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SFI SYSTEM FREEZE FRAME DATA

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  1. DESCRIPTION


    • Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was Lean or Rich, and other data from the time the malfunction occurred.

      Tip:

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


    • A017B41E15

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


      • 3 data set 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 of the cause of the malfunction, and in judging whether it was temporary or not.

  2. LIST OF FREEZE FRAME DATA

    LABEL

    (Intelligent Tester Display)

    		 Measure Item/Range Diagnostic Note
    Trouble Code Freeze DTC -
    Injector Injector -
    IGN Advance Ignition advance -
    Calculate load Calculate load Calculated load by ECM
    Vehicle Load Vehicle load -
    MAF Mass air flow volume

    If value is approximately 0.0 g/s:


    • Mass air flow meter power source circuit open or shorted


    • VG circuit open or shorted

    If value is 160.0 g/s or more:


    • E2G circuit open
    Engine Speed Engine speed -
    Vehicle Speed Vehicle speed Speed indicated on speedometer
    Coolant Temp Engine coolant temperature

    If value is -40°C, sensor circuit open

    If value is 140°C, sensor circuit shorted
    Intake Air Intake air temperature

    If value is -40°C, sensor circuit open

    If value is 140°C, sensor circuit shorted
    Air-Fuel Ratio Air-fuel ratio -
    Purge Density Learn Value Learning value of purge density -
    Purge Flow Purge flow -
    EVAP (Purge) VSV EVAP purge VSV duty ratio -
    Knock Correct Learn Value Correction learning value of knocking -
    Knock Feedback Value Feedback value of knocking -
    Accelerator Position No. 1 Absolute accelerator pedal position No. 1 -
    Accelerator Position No. 2 Absolute accelerator pedal position No. 2 -
    Throttle Position Throttle position Read value with ignition switch on (IG) (Do not start engine)
    Throttle Sensor Position Throttle sensor positioning Read value with ignition switch on (IG) (Do not start engine)
    Throttle Sensor Position #2 Throttle sensor positioning #2 -
    Throttle Motor Throttle actuator -
    O2S B1 S2 Heated oxygen sensor output Performing Control the Injection Volume or Control the Injection Volume for air fuel ratio sensor function of Active Test enables technician to check output voltage of sensor
    O2S B2 S2 Heated oxygen sensor output Performing Control the Injection Volume or Control the Injection Volume for air fuel ratio sensor function of Active Test enables technician to check output voltage of sensor
    AFS B1 S1 Air fuel ratio sensor output Performing Control the Injection Volume or Control the Injection Volume for air fuel ratio sensor function of Active Test enables technician to check output voltage of sensor
    AFS B2 S1 Air fuel ratio sensor output Performing Control the Injection Volume or Control the Injection Volume for air fuel ratio sensor function of Active Test enables technician to check output voltage of sensor
    AFS B2 S1 Air fuel ratio sensor current -
    Total FT #1 Total fuel trim -
    Total FT #2 Total fuel trim -
    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 for a continual deviation of short-term fuel trim from central valve
    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 for a continual deviation of short-term fuel trim from central valve
    Fuel System Status (Bank 1) Fuel system status (Bank 1)

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


    • CL (Closed Loop): Using heated oxygen sensor as feedback for fuel control


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


    • OL FAULT: Open loop due to detected system fault


    • CL FAULT: Closed loop but heated oxygen sensor, which used for fuel control malfunctioning
    Fuel System Status (Bank 2) Fuel system status (Bank 2)

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


    • CL (Closed Loop): Using heated oxygen sensor as feedback for fuel control


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


    • OL FAULT: Open loop due to detected system fault


    • CL FAULT: Closed loop but heated oxygen sensor, which used for fuel control malfunctioning
    AF FT B1 S1 Fuel trim at air fuel ratio sensor -
    AF FT B1 S1 Air fuel ratio sensor current -
    AF FT B2 S1 Fuel trim at air fuel ratio sensor -
    Catalyst Temp (B1 S1) Catalyst temperature -
    Catalyst Temp (B2 S1) Catalyst temperature -
    Catalyst Temp (B1 S2) Catalyst temperature -
    Catalyst Temp (B2 S2) Catalyst temperature -
    Initial Engine Coolant Temp Initial engine coolant temperature -
    Initial Intake Air Temp Initial intake air temperature -
    Injection Volume (Cylinder 1) Injection volume -
    Starter Signal Starter signal -
    Power Steering Switch Power steering signal -
    Power Steering Signal Power steering signal (history) Signal status usually ON until ignition switch turned off
    Closed Throttle Position SW Closed throttle position switch -
    A/C Signal Air conditioning signal -
    Neutral Position SW Signal PNP switch signal -
    Electrical Load Signal Electrical load signal -
    Stop Light Switch Stop light switch -
    Battery Voltage Battery voltage -
    Atmosphere Pressure Atmospheric pressure -
    Fuel Pump Speed Control Fuel pump speed control status -
    ACIS VSV ACIS VSV -
    VVT Control Status (Bank 2) VVT control status (bank 2) -
    EVAP Purge VSV VSV for EVAP -
    Fuel Pump/Speed Status Fuel pump/speed status -
    VVT Control Status (Bank 1) VVT control status (bank 1) -
    Electric Fan Motor Electric fan motor ON: Operate
    AICV VSV AICV VSV -
    TC and TE1 TC and TE1 terminals of DLC3 -
    ACM Active control mount VSV duty ratio -
    VVT Aim Angle (Bank 1) VVT aim angle (bank 1) -
    VVT Change Angle (Bank 1) VVT change angle (bank 1) -
    VVT OCV Duty (Bank 1) VVT OCV operation duty (bank 1) -
    VVT Ex Hold Lrn Val VVT exhaust hold duty ratio learning value (bank 1) -
    VVT Ex Chg Angle (Bank 1) VV exhaust change angle (bank 1) -
    VVT Ex OCV Duty (Bank 1) VVT exhaust OCV duty (bank 1) -
    VVT Aim Angle (Bank 2) VVT aim angle (bank 2) -
    VVT Change Angle (Bank 2) VVT change angle (bank 2) -
    VVT OCV Duty (Bank 2) VVT OCV operation duty (bank 2) -
    VVT Ex Hold Lrn Val (Bank 2) VVT exhaust hold duty ration learning value (bank 2) -
    VVT Ex Chg Angle (Bank 2) VVT exhaust change angle (bank 2) -
    VVT Ex OCV Duty (Bank 2) VVT exhaust OCV duty (bank 2) -
    Idle Fuel Cut Idle fuel cut ON: when throttle valve fully closed and engine speed over 1500 rpm
    FC TAU FC TAU Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete
    Ignition Ignition -
    Cylinder #1 Misfire Rate Cylinder #1 misfire rate Displayed in only idling
    Cylinder #2 Misfire Rate Cylinder #2 misfire rate Displayed in only idling
    Cylinder #3 Misfire Rate Cylinder #3 misfire rate Displayed in only idling
    Cylinder #4 Misfire Rate Cylinder #4 misfire rate Displayed in only idling
    Cylinder #5 Misfire Rate Cylinder #5 misfire rate Displayed in only idling
    Cylinder #6 Misfire Rate Cylinder #6 misfire rate Displayed in only idling
    All Cylinders Misfire Rate All cylinder misfire rate Displayed in only idling
    Misfire RPM Misfire RPM -
    Misfire Load Misfire load -
    Misfire Margin Misfire monitoring -
    Engine Run Time Accumulated engine running time -
    Time after DTC Cleared Cumulative time after DTC cleared -
    Distance from DTC Cleared Accumulated distance from DTC cleared -
    Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared -