicate the problem even though a DTC is detected, confirm the freeze frame data.


    • A01NH6ZE01

      The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the intelligent tester, 5 separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.


      • 3 data sets before the DTC was set.

      • 1 data set when the DTC was set.

      • 1 data set after the DTC was set.


      • These data sets can be used to simulate the condition of the vehicle around the time of the occurrence of the malfunction. The data may assist in identifying the cause of the malfunction, and judging whether it was temporary or not.

  2. LIST OF FREEZE FRAME DATA

    Label

    (Tester Display)

    		 Measurement Item Diagnostic Note
    Vehicle Speed Vehicle speed Speed indicated on speedometer
    Engine Speed Engine speed -
    Calculate Load Calculated load Calculated load by ECM
    Vehicle Load Vehicle load -
    MAF Mass air flow volume

    If value approximately 0.0 gm/sec:


    • Mass air flow meter sub-assembly power source circuit open or shorted


    • VG circuit open or shorted

    If value 271.0 gm/sec or more:


    • E2G circuit open
    Atmosphere Pressure Atmospheric pressure -
    MAP Intake manifold pressure -
    Coolant Temp Engine coolant temperature

    If value -40°C (-40°F), sensor circuit open

    If value 140°C (284°F) or more, sensor circuit shorted
    Intake Air Intake air temperature

    If value -40°C (-40°F), sensor circuit open

    If value 140°C (284°F), sensor circuit shorted
    Engine Run Time Accumulated engine running time -
    Initial Engine Coolant Temp Initial engine coolant temperature -
    Initial Intake Air Temp Initial intake air temperature -
    Battery Voltage Battery voltage -
    Throttle Sensor Volt % Throttle position -
    Throttl Sensor #2 Volt % Throttle sensor positioning #2 -
    Throttle Sensor Position Throttle sensor positioning -
    Throttle Motor DUTY Throttle actuator -
    Injector (Port) Fuel injector assembly -
    Injection Volum (Cylinder 1) Injection volume -
    Fuel Pump Speed Control Fuel pump speed control status -
    Fuel Pump/Speed Status Fuel pump/speed status -
    EVAP (Purge) VSV EVAP purge VSV duty ratio -
    Evap Purge Flow Purge flow -
    Purge Density Learn Value Learning value of purge density -
    EVAP Purge VSV EVAP purge VSV -
    Purge Cut VSV Duty Purge VSV duty -
    Target Air-Fuel Ratio Target air fuel ratio -
    AF Lambda B1S1 Fuel trim at air fuel ratio sensor -
    AF Lambda B2S1 Fuel trim at air fuel ratio sensor -
    AFS Voltage B1S1 Air fuel ratio sensor output -
    AFS Voltage B2S1 Air fuel ratio sensor output -
    AFS Current B1S1 Air fuel ratio sensor current -
    AFS Current B2S1 Air fuel ratio sensor current -
    A/F Heater Duty #1 Air fuel ratio heater duty ratio -
    A/F Heater Duty #2 Air fuel ratio heater duty ratio -
    O2S B1S2 Heated oxygen sensor output -
    O2S B2S2 Heated oxygen sensor output -
    O2 Heater B1S2 Heated oxygen sensor heater -
    O2 Heater B2S2 Heated oxygen sensor heater -
    O2 Heater Curr Val B1S2 Heated oxygen sensor current -
    O2 Heater Curr Val B1S2 Heated oxygen sensor current -
    Short FT #1 Short-term fuel trim Short-term fuel compensation used to maintain air fuel ratio at stoichiometric air fuel ratio
    Long FT #1 Long-term fuel trim Overall fuel compensation carried out in long-term to compensate a continual deviation of short-term fuel trim from central value
    Total FT #1 Total fuel trim -
    Short FT #2 Short-term fuel trim Short-term fuel compensation used to maintain air fuel ratio at stoichiometric air fuel ratio
    Long FT #2 Long-term fuel trim Overall fuel compensation carried out in long-term to compensate a continual deviation of short-term fuel trim from central value
    Total FT #2 Total fuel trim -
    Fuel System Status #1 Fuel system status (Bank 1)

    • OL (Open Loop): Has not yet satisfied conditions to go closed loop

    • CL (Closed Loop): Using air fuel ratio sensor as feedback for fuel control

    • OLDrive: Open loop due to driving conditions (fuel enrichment)

    • OLFault: Open loop due to detected system fault

    • CLFault: Closed loop but air fuel ratio sensor, which used for fuel control malfunctioning
    Fuel System Status #2 Fuel system status (Bank 2)

    • OL (Open Loop): Has not yet satisfied conditions to go closed loop

    • CL (Closed Loop): Using air fuel ratio sensor as feedback for fuel control

    • OLDrive: Open loop due to driving conditions (fuel enrichment)

    • OLFault: Open loop due to detected system fault

    • CLFault: Closed loop but air fuel ratio sensor, which used for fuel control malfunctioning
    IGN Advance Ignition advance -
    Knock Feedback Value Feedback value of knocking -
    Knock Correct Learn Value Correction learning value of knocking -
    Actual VVT Angle #1 Actual VVT angle (Bank 1) -
    Actual VVT Angle #2 Actual VVT angle (Bank 2) -
    VVT Control Status #1 VVT control status (Bank 1) -
    VVT Control Status #2 VVT control status (Bank 2) -
    Catalyst Temp B1S1 Catalyst temperature -
    Catalyst Temp B2S1 Catalyst temperature -
    Catalyst Temp B1S2 Catalyst temperature -
    Catalyst Temp B2S2 Catalyst temperature -
    Closed Throttle Position SW Closed throttle position switch -
    Fuel Cut Condition Fuel cut condition ON or OFF -
    TC Terminal TC terminal status -
    Time after DTC Cleared Cumulative time after DTC cleared -
    Distance from DTC Cleared Accumulated distance after DTC cleared -
    Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared -
    Dist Batt Cable Disconnect Accumulated distance from battery cable disconnected -
    IG OFF Elapsed Time Cumulative time after power switch off -
    TC and TE1 TC and TE1 terminals of DLC3 -
    Ignition Trig. Count Ignition count -
    Cylinder #1 Misfire Count Cylinder #1 misfire count -
    Cylinder #2 Misfire Count Cylinder #2 misfire count -
    Cylinder #3 Misfire Count Cylinder #3 misfire count -
    Cylinder #4 Misfire Count Cylinder #4 misfire count -
    Cylinder #5 Misfire Count Cylinder #5 misfire count -
    Cylinder #6 Misfire Count Cylinder #6 misfire count -
    All Cylinders Misfire Count All cylinder misfire count -
    Misfire RPM Misfire engine speed -
    Misfire Load Misfired load -
    Misfire Margin Misfired monitoring -
    A/F Learn Value Idle #1 Idle area of air fuel ratio learn value (Bank 1) -
    A/F Learn Value Low #1 Low load area of air fuel ratio learn value (Bank 1) -
    A/F Learn Value Mid1 #1 Middle 1 load area of air fuel ratio learn value (Bank 1) -
    A/F Learn Value Mid2 #1 Middle 2 load area of air fuel ratio learn value (Bank 1) -
    A/F Learn Value High #1 High load area of air fuel ratio learn value (Bank 1) -
    A/F Learn Value Idle #2 Idle area of air fuel ratio learn value (Bank 2) -
    A/F Learn Value Low #2 Low load area of air fuel ratio learn value (Bank 2) -
    A/F Learn Value Mid1 #2 Middle 1 load area of air fuel ratio learn value (Bank 2) -
    A/F Learn Value Mid2 #2 Middle 2 load area of air fuel ratio learn value (Bank 2) -
    A/F Learn Value High #2 High load area of air fuel ratio learn value (Bank 2) -
    Electric Fan Motor Electric fan motor (Cooling fan motor) -
    Idle Fuel Cut Idle fuel cut -
    FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent incomplete engine combustion
    Communication with HV Status of the communication with power management control ECU -
    Communication with Brake Status of the communication with skid control ECU -
    Comm with Air Conditioner Status of the communication with air conditioning amplifier assembly -
    Requested Engine Torque Requested engine torque Flag information for hybrid vehicle
    HV Target Engine Speed HV target engine speed Flag information for hybrid vehicle
    Actual Engine Torque Actual engine torque Flag information for hybrid vehicle
    Engine Run Time Engine run time Flag information for hybrid vehicle
    Request Engine Run Time Request engine run time Flag information for hybrid vehicle
    Judge Time Engine Ignition Judge time for engine ignition Flag information for hybrid vehicle
    Judge Time Engine Output Judge time for time until engine output Flag information for hybrid vehicle
    Fuel Level Fuel level Flag information for hybrid vehicle
    ISC Learning ISC learning Flag information for hybrid vehicle
    F/C for Engine Stop Req Fuel cut for engine stop request Flag information for hybrid vehicle
    Engine Independent Engine independent operation Flag information for hybrid vehicle
    Racing Operation Racing operation Flag information for hybrid vehicle
    Request Warm-up Request engine warm up Flag information for hybrid vehicle
    Engine Independent Control Engine independently control operation Flag information for hybrid vehicle
    ISC Learning Value ISC learning value Flag information for hybrid vehicle