Freeze Frame Data
- 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 running or stopped, 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, 5 separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.
- 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 judging whether it was temporary or not.
- 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 running or stopped, 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.
- LIST OF FREEZE FRAME DATA
Label
(Techstream Display)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 value approximately 0.0 gm/sec: - Mass air flow meter sub-assembly power source circuit open or shorted
- VG circuit open or shorted
If value 271.0 gm/sec or more:- E2G circuit open
Atmosphere Pressure Atmospheric pressure - MAP Intake manifold pressure - Coolant Temp Engine coolant temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (284°F), sensor circuit shortedIntake Air Intake air temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (284°F), sensor circuit shortedEngine Run Time Accumulated engine running time - Initial Engine Coolant Temp Initial engine coolant temperature - Initial Intake Air Temp Initial intake air temperature - Battery Voltage Battery voltage - Throttle Sensor Volt % Throttle position - Throttl Sensor #2 Volt % Throttle sensor positioning #2 - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle actuator - Injector (Port) Fuel injector assembly - Injection Volum (Cylinder 1) Injection volume - Fuel Pump Speed Control Fuel pump speed control status - Fuel Pump/Speed Status Fuel pump/speed status - Vacuum Pump Leak detection pump ON: Operating EVAP (Purge) VSV EVAP purge VSV duty ratio - EVAP Purge Flow Purge flow - Purge Density Learn Value Learning value of purge density - EVAP Vapor Pressure (Wide) Vapor pressure (wide) Pressure inside fuel tank monitored by vapor pressure sensor EVAP System Vent Valve EVAP system vent valve ON: Closed Fuel Filler Opener Fuel filler door status - Fuel Vapor-Containment Valve Fuel vapor-containment valve status - Fuel Lid Fuel lid courtesy switch status - Fuel Lid Switch Fuel filler door opener switch status - EVAP Purge VSV EVAP purge VSV - Purge Cut VSV Duty Purge cut VSV duty - Target Air-Fuel Ratio Target air fuel ratio - AF Lambda B1S1 Fuel trim at air fuel ratio sensor - AF Lambda B2S1 Fuel trim at air fuel ratio sensor - AFS Voltage B1S1 Air fuel ratio 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 air fuel ratio sensor AFS Voltage B2S1 Air fuel ratio 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 air fuel ratio 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 - A/F Heater Duty #2 Air fuel ratio heater duty ratio - 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 heated oxygen sensor O2S B2S2 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 heated oxygen sensor O2S Impedance B1S2 Heated oxygen sensor impedance (Bank 1) - O2S Impedance B2S2 Heated oxygen sensor impedance (Bank 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 B1S2 Heated oxygen sensor current - 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 - Short FT #2 Short-term fuel trim Short-term fuel compensation used to maintain air fuel ratio at stoichiometric air fuel ratio Long FT #2 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 #2 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 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, which used for fuel control malfunctioning
IGN Advance Ignition advance - Knock Feedback Value Feedback value of knocking - Knock Correct Learn Value Correction learning value of knocking - Target EGR Position Target EGR position - EGR Step Position EGR step position - Actual VVT Angle #1 Actual VVT angle (bank 1) - Actual VVT Angle #2 Actual VVT angle (bank 2) - VVT Control Status #1 VVT control status (bank 1) - VVT Control Status #2 VVT control status (bank 2) - Catalyst Temp B1S1 Catalyst temperature - Catalyst Temp B2S1 Catalyst temperature - Catalyst Temp B1S2 Catalyst temperature - Catalyst Temp B2S2 Catalyst temperature - Closed Throttle Position SW Closed throttle position switch - Fuel Cut Condition Fuel cut condition ON or OFF - TC Terminal TC terminal status - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance after DTC cleared - Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared - Dist Batt Cable Disconnect Accumulated distance from battery cable disconnected - IG OFF Elapsed Time Time after power switch off - TC and TE1 TC and TE1 terminals of DLC3 - Ignition Trig. Count Ignition count - 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 cylinder misfire count - Misfire RPM Misfire RPM - Misfire Load Misfired load - Misfire Margin Misfired monitoring - 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 not available - Cat OT MF F/C Cylinder#1 Catalyst over temperature misfire prevention fuel cut history off - Cat OT MF F/C Cylinder#2 Catalyst over temperature misfire prevention fuel cut history off - Cat OT MF F/C Cylinder#3 Catalyst over temperature misfire prevention fuel cut history off - Cat OT MF F/C Cylinder#4 Catalyst over temperature misfire prevention fuel cut history off - Cat OT MF F/C Cylinder#5 Catalyst over temperature misfire prevention fuel cut history off - Cat OT MF F/C Cylinder#6 Catalyst over temperature misfire prevention fuel cut history off - 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 middle 1 load area (Bank 1) - A/F Learn Value Mid2 #1 Air fuel ratio learn value of middle 2 load area (Bank 1) - A/F Learn Value High #1 Air fuel ratio learn value of high load area (Bank 1) - A/F Learn Value Idle #2 Air fuel ratio learn value of idle area (Bank 2) - A/F Learn Value Low #2 Air fuel ratio learn value of low load area (Bank 2) - A/F Learn Value Mid1 #2 Air fuel ratio learn value of middle 1 load area (Bank 2) - A/F Learn Value Mid2 #2 Air fuel ratio learn value of middle 2 load area (Bank 2) - A/F Learn Value High #2 Air fuel ratio learn value of high load area (Bank 2) - Electric Fan Motor Electric fan motor (Cooling fan motor) - Idle Fuel Cut Prohibit Prohibition of fuel cut at idle - Idle Fuel Cut 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 incomplete engine combustion Communication with HV Status of the communication with power management control ECU - Communication with Brake Status of the communication with skid control ECU - Comm with Air Conditioner Status of the communication with air conditioning amplifier assembly - A/F Sensor Determination (worst vale) #1 Worst judgment value of A/F sensor output (Bank 1) - A/F Sensor Determination (worst vale) #2 Worst judgment value of A/F sensor output (Bank 2) - 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) - Engine Speed Fluctuation Avg (worst value) #5 Worst value of average engine speed fluctuation (Cylinder 5) - Engine Speed Fluctuation Avg (worst value) #6 Worst value of average engine speed fluctuation (Cylinder 6) - Requested Engine Torque Requested engine torque Flag information for hybrid vehicle HV Target Engine Speed HV target engine speed Flag information for hybrid vehicle Actual Engine Torque Actual engine torque Flag information for hybrid vehicle Engine Run Time Engine run time Flag information for hybrid vehicle Request Engine Run Time Request engine run time Flag information for hybrid vehicle Judge Time Engine Ignition Judge time for engine ignition Flag information for hybrid vehicle Judge Time Engine Output Judge time for time until engine output Flag information for hybrid vehicle Fuel Level Fuel level Flag information for hybrid vehicle ISC Learning ISC learning Flag information for hybrid vehicle F/C for Engine Stop Req Fuel cut for engine stop request Flag information for hybrid vehicle Engine Independent Engine independent operation Flag information for hybrid vehicle Racing Operation Racing operation Flag information for hybrid vehicle Request Warm-up Request engine warm up Flag information for hybrid vehicle Engine Independent Control Engine independent control operation Flag information for hybrid vehicle ISC Learning Value ISC learning value Flag information for hybrid vehicle