SFI 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 moving or stationary, 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 output, confirm the freeze frame data.


    • A019MF5E05

      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 is stored, can be checked.


      • 3 data sets before the DTC is stored.

      • 1 data set when the DTC is stored.

      • 1 data set after the DTC is stored.


      • 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 in judging whether it was temporary or not.

  2. LIST OF FREEZE FRAME DATA

    Tester Display Measurement Item Diagnostic Note
    Vehicle Speed Vehicle speed The speed indicated on the speedometer.
    Engine Speed Engine speed -
    Calculate Load Calculated load The load calculated by the ECM.
    Vehicle Load Vehicle load The load percentage in terms of the maximum intake air flow amount.
    MAF Air flow rate from mass air flow meter

    If the value is approximately 0.0 gm/sec.:


    • The mass air flow meter power source circuit is open.


    • The VG circuit is open or shorted.

    If 271.0 gm/sec. or more:


    • The E2G circuit is open.
    Atmosphere Pressure Atmospheric pressure -
    Coolant Temp Engine coolant temperature

    • If the value is -40°C (-40°F), the sensor circuit is open.


    • If the value is 140°C (284°F), the sensor circuit is shorted.
    Intake Air Intake air temperature

    • If the value is -40°C (-40°F), the sensor circuit is open.


    • If the value is 140°C (284°F), the sensor circuit is shorted.
    Engine Run Time Accumulated engine running time -
    Initial Engine Coolant Temp Engine coolant temperature at engine start -
    Initial Intake Air Temp Initial intake air temperature -
    Battery Voltage Battery voltage -
    Accel Sens. No. 1 Volt % Absolute accelerator pedal position No. 1 -
    Accel Sens. No. 2 Volt % Absolute accelerator pedal position No. 2 -
    Throttle Sensor Volt % Absolute throttle position sensor -
    Throttl Sensor #2 Volt % Absolute throttle position sensor #2 -
    Throttle Sensor Position Throttle sensor positioning -
    Throttle Motor DUTY Throttle actuator -
    Throttle Position Throttle valve opening angle When the engine stalls, is difficult to start, or idles roughly
    ISC Flow Flow rate calculated from information from each sensor When the engine stalls, is difficult to start, or idles roughly
    ISC Position Target valve opening angle calculated from ISC control When the engine stalls, is difficult to start, or idles roughly
    ISC Feedback Value ISC feedback value When the engine stalls, is difficult to start, or idles roughly
    ISC Learning Value ISC learning value When the engine stalls, is difficult to start, or idles roughly
    Electric Load Feedback Val Electrical load feedback value When the engine stalls, is difficult to start, or idles roughly
    Air Conditioner FB Val Air conditioner load feedback value When the engine stalls, is difficult to start, or idles roughly
    PS Feedback Val Power steering load feedback value When the engine stalls, is difficult to start, or idles roughly
    Low Revolution Control Status of low engine speed control When the engine stalls, is difficult to start, or idles roughly
    Neutral Control Neutral position control status for automatic transaxle When the engine stalls, is difficult to start, or idles roughly
    N Range Status Judgment for shift lever N position When the engine stalls, is difficult to start, or idles roughly
    Eng Stall Control FB Flow Feedback value of intake air flow When the engine stalls, is difficult to start, or idles roughly
    Deposit Loss Flow Deposit loss air flow rate When the engine stalls, is difficult to start, or idles roughly
    Injector (Port) Injection period of No. 1 cylinder -
    Injection Volum (Cylinder1) Injection volume (cylinder 1) The quantity of fuel injection volume for 10 times.
    Fuel Pump/Speed Status Fuel pump/status -
    TCV Status Tumble control valve status -
    EVAP (Purge) VSV EVAP (purge) VSV control duty The order signal from the ECM.
    Evap Purge Flow Ratio of evaporative purge flow to intake air volume -
    Purge Density Learn Value Learned value of purge density -
    EVAP Purge VSV VSV status for EVAP control -
    Purge Cut VSV Duty Purge VSV duty -
    Target Air-Fuel Ratio Ratio compared to stoichiometric level -
    AF Lambda B1S1 Fuel trim at air fuel ratio sensor -
    AFS Voltage B1S1 Air fuel ratio sensor output voltage for bank 1 sensor 1 -
    AFS Current B1S1 Air fuel ratio sensor output current for bank 1 sensor 1 -
    A/F Heater Duty #1 Air fuel ratio heater duty ratio -
    O2S B1S2 Heated oxygen sensor output voltage for bank 1 sensor 2 -
    O2S Impedance B1S2 Heated oxygen sensor impedance for bank 1 sensor 2 -
    O2 Heater B1S2 Heated oxygen sensor heater -
    O2 Heater Curr Val B1S2 Heated oxygen sensor current for bank 1 sensor 2 -
    Short FT #1 Short-term fuel trim of bank 1 Short-term fuel compensation is used to maintain the air fuel ratio at the stoichiometric level.
    Long FT #1 Long-term fuel trim of bank 1 Overall fuel compensation is carried out in the long-term to compensate for a continual deviation of the short-term fuel trim from the central value.
    Total FT #1 Total fuel trim of bank 1 -
    Fuel System Status #1 Fuel system status (bank 1)

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


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


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


    • OLFault: Open loop due to a detected system fault.


    • CLFault: Closed loop but the air fuel ratio sensor, which is used for fuel control, is malfunctioning.
    Fuel System Status #2 Fuel system status (bank 2) Unused
    IGN Advance Ignition timing advance for No. 1 cylinder -
    Knock Feedback Value Feedback value of knocking -
    Knock Correct Learn Value Learned knocking correction value -
    Idle Spark Advn Ctrl #1 Individual cylinder timing advance compensation amount (No. 1) When the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advn Ctrl #2 Individual cylinder timing advance compensation amount (No. 2) When the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advn Ctrl #3 Individual cylinder timing advance compensation amount (No. 3) When the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advn Ctrl #4 Individual cylinder timing advance compensation amount (No. 4) When the engine stalls, is difficult to start, or idles roughly
    ACIS VSV VSV for acoustic control induction system (ACIS) -
    AICV VSV VSV for air intake control system (AICV) -
    IAC Sensor Voltage Intake air control valve position sensor output voltage -
    Intake Air Control Position Intake air control valve position -
    VVT Control Status #1 VVT control (bank 1) status -
    VVT Advance Fail Status of VVT advance fail -
    Catalyst Temp B1S1 Estimated catalyst temperature (for sensor 1) -
    Catalyst Temp B1S2 Estimated catalyst temperature (for sensor 2) -
    Starter Signal Starter signal (STA terminal input status) -
    Power Steering Signal Power steering signal -
    Neutral Position SW Signal Park/neutral position switch status -
    Stop Light Switch Stop light switch status -
    A/C Signal A/C switch status -
    Idle Up Signal Idle up signal -
    Closed Throttle Position SW Closed throttle position switch -
    Fuel Cut Condition Fuel-cut condition -
    Immobiliser Communication Immobiliser communication -
    TC Terminal TC terminal status -
    Time after DTC Cleared Cumulative time after DTC cleared -
    Distance from DTC Cleared Total distance vehicle driven after DTC cleared -
    Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared -
    Dist Batt Cable Disconnect Total distance vehicle driven after battery cable disconnected -
    IG OFF Elapsed Time Cumulative time after engine switch off -
    TC and TE1 TC and TE1 terminals of DLC3 -
    Ignition Trig. Count Ignition counter to calculated misfire count -
    Cylinder #1 Misfire Count Misfire count of cylinder 1 -
    Cylinder #2 Misfire Count Misfire count of cylinder 2 -
    Cylinder #3 Misfire Count Misfire count of cylinder 3 -
    Cylinder #4 Misfire Count Misfire count of cylinder 4 -
    All Cylinders Misfire Count All cylinders misfire count -
    Misfire RPM Average engine speed when misfire occurs -
    Misfire Load Average engine load when misfire occurred -
    Misfire Margin Margin to detect engine misfire -
    Engine Speed (Starter Off) Engine speed when starter off When the engine stalls, is difficult to start, or idles roughly
    Starter Count Number of times starter turned on after engine switch turned from off to on (IG) When the engine stalls, is difficult to start, or idles roughly
    Run Dist of Previous Trip Distance traveled during previous trip

    • Run Dist of Previous Trip continues to display the distance traveled in the previous trip during the detection period of DTC P1604, which ends 5 seconds after the engine starts.

      Then the previous trip distance will be cleared and the distance traveled during this trip, which is calculated based on the vehicle speed, will be displayed.

    • When the engine is difficult to start and DTC P1604 is stored, Run Dist of Previous Trip will continue to be displayed.

      When inspecting for DTCs other than P1604, or when taking a snapshot, the distance traveled during this trip will be displayed.
    Engine Starting Time Engine run time (elapsed time from engine switch on (IG) to off) When the engine stalls, is difficult to start, or idles roughly
    Previous Trip Coolant Temp Coolant temperature of previous trip When the engine stalls, is difficult to start, or idles roughly
    Previous Trip Intake Temp Intake air temperature of previous trip When the engine stalls, is difficult to start, or idles roughly
    Engine Oil Temperature Engine oil temperature (estimated) When the engine stalls, is difficult to start, or idles roughly
    Previous Trip Eng Oil Temp Engine oil temperature of previous trip When the engine stalls, is difficult to start, or idles roughly
    Ambient Temp for A/C Ambient temperature When the engine stalls, is difficult to start, or idles roughly
    Previous Trip Ambient Temp Ambient temperature of previous trip When the engine stalls, is difficult to start, or idles roughly
    Engine Start Hesitation History of instances of slow engine starts -
    Low Rev for Eng Start History of low engine speed after engine starts -
    Minimum Engine Speed Minimum engine speed When the engine stalls, is difficult to start, or idles roughly
    Tumble C.V Duty Ratio Intake air control valve duty ratio -
    Electric Fan Motor Electric fan motor status -
    Idle Fuel Cut Fuel cut idle ON: When the throttle valve is fully closed and the engine speed is more than 2500 rpm.
    FC TAU Fuel cut during very light load The fuel cut is being performed under a very light load to prevent incomplete engine combustion.
    Immobiliser Fuel Cut Status of the immobiliser fuel cut -
    Communication with ECT Status of the communication with ECT -
    Comm with Power Manage Status of the communication with power management control ECU -
    Comm with Air Conditioner Status of the communication with air conditioning amplifier assembly -
    Electrical Load Signal 1 Electrical load signal -
    Electrical Load Signal 3 Electrical load signal -
    Received MIL from ECT MIL status from ECT -
    Shift Position Sig from ECT Shift position signal from ECT -
    A/T Oil Temp from ECT ATF temperature from ECT -
    SPD (NO) Output shaft speed -
    SPD (NT) Input shaft speed -
    ECT Lock Up ECT lock up status -
    Shift SW Status (P Range) Park/neutral position switch assembly status -
    Shift SW Status (R Range) Park/neutral position switch assembly status -
    Shift SW Status (N Range) Park/neutral position switch assembly status -
    Sports Shift Up SW Sport shift up switch status -
    Sports Shift Down SW Sport shift down switch status -
    Sports Mode Selection SW Sport mode select switch status -
    Shift SW Status (D Range) Park/neutral position switch assembly status -
    Snow or 2nd Start Mode Snow or 2nd start mode status -