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Home >> Toyota >> 2011 >> Matrix Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2ZR-FE) (Diagnostics - Introduction) >> SFI System >> Freeze Frame Data >> Freeze Frame Data
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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.

      HINT: 

      If it is impossible to replicate 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 the 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
      GTY190298Courtesy 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 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 
    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 Load percentage in terms of maximum intake air flow amount
    MAF Air flow rate from mass air flow meter If value approximately 0.0 gm/sec:
    • Mass air flow meter power source circuit open
    • VG circuit open or short

    If value 271.0 gm/sec or more:
    • E2G circuit open
    Atmosphere Pressure Atmosphere pressure -
    Coolant Temp Engine coolant temperature
    • If value -40°C (-40°F): sensor circuit open
    • If value higher than 135°C (275°F): sensor circuit shorted
    Intake Air Intake air temperature
    • If value -40°C (-40°F): sensor circuit open
    • If value higher than 128°C (262°F): sensor circuit shorted
    Engine Run Time Engine run time -
    Initial Engine Coolant Temp Initial engine coolant temperature Service data
    Initial Intake Air Temp Initial intake air temperature Service data
    Battery Voltage Battery voltage -
    Accel Sens. No. 1 Volt % Accelerator pedal position No. 1 -
    Accel Sens. No. 2 Volt % Accelerator pedal position No. 2 -
    Throttle Sensor Volt % Throttle sensor positioning Recognition value for throttle opening angle on ECM
    Read value with ignition switch ON
    Throttl Sensor #2 Volt % Absolute throttle sensor positioning #2 Recognition value for throttle opening angle on ECM
    Read value with ignition switch ON
    Throttle Sensor Position Throttle sensor positioning Recognition value for throttle opening angle on ECM
    Read value with ignition switch ON
    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 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 Electric load feedback value When the engine stalls, is difficult to start, or idles roughly
    Air Conditioner FB Val Air conditioner 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
    N Range Status*1 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 direction for cylinder 1 -
    Injection Volume (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 -
    EVAP (Purge) VSV EVAP (Purge) VSV control duty Order signal from ECM
    Evap Purge Flow Ratio of evaporative purge flow to intake air volume Service data
    Purge Density Learn Value Learning value of purge density Service data
    EVAP System Vent Valve key-off EVAP system vent valve status -
    EVAP Purge VSV VSV status for EVAP control -
    Purge Cut VSV Duty Purge cut VSV duty -
    Target Air-Fuel Ratio Ratio compared to stoichiometric level -
    AF Lambda B1S1 Short-term fuel trim associated with bank 1 sensor 1 -
    AFS Voltage B1S1 Air fuel ratio sensor output voltage for bank 1 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 sensors
    AFS Current B1S1 Air fuel ratio sensor output current for bank 1 sensor 1 Value becomes higher when fuel-cut executed under high engine speed
    O2S B1S2 Heated oxygen sensor output voltage for bank 1 sensor 2 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 sensors
    O2S Impedance B1S2 Sub heated oxygen sensor impedance (bank 1 sensor 2) -
    O2 Heater B1S2 Heated oxygen sensor heater (bank 1 sensor 2) -
    O2Heater Curr Val B1S2 Heated oxygen sensor current (bank 1 sensor 2) -
    Short FT #1 Short-term fuel trim of bank 1 Short-term fuel compensation used to maintain air fuel ratio at stoichiometric air fuel ratio
    Long FT #1 Long-term fuel trim of bank 1 Overall fuel compensation carried out in long-term to compensate continual deviation of short-term fuel trim from central value
    Total FT #1 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 is 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, witch is used for fuel control, malfunctioning
    IGN Advance Ignition timing advance for cylinder 1 -
    Knock Feedback Value Feedback value of knocking Service data
    Knock Correct Learn Value Correction learning value of knocking Service data
    Idle Spark Advan Ctrl #1 Ignition timing advance value (for No. 1 cylinder) When the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advan Ctrl #2 Ignition timing advance value (for No. 2 cylinder) When the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advan Ctrl #3 Ignition timing advance value (for No. 3 cylinder) When the engine stalls, is difficult to start, or idles roughly
    Idle Spark Advan Ctrl #4 Ignition timing advance value (for No. 4 cylinder) When the engine stalls, is difficult to start, or idles roughly
    VVT Control Status #1 VVT control (bank 1) status -
    VVT Advance Fail Status of VVT advance fail -
    Catalyst Temp B1S1 Catalyst temperature (associated sensor 1) -
    Catalyst Temp B1S2 Catalyst temperature (associated sensor 2) -
    Starter Signal Starter signal -
    Starter Control Starter control -
    Power Steering Signal Power steering switch signal -
    Starter Relay Starter relay -
    ACC Relay ACC relay -
    Neutral Position SW Signal*1 Neutral position switch signal -
    Clutch Switch*2 Clutch switch status -
    Clutch Start SW*2 Clutch start switch status -
    Stop Light Switch Stop light switch status -
    A/C Signal A/C signal -
    Closed Throttle Position SW Closed throttle position switch -
    Fuel Cut Condition Fuel cut condition ON or OFF -
    Immobilizer Communication Immobilizer communication -
    TC Terminal TC terminal status -
    Time after DTC Cleared Time since DTCs cleared -
    Distance from DTC Cleared Distance traveled since DTCs cleared -
    Warm-up Cycle Cleard DTC Warm-up cycles since DTCs cleared Number of warm-up cycles since DTCs cleared
    Dist Batt Cable Disconnect Accumulated distance from battery cable disconnected -
    IG OFF Elapsed Time Cumulative time after ignition switch off -
    TC and TE1 TC and CG (TE1) terminals of DLC3 -
    Ignition Trig. Count Ignition counter to calculated misfire count -
    Cylinder #1 Misfire Count Misfire count for cylinder 1 -
    Cylinder #2 Misfire Count Misfire count for cylinder 2 -
    Cylinder #3 Misfire Count Misfire count for cylinder 3 -
    Cylinder #4 Misfire Count Misfire count for 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 Misfire detection margin
    Catalyst OT MF F/C Catalyst over temperature misfire prevention F/C not available -
    Cat OT MF F/C History Catalyst over temperature misfire prevention F/C history OFF -
    Cat OT MF F/C Cylinder#1 Catalyst over temperature misfire prevention F/C history OFF -
    Cat OT MF F/C Cylinder#2 Catalyst over temperature misfire prevention F/C history OFF -
    Cat OT MF F/C Cylinder#3 Catalyst over temperature misfire prevention F/C history OFF -
    Cat OT MF F/C Cylinder#4 Catalyst over temperature misfire prevention F/C history OFF -
    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 ignition switch turned from off to ON 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 ignition switch ON 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 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
    Fuel Cut Elps Time Elapsed time since fuel cut due to high engine speed -
    A/F Learn Value Idle #1 Air fuel ratio learn value of idle area (bank 1) -
    A/F Learn Value Low #1 Air fuel ratio learn value of low load area (bank 1) -
    A/F Learn Value Mid1 #1 Air fuel ratio learn value of middle1 load area (bank 1) -
    A/F Learn Value Mid2 #1 Air fuel ratio learn value of middle2 load area (bank 1) -
    A/F Learn Value High #1 Air fuel ratio learn value of high load area (bank 1) -
    Electric Fan Motor Electric cooling fan motor -
    Idle Fuel Cut Fuel cut idle Idle Fuel Cut = "ON" when throttle valve fully closed and engine speed over 2500 RPM
    FC TAU FC TAU Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete
    Immobilizer Fuel Cut Status of the immobilizer fuel cut -
    Immobilizer Fuel Cut History Status of the immobilizer fuel cut history -
    Electrical Load Signal 1 Electrical Load Signal -
    Electrical Load Signal 2 Electrical Load Signal -
    A/F Sensor Determination (worst value) #1 Worst judgment value of air fuel ratio sensor output (bank 1) -
    Engine Speed Fluctuation Avg (worst value) #1 Worst value of average engine speed fluctuation (cylinder 1) -
    Engine Speed Fluctuation Avg (worst value) #2 Worst value of average engine speed fluctuation (cylinder 2) -
    Engine Speed Fluctuation Avg (worst value) #3 Worst value of average engine speed fluctuation (cylinder 3) -
    Engine Speed Fluctuation Avg (worst value) #4 Worst value of average engine speed fluctuation (cylinder 4) -

    *1: Automatic transaxle models only

    *2: Manual transaxle models only