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Freeze Frame Data

  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, it can help determine if the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was Lean or Rich, and other data, from the time the malfunction occurred.

      HINT: 

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

    • The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using a Techstream, five separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.
      Fig 1: DTC Timing Chart
      GTY162299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • 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 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 speedometer
    Engine Speed Engine speed -
    Calculate Load Calculated load by ECM -
    Vehicle Load Vehicle load -
    MAF Air flow rate from Mass Air Flow (MAF) meter If value approximately 0.0 gm/sec:
    • MAF meter power source circuit open
    • VG circuit open or short

    If value 271.0 gm/sec or more:
    • E2G circuit open
    Atmosphere Pressure Atmospheric pressure -
    Coolant Temp Engine coolant temperature
    • If -40°C (-40°F): sensor circuit open
    • If 140°C (284°F) or more: sensor circuit shorted
    Intake Air Intake air temperature
    • If -40°C (-40°F): sensor circuit open
    • If 140°C (284°F) or more: sensor circuit shorted
    Ambient Temperature Ambient air temperature -
    Engine Run Time Engine run time -
    Initial Engine Coolant Temp Engine coolant temperature at engine start -
    Initial Intake Air Temp Intake air temperature at engine start -
    Battery Voltage Battery voltage -
    Accel Sens. No. 1 Volt % Absolute Accelerator Pedal Position (APP) No. 1 Read value with ignition switch ON (Do not start engine)
    Accel Sens. No. 2 Volt % Absolute APP No. 2 Read value with ignition switch ON (Do not start engine)
    Throttle Sensor Volt % Throttle position sensor
    • Calculated value based on VTA1
    • Read value with ignition switch ON (Do not start engine)
    Throttle Sensor #2 Volt % Throttle position No. 2 sensor
    • Calculated value based on VTA2
    • Read value with ignition switch ON (Do not start engine)
    Throttle Sensor Position Throttle position
    • Recognition value for throttle opening angle on ECM
    • Read value with ignition switch ON (Do not start engine)
    Throttle Motor DUTY Throttle actuator -
    Throttle Position Throttle valve opening angle Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    ISC Flow Flow rate calculated using information from each sensor Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    ISC Position Requested opening amount calculated using ISC control Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    ISC Feedback Value ISC feedback compensation amount Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    ISC Learning Value ISC learned compensation amount Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Electric Load Feedback Val Compensation flow rate according to electrical load Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Air Conditioner FB Val Compensation flow rate according to air conditioner load Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    PS Feedback Val Compensation flow rate according to power steering load Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Low Revolution Control Low engine speed control operation state Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Neutral Control Neutral control operation state Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    N Range Status Shift lever N status Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Eng Stall Control FB Flow Intake air compensation flow rate Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Deposit Loss Flow Flow loss due to deposits Reference:
    Check the value 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) Quantity of fuel injection volume for 10 times
    Fuel Pump/Speed Status Fuel pump status -
    Vacuum Pump Key-off EVAP system leak detection pump status Refer to EVAP System
    EVAP (Purge) VSV EVAP (PURGE) VSV control duty Order signal from ECM
    Evap Purge Flow Ratio of evaporative purge flow to intake air volume -
    Purge Density Learn Value Learning value of purge density -
    EVAP System Vent Valve Key-off EVAP system vent valve status -
    EVAP Purge VSV Purge VSV status -
    Purge Cut VSV Duty Purge VSV actuate duty -
    Target Air-Fuel Ratio Ratio compared to stoichiometric level -
    AF Lambda B1S1 Short-term fuel trim associated with sensor 1 -
    AFS Voltage B1S1 A/F sensor output voltage for sensor 1 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 voltage output of the sensor.
    AFS Current B1S1 A/F sensor output current for sensor 1 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 voltage output of the sensor.
    A/F Heater Duty #1 A/F heater duty ratio (for Bank 1) -
    O2S B1S2 Heated oxygen sensor output voltage for sensor 2 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 voltage output of the sensor.
    O2S Impedance B1S2 Sub heated oxygen sensor impedance (sensor 2) -
    O2 Heater B1S2 Heated oxygen sensor heater (for Bank 1 Sensor 2) -
    O2 Heater Curr Val B1S2 Heated oxygen sensor current (for Bank 1 Sensor 2) -
    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 continual deviation of short-term fuel trim from central value
    Total FT #1 Total fuel trim value for fuel system -
    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 A/F 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 A/F sensor, used for fuel control malfunctioning
    Fuel System Status #2 Fuel system status bank 2
    IGN Advance Ignition timing advance for No. 1 cylinder -
    Knock Feedback Value Knock feedback value Service data
    Knock Correct Learn Value Knock correction learning value Service data
    Idle Spark Advn Ctrl #1 Individual cylinder timing advance compensation amount (No. 1) Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advn Ctrl #2 Individual cylinder timing advance compensation amount (No. 2) Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advn Ctrl #3 Individual cylinder timing advance compensation amount (No. 3) Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advn Ctrl #4 Individual cylinder timing advance compensation amount (No. 4) Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Actual VVT Angle #1 Actual VVT displacement angle (bank 1) This item is used for freeze frame data only.
    VVT Control Status #1 VVT control #1 status -
    VVT Advance Fail VVT control failure status -
    Catalyst Temp B1S1 Estimated catalyst temperature (sensor 1) -
    Catalyst Temp B1S2 Estimated catalyst temperature (sensor 2) -
    Starter Signal Starter relay (STA) signal status -
    Starter Control Starter switch (STSW) signal status -
    Power Steering Signal Power steering signal status -
    Starter Relay Starter control (STAR) signal status -
    ACC Relay ACC CUT relay status -
    Neutral Position SW Signal PNP switch status -
    Clutch Switch Clutch switch status Clutch switch (upper) signal status for Cruise Control System
    Clutch Start SW Clutch switch status Clutch start switch (lower) signal status for engine cranking
    Stop Light Switch Stop light switch status -
    A/C Signal A/C signal status -
    Closed Throttle Position SW Closed throttle position switch -
    Fuel Cut Condition Fuel cut condition -
    Immobiliser Communication Immobiliser communication OFF: Communication malfunctioning, or engine immobiliser system set
    ON: Communication normal
    TC Terminal TC terminal status -
    Time after DTC Cleared Time after DTC cleared -
    Distance from DTC Cleared Distance traveled since DTCs cleared -
    Warm up Cycle Cleared DTC Warm-up cycle after DTC cleared -
    Dist Batt Cable Disconnect Distance after battery cable disconnected -
    IG OFF Elapsed Time Time after ignition switch off -
    TC and TE1 TC and CG (TE1) terminal of DLC3 -
    Ignition Trig. Count Ignition counter -
    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 -
    Misfire RPM Engine speed when misfire occur -
    Misfire Load Engine load when misfire occur -
    Misfire Margin Margin to detect engine misfire Misfire detecting margin
    Catalyst OT MF F/C Catalyst over temperature misfire prevention F/C -
    Cat OT MF F/C History Catalyst over temperature misfire prevention F/C history -
    Cat OT MF F/C Cylinder #1 Display of fuel cut operation in No. 1 cylinder (if certain level of misfire malfunction is detected) -
    Cat OT MF F/C Cylinder #2 Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected) -
    Cat OT MF F/C Cylinder #3 Display of fuel cut operation in No. 3 cylinder (if certain level of misfire malfunction is detected) -
    Cat OT MF F/C Cylinder #4 Display of fuel cut operation in No. 4 cylinder (if certain level of misfire malfunction is detected) -
    Engine Speed (Starter Off) Engine speed when starter off Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Starter Count Number of times starter turned on after ignition switch turned to ON Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Run Dist of Previous Trip Distance driven during previous trip Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Engine Starting Time Time elapsed after engine started (interval between ignition switch ON and off) Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Previous Trip Coolant Temp Engine coolant temperature during previous trip Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Previous Trip Intake Temp Intake air temperature during previous trip Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Engine Oil Temperature Engine oil temperature (estimated temperature) Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Previous Trip Eng Oil Temp Engine oil temperature during previous trip Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Ambient Temp for A/C Ambient temperature for A/C Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Previous Trip Ambient Temp Ambient temperature during previous trip Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Engine Start Hesitation History of hesitation during engine start Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Low Rev for Eng Start History of low engine speed after engine start Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Minimum Engine Speed Minimum engine speed Reference:
    Check the value when the engine stalls, is difficult to start, or idles roughly
    Fuel Cut Elps Time Elapsed time since Fuel Cut due to high engine speed. The time elapsed after high engine speed has occurred (More than the rpm at which fuel cut occurs + 500 rpm).
    Electric Fan Motor Electric fan motor -
    Idle Fuel Cut Prohibit Idle fuel cut control prohibition status See Active Test item "Control the Idle Fuel Cut Prohibit"
    Idle Fuel Cut Fuel cut idle Idle Fuel Cut = "ON" when throttle valve fully closed and engine speed over 3500 rpm
    FC TAU Fuel cut TAU (Fuel cut during very light load) Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete
    Immobiliser Fuel Cut Status of the immobiliser fuel cut -
    Electrical Load Signal 1 Electrical load signal (ELS terminal input) -
    Electrical Load Signal 2 Electrical load signal (ELS3 terminal input) -
    SPD (NT) Input shaft speed (inside the transaxle) Only for A/T models
    Shift SW Status (P Range) PNP switch status (P Range) Only for A/T models:
    When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
    Shift SW Status (R Range) PNP switch status (R Range) Only for A/T models:
    When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
    Shift SW Status (2 Range) PNP switch status (2nd Range) Only for A/T models:
    When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
    Shift SW Status (L Range) PNP switch status (L Range) Only for A/T models:
    When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
    Shift SW Status (N Range) PNP switch status (N Range) Only for A/T models:
    When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
    Shift SW Status (D Range) PNP switch status (D Range) Only for A/T models:
    When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
    Shift SW Status (3 Range) PNP switch status (3rd Range) Only for A/T models:
    When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
    A/T Oil Temperature 1 No. 1 ATF temperature sensor value If value is -40°C (-40°F) or 215°C (419°F), No. 1 ATF temperature sensor circuit is open or shorted
    Lock Up Transaxle lock-up status -
    ST Solenoid Status Shift Solenoid ST Status -
    Shift Status ECM Gearshift Command -
    SLT Solenoid Status Shift Solenoid SLT Status -
    SLU Solenoid Status Shift Solenoid SLU Status -
    AT Fluid Flex lock-up judder judgment -
    FOR MEXICO MODELS

    Tester Display Measure 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 approximately 0.0 g/sec:
    • Mass air flow meter power source circuit open or short
    • VG circuit open or short

    If 271.0 g/sec or more:
    • E2G circuit open
    Atmosphere Pressure Atmospheric pressure Equivalent to atmospheric pressure
    Coolant Temp Engine coolant temperature If -40°C, sensor circuit open
    If 140°C or more, sensor circuit shorted
    Intake Air Intake air temperature If -40°C, sensor circuit open
    If 140°C or more, sensor circuit shorted
    Engine Run Time Accumulated engine running time -
    Initial Engine Coolant Temp Engine coolant temperature at engine start -
    Initial Intake Air Temp Intake air temperature at engine start -
    Battery Voltage Battery voltage -
    Accel Sens. No. 1 Volt % Absolute Accelerator Pedal Position (APP) No. 1 -
    Accel Sens. No. 2 Volt % Absolute APP No. 2 -
    Throttle Sensor Volt % Throttle sensor positioning -
    Throttle Sensor #2 Volt % Throttle sensor positioning #2 -
    Throttle Sensor Position Throttle position -
    Throttle Motor DUTY Throttle motor -
    Injector (Port) Injection period of No. 1 cylinder -
    Injection Volum (Cylinder1) Injection volume -
    Fuel Pump/Speed Status Fuel pump status -
    Vacuum Pump Key-off EVAP system leak detection pump status Refer to EVAP System
    EVAP (Purge) VSV EVAP purge VSV duty ratio -
    Evap Purge Flow Ratio of evaporative purge flow to intake air volume -
    Purge Density Learn Value Learning value of purge density -
    EVAP System Vent Valve Key-off EVAP system vent valve status -
    EVAP Purge VSV EVAP Purge VSV -
    Target Air-Fuel Ratio Ratio compared to stoichiometric level -
    AF Lambda B1S1 Fuel trim at A/F sensor -
    AFS Voltage B1S1 A/F sensor output Performing Control the Injection Volume or Control the Injection Volume for A/F Sensor function of Active Test enables technician to check output voltage of sensor.
    AFS Current B1S1 A/F sensor output current for sensor 1 Performing Control the Injection Volume or Control the Injection Volume for A/F Sensor function of Active Test enables technician to check output voltage of sensor.
    O2S B1S2 Heated oxygen sensor output Performing Control the Injection Volume or Control the Injection Volume for A/F Sensor function of Active Test enables technician to check output voltage of sensor.
    O2S Impedance B1S2 Sub oxygen sensor impedance (sensor 2) -
    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 -
    Fuel System Status #1 Fuel system status #1
    • OL (Open Loop): Has not yet satisfied conditions to go closed loop
    • CL (Closed Loop): Using A/F 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 A/F sensor, used for fuel control malfunctioning
    Fuel System Status #2 Fuel system status #2
    IGN Advance Ignition advance -
    Knock Feedback Value Feedback value of knocking -
    Knock Correct Learn Value Correction learning value of knocking -
    VVT Control Status #1 VVT control status -
    Catalyst Temp (B1S1) Estimated catalyst temperature (sensor 1) -
    Catalyst Temp (B1S2) Estimated catalyst temperature (sensor 2) -
    Starter Signal Starter switch (STSW) signal status -
    Starter Control Starter control (STAR) signal -
    Power Steering Signal Power steering signal -
    Starter Relay Starter relay (STA) signal -
    Power Steer. Sig. Record Power steering signal (history) Signal status usually ON until ignition switch turned off
    ACC Relay ACC CUT relay status -
    Neutral Position SW Signal Park/Neutral Position (PNP) switch signal status -
    Stop Light Switch Stop light switch status -
    A/C Signal A/C signal status -
    Closed Throttle Position SW Closed throttle position switch -
    Fuel Cut Condition Fuel cut condition ON: Any fuel cut operation executed
    Immobiliser Communication Immobiliser communication OFF: Communication malfunctioning, or engine immobiliser system set ON: Communication normal
    Electrical Load Signal Electrical load signal -
    Time after DTC Cleared Cumulative time after DTC cleared -
    Distance from DTC Cleared Accumulated distance from DTC cleared -
    Warm up Cycle Cleared DTC Warm-up cycle after DTC cleared -
    TC and TE1 TC and CG (TE1) terminals of DLC3 -
    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 All cylinders misfire count -
    Misfire RPM Engine speed when misfire occurred -
    Misfire Load Engine load when misfire occurred -
    Misfire Margin Margin to detect engine misfire -
    Catalyst OT MF F/C Catalyst over temperature Misfire prevention fuel cut -
    Cat OT MF F/C History Catalyst over temperature Misfire prevention fuel cut history: -
    Cat OT MF F/C Cylinder #1 Display of fuel cut operation in No. 1 cylinder (if certain level of misfire malfunction is detected) -
    Cat OT MF F/C Cylinder #2 Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected) -
    Cat OT MF F/C Cylinder #3 Display of fuel cut operation in No. 3 cylinder (if certain level of misfire malfunction is detected) -
    Cat OT MF F/C Cylinder #4 Display of fuel cut operation in No. 4 cylinder (if certain level of misfire malfunction is detected) -
    Electric Fan Motor Electric fan motor -
    Idle Fuel Cut Fuel cut idle ON: when throttle valve fully closed and engine speed over 3500 rpm
    FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete
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