LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2012 >> FJ Cruiser RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) (1GR-FE) >> SFI System >> Freeze Frame Data >> Freeze Frame Data
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 output, confirm the freeze frame data.

    • The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the Techstream, 5 separate sets of freeze frame data can be checked.
      Fig 1: Freeze Frame Data Chart
      GTY138169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • 3 data sets before the DTC was stored.
      • 1 data set when the DTC was stored.
      • 1 data set after the DTC was 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 
    Display Item Measurement 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 the mass air flow volume is approximately 0.0 gm/sec.:
    • The mass air flow meter power source circuit is open or short.
    • The VG circuit is open or short.

    If the mass air flow volume is 271.0 gm/sec. or more:
    • The E2G circuit is open.
    Atmosphere Pressure Atmosphere pressure -
    Coolant Temp Engine coolant temperature If the value is -40°C (-40°F): the sensor circuit is open.
    If the value is 135°C (275°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 128°C (262°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 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 sensor positioning -
    Throttle Motor DUTY Throttle actuator -
    Throttle Position Throttle position Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    ISC Flow Flow rate calculated using information from each sensor Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    ISC Position Requested opening amount calculated using ISC control Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    ISC Feedback Value ISC feedback compensation amount Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    ISC Learning Value ISC learned compensation amount Reference:
    Check the value when 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 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 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 engine stalls, is difficult to start, or idles roughly.
    Low Revolution Control Low engine speed control operation state Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Neutral Control Neutral control operation state Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    N Range Status*1 Shift lever N status Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Eng Stall Control FB Flow Intake air compensation flow rate Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Deposit Loss Flow Flow loss due to deposits Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Injector (Port) Injection period of No. 1 cylinder -
    Injection Volume (Cylinder 1) Injection volume -
    Fuel Pump/Speed Status Fuel pump/speed status -
    Vacuum Pump Key-off EVAP system leak detection pump status Refer to the EVAP System. Refer to EVAP System
    Current Fuel Type Current fuel type Identifying the current fuel type:
    Gasoline
    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 Value Key-off EVAP system vent valve status -
    EVAP Purge VSV EVAP Purge VSV -
    Purge Cut VSV Duty Purge cut VSV duty -
    Target Air-Fuel Ratio Ratio compared to stoichiometric level -
    AF Lambda B1S1 Fuel trim at air fuel ratio sensor -
    AF Lambda B2S1 Fuel trim at air fuel ratio sensor -
    AFS Voltage B1S1
    AFS Voltage B2S1    		 A/F 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 sensor.
    AFS Current B1S1 Air fuel ratio sensor current -
    AFS Current B2S1 Air fuel ratio sensor current -
    A/F Heater Duty #1 Air fuel ratio heater duty ratio (for Bank 1) -
    A/F Heater Duty #2 Air fuel ratio heater duty ratio (for Bank 2) -
    O2S B1S2
    O2S B2S2    		 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 sensor.
    O2S Impedance B1S2
    O2S Impedance B2S2    		 Sub heated oxygen sensor impedance (for Sensor 2) -
    O2 Heater B1S2 Heated oxygen sensor heater -
    O2 Heater B2S2 Heated oxygen sensor heater -
    O2 Heater Curr Val B1S2 Heated oxygen sensor current -
    O2 Heater Curr Val B2S2 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.
    Total FT #1 Total fuel trim -
    Short FT #2 Short-term fuel trim Short-term fuel compensation is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio.
    Long FT #2 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.
    Total FT #2 Total fuel trim -
    Fuel System Status #1 Fuel system status (for 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 (for Bank 2)
    • 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.
    IGN Advance Ignition advance -
    Knock Feedback Value Feedback value of knocking -
    Knock Correct Learn Value Correction learning value of knocking -
    Idle Spark Advn Ctrl #1 Individual cylinder timing advance compensation amount (No. 1) Reference:
    Check the value when 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 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 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 engine stalls, is difficult to start, or idles roughly.
    Idle Spark Advn Ctrl #5 Individual cylinder timing advance compensation amount (No. 5) Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Idle Spark Advn Ctrl #6 Individual cylinder timing advance compensation amount (No. 6) Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Actual VVT Angle #1 Actual VVT displacement angle (for Bank 1) -
    Actual VVT Angle #2 Actual VVT displacement angle (for Bank 2) -
    Actual VVT Ex Angle #1 Actual exhaust VVT displacement angle (for Bank 1) -
    Actual VVT Ex Angle #2 Actual exhaust VVT displacement angle (for Bank 2) -
    VVT Control Status #1 VVT control status -
    VVT Control Status #2 VVT control status -
    VVT Advance Fail VVT control failure status -
    Catalyst Temp B1S1
    Catalyst Temp B2S1    		 Estimated catalyst temperature (for Sensor 1) -
    Catalyst Temp B1S2
    Catalyst Temp B2S2    		 Estimated catalyst temperature (for Sensor 2) -
    Starter Signal Starter switch (STSW) signal -
    Power Steering Signal Power steering oil pressure switch (sensor) status -
    Neutral Position SW Signal*1 Park/Neutral position (PNP) switch signal -
    Clutch Switch*2 Clutch Switch -
    Transfer Neutral*1 Transfer neutral status -
    4WD SW 4WD switch status -
    Transfer L4*1 Transfer L4 switch status -
    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 -
    Immobilizer Communication Immobilizer communication -
    TC Terminal TC terminal status -
    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 -
    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 -
    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 -
    Cylinder #5 Misfire Count Cylinder #5 misfire count -
    Cylinder #6 Misfire Count Cylinder #6 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 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 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 Cylinde r#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) -
    Cat OT MF F/C Cylinder #5 Display of fuel cut operation in No. 5 cylinder (if certain level of misfire malfunction is detected) -
    Cat OT MF F/C Cylinder #6 Display of fuel cut operation in No. 6 cylinder (if certain level of misfire malfunction is detected) -
    Engine Speed (Starter Off) Engine speed when starter off Reference:
    Check the value when 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 engine stalls, is difficult to start, or idles roughly.
    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.
    HINT:
    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) Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Previous Trip Coolant Temp Engine coolant temperature during previous trip Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Previous Trip Intake Temp Intake air temperature during previous trip Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Engine Oil Temperature Engine oil temperature (estimated temperature) Reference:
    Check the value when 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 engine stalls, is difficult to start, or idles roughly.
    Ambient Temp for A/C Ambient temperature Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Previous Trip Ambient Temp Ambient temperature during previous trip Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    Engine Start Hesitation History of hesitation during engine start Reference:
    Check the value when 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 engine stalls, is difficult to start, or idles roughly.
    Minimum Engine Speed Minimum engine speed Reference:
    Check the value when engine stalls, is difficult to start, or idles roughly.
    A/F Learn Value Idle #1 Air fuel ratio value area of idle (for Bank1) -
    A/F Learn Value Low #1 Air fuel ratio value area of low load (for Bank1) -
    A/F Learn Value Mid1 #1 Air fuel ratio value area of middle load 1 (for Bank1) -
    A/F Learn Value Mid2 #1 Air fuel ratio value area of middle load 2 (for Bank1) -
    A/F Learn Value High #1 Air fuel ratio value area of high load (for Bank1) -
    A/F Learn Value Idle #2 Air fuel ratio value area of idle (for Bank2) -
    A/F Learn Value Low #2 Air fuel ratio value area of middle load 1 (for Bank2) -
    A/F Learn Value Mid1 #2 Air fuel ratio value area of middle load 1 (for Bank1) -
    A/F Learn Value Mid2 #2 Air fuel ratio value area of middle load 2 (for Bank2) -
    A/F Learn Value High #2 Air fuel ratio value area of high load (for Bank2) -
    Power Steering Pressure Power steering oil pressure switch (sensor) -
    ACT VSV A/C cut status for Active Test -
    Idle Fuel Cut Fuel cut idle ON: when the throttle valve is fully closed and the engine speed is more than 3500 RPM.
    FC TAU Fuel cut during very light load Fuel cut being performed under a very light load to prevent the engine combustion from becoming incomplete.
    Immobilizer Fuel Cut Status of the immobilizer fuel cut -
    Immobilizer Fuel Cut History Immobilizer fuel cut history -
    Electrical Load Signal 1 Electrical load signal -
    Electrical Load Signal 2 Electrical load signal -
    SPD (NT)*1 Input shaft speed Data is displayed in increments of 50 RPM.
    SPD (SP2)*1 Output shaft speed -

    *1: for Automatic Transmission Models

    *2: for Manual Transmission Models

scientia non olet · About LEMON Manuals