SFI SYSTEM (w/ Secondary Air Injection System) FREEZE FRAME DATA


  1. DESCRIPTION

    B007S9DE06

    Freeze frame data records the engine conditions (fuel system information, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, it can help determine if the vehicle was moving or stationary, 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.

    Tech Tips

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

    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 can be checked.


    • 3 data sets from before the DTC was stored

    • 1 data set from when the DTC was stored

    • 1 data set from after the DTC was stored

    These data sets can be used to simulate the condition of the vehicle from 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 Speed indicated on the speedometer.
    Engine Speed Engine speed -
    Calculate Load Calculated load Load calculated by the ECM.
    Vehicle Load Vehicle load -
    MAF Mass air flow volume

    If the value is approximately 0.0 gm/s:


    • Mass air flow meter power source circuit is open.


    • VG circuit is open or shorted.

    If the value is 160.0 gm/s or more:


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

    If the value is -40°C, the sensor circuit is open.

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

    If the value is -40°C, the sensor circuit is open.

    If the value is 140°C, the sensor circuit is shorted.
    Engine Run Time Accumulated engine running time -
    Radiator Coolant Temp Engine coolant (radiator) temperature

    If the value is -40°C, the sensor circuit is open.

    If the value is 140°C, the sensor circuit is shorted.
    Initial Engine Coolant Temp Initial engine coolant temperature -
    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 % Throttle sensor position Read the value with the ignition switch ON (do not start engine).
    Throttle Sensor #2 Volt % Throttle sensor position #2 Read the value with the ignition switch ON (do not start engine).
    Throttle Sensor Position Throttle position Read the value with the ignition switch ON (do not start engine).
    Throttle Motor DUTY Throttle actuator -
    Throttle Position Throttle position For use when engine stall, starting problems or rough idle is present.
    ISC Flow Flow rate calculated using information from each sensor For use when engine stall, starting problems or rough idle is present.
    ISC Position Requested opening amount calculated using ISC control This is the throttle valve opening amount while the engine is idling (the throttle valve opening amount necessary to maintain ISC air flow).
    ISC Feedback Value ISC feedback compensation amount For use when engine stall, starting problems or rough idle is present.
    ISC Learning Value ISC learned compensation amount For use when engine stall, starting problems or rough idle is present.
    Electric Load Feedback Val Compensation flow rate according to electrical load For use when engine stall, starting problems or rough idle is present.
    Air Conditioner FB Val Compensation flow rate according to air conditioner load For use when engine stall, starting problems or rough idle is present.
    PS Feedback Val Compensation flow rate according to power steering load For use when engine stall, starting problems or rough idle is present.
    Low Revolution Control Low engine speed control operation state For use when engine stall, starting problems or rough idle is present.
    N Range Status Shift lever N status For use when engine stall, starting problems or rough idle is present.
    Eng Stall Control FB Flow Intake air compensation flow rate For use when engine stall, starting problems or rough idle is present.
    Injector (Port) Injection period of No. 1 cylinder -
    Injection Volum (Cylinder 1) Injection volume -
    Fuel Pump/Speed Status Fuel pump status -
    Current Fuel Type Status of the current fuel type -
    EVAP (Purge) VSV EVAP purge VSV duty ratio -
    Evap Purge Flow Ratio of evaporative purge flow to intake air volume -
    Purge Density Learn Value Purge density learned value -
    EVAP Purge VSV EVAP purge VSV -
    Purge Cut VSV Duty Purge cut VSV duty -
    Target Air-Fuel Ratio Air-fuel ratio -
    AF Lambda B1S1 Fuel trim at air fuel ratio sensor -
    AFS Voltage B1S1 Air fuel ratio sensor output Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the air fuel ratio sensor.
    AFS Current B1S1 Air fuel ratio sensor current -
    A/F Heater Duty #1 Air fuel ratio sensor heater duty ratio -
    O2S B1S2 Heated oxygen sensor output Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the heated oxygen sensor.
    O2 Heater B1S2 Heated oxygen sensor heater -
    O2 Heater Curr Val B1S2 Heated oxygen sensor current -
    Short FT #1 Short-term fuel trim Short-term fuel compensation is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio.
    Long FT #1 Long-term fuel trim

    • 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.

    • Air fuel ratio feedback leaning is divided up according to the engine operating range (engine speed x load), and separate values are stored for each operating range. "Long FT #1" indicates the learned value for the current operating range. [A/F Learn Value Idle #1], [A/F Learn Value Low #1], [A/F Learn Value Mid1 #1], [A/F Learn Value Mid2 #1] and [A/F Learn Value High #1] indicate the leaned values for the different operating ranges. The learned value that is the same as "Long FT #1" indicates the current engine operating range.
    A/F Learn Value Idle #1 Air-fuel ratio learned value for idling (bank 1) Learning is performed when idling with the engine warmed up (engine coolant temperature is 75°C [167°F] or higher).
    A/F Learn Value Low #1 Air-fuel ratio learned value for low engine loads (bank 1) Learning is performed when driving with the engine warmed up (engine coolant temperature is 75°C [167°F] or higher) and operating in the low load range (when the range of engine loads is divided into four parts).
    A/F Learn Value Mid1 #1 Air-fuel ratio learned value for mid-sized engine loads 1 (bank 1) Learning is performed when driving with the engine warmed up (engine coolant temperature is 75°C [167°F] or higher) and operating in the mid-size load range closer to the low load range (when the range of engine loads is divided into four parts).
    A/F Learn Value Mid2 #1 Air-fuel ratio learned value for mid-sized engine loads 2 (bank 1) Learning is performed when driving with the engine warmed up (engine coolant temperature is 75°C [167°F] or higher) and operating in the mid-size load range closer to the high load range (when the range of engine loads is divided into four parts).
    A/F Learn Value High #1 Air-fuel ratio learned value for high engine loads (bank 1) Learning is performed when driving with the engine warmed up (engine coolant temperature is 75°C [167°F] or higher) and operating in the high load range (when the range of engine loads is divided into four parts).
    Total FT #1 Total fuel trim -
    Fuel System Status #1 Fuel system status (Bank 1)

    • OL (Open Loop): Has not yet satisfied the conditions to go 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) -
    Air pump pressure (Absolute) Air pump pressure -
    Air Pump Pulsation Pressure Air pump pulsation pressure -
    Secondary Air Control VSV Secondary air injection system status -
    2nd Air System Status Secondary air system status -
    AI Test Secondary air injection system operation prohibition -
    IGN Advance Ignition timing advance for No. 1 cylinder -
    Knock Feedback Value Knocking feedback value -
    Knock Correct Learn Value Knocking correction learned value -
    Idle Spark Advn Ctrl #1 Individual cylinder timing advance compensation amount (No. 1) For use when engine stall, starting problems or rough idle is present.
    Idle Spark Advn Ctrl #2 Individual cylinder timing advance compensation amount (No. 2) For use when engine stall, starting problems or rough idle is present.
    Idle Spark Advn Ctrl #3 Individual cylinder timing advance compensation amount (No. 3) For use when engine stall, starting problems or rough idle is present.
    Idle Spark Advn Ctrl #4 Individual cylinder timing advance compensation amount (No. 4) For use when engine stall, starting problems or rough idle is present.
    Actual VVT Angle #1 Actual VVT displacement angle (bank 1) This is only available in Freeze Frame Data.
    VVT Control Status #1 VVT control status -
    VVT Advance Fail VVT control failure status -
    Catalyst Temp B1S1 Catalyst temperature -
    Catalyst Temp B1S2 Catalyst temperature -
    Starter Signal Starter signal -
    Power Steering Signal Power steering signal -
    Power Steer. Sig. Record Power steering signal This signal status usually ON until ignition switch turned to OFF
    Neutral Position SW Signal Park/neutral position switch signal -
    Stop Light Switch Stop light switch -
    A/C Signal A/C signal -
    Closed Throttle Position SW Closed throttle position switch -
    Fuel Cut Condition Fuel cut condition -
    Immobiliser Communication Immobiliser communication -
    Electrical Load Signal Electrical load signal -
    TC Terminal TC terminal status -
    Time after DTC Cleared Cumulative time after DTCs cleared -
    Distance from DTC Cleared Accumulated distance driven after DTCs cleared -
    Warmup Cycle Cleared DTC Warmup cycles after DTCs cleared -
    Dist Batt Cable Disconnect Total distance vehicle driven after battery cable disconnected -
    IG OFF Elapsed Time Cumulative time after ignition switch off -
    TC and TE1 TC and CG (TE1) terminals of DLC3 -
    Total Distance Traveled Total distance traveled -
    Ignition Trig. Count Ignition counter -
    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 -
    All Cylinders Misfire Count Misfire count of all cylinders -
    Misfire RPM Misfire RPM -
    Misfire Load Misfire load -
    Misfire Margin Misfire monitoring -
    Engine Speed (Starter Off) Engine speed when starter off For use when engine stall, starting problems or rough idle is present.
    Starter Count Number of times starter turned on after ignition switch turned to ON For use when engine stall, starting problems or rough idle is present.
    Run Dist of Previous Trip Distance driven during previous trip

    Before 5 seconds elapse after starting the engine, which is DTC P1604 (Startability Malfunction) detection duration, this parameter indicates the distance driven during the previous trip. After 5 seconds elapse after starting the engine, this parameter indicates the distance driven during the current trip calculated from the vehicle speed signal.

    Tech Tips

    Run Dist of Previous Trip in freeze frame data which were present when the startability malfunction occurred (DTC P1604 detected) indicates the distance driven during the previous trip, but in all other cases, such as for the snapshot data of Data List (real-time measurements), or for freeze frame data which were present when the DTCs other than P1604 were detected, the value indicates the distance driven during the current trip.
    Engine Starting Time Time elapsed after engine started (interval between ignition switch ON and off) For use when engine stall, starting problems or rough idle is present.
    Previous Trip Coolant Temp Engine coolant temperature during previous trip For use when engine stall, starting problems or rough idle is present.
    Previous Trip Intake Temp Intake air temperature during previous trip For use when engine stall, starting problems or rough idle is present.
    Engine Oil Temperature Engine oil temperature (estimated temperature) For use when engine stall, starting problems or rough idle is present.
    Previous Trip Eng Oil Temp Engine oil temperature during previous trip For use when engine stall, starting problems or rough idle is present.
    Ambient Temp for A/C Ambient temperature for A/C For use when engine stall, starting problems or rough idle is present.
    Previous Trip Ambient Temp Ambient temperature during previous trip For use when engine stall, starting problems or rough idle is present.
    Engine Start Hesitation History of hesitation during engine start For use when engine stall, starting problems or rough idle is present.
    Low Rev for Eng Start History of low engine speed after engine start For use when engine stall, starting problems or rough idle is present.
    Minimum Engine Speed Minimum engine speed For use when engine stall, starting problems or rough idle is present.
    Fuel Cut Elps Time Time elapsed after engine runs at high speed -
    ACT VSV A/C cut status for Active Test -
    Electric Fan Motor Electric fan motor status -
    Brake Override System Brake override system status -
    Idle Fuel Cut Fuel cut at idle ON: The throttle valve is fully closed and the engine speed is more than 2800 rpm.
    FC TAU Fuel cut during very light load Fuel cut is being performed under a very light load to prevent the engine combustion from becoming incomplete.
    Immobiliser Fuel Cut Status of the immobiliser fuel cut -
    Immobiliser Fuel Cut History Status of the immobiliser fuel cut history -
    Electrical Load Signal 1 Electrical load signal -
    Electrical Load Signal 2 Electrical load signal -
    Electrical Load Signal 3 Electrical load signal -