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 of the cause of the malfunction, and in judging whether it was temporary or not.
- LIST OF FREEZE FRAME DATA ITEM/RANGE AND DIAGNOSTIC NOTE
LABEL (Techstream Display) Measure Item/Range Diagnostic Note Injector (Port) Injection period of No. 1 cylinder - IGN Advance Ignition advance - Calculate Load Calculate load Calculated load by ECM Vehicle Load Vehicle load Load percentage in terms of maximum intake air flow amount MAF Mass air flow volume If value approximately 0.0 g/sec: - Mass air flow meter power source circuit open or short
- VG circuit open or short
If value 160.0 g/sec. or more:- E2G circuit open
Engine Speed Engine speed - Vehicle Speed Vehicle speed Speed indicated on speedometer 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 shortedFuel Press Fuel pressure - Air-Fuel Ratio Ratio compared to stoichiometric level - Ambient Temperature Ambient temperature - Purge Density Learn Value Learning value of purge density - Evap Purge Flow Ratio of evaporative purge flow to intake air volume - EVAP (Purge) VSV Purge VSV duty ratio - Knock Correct Learn Value Correction learning value of knocking - Knock Feedback Value Feedback value of knocking - Throttle Position Throttle position Read value with power switch ON (IG) (Do not start engine) Throttle Sensor Position Throttle sensor positioning Read value with power switch ON (IG) (Do not start engine) Throttle Sensor Position #2 Throttle sensor positioning #2 - Throttle Motor Throttle actuator - O2S B1 S2 Heated oxygen sensor output (bank 1 sensor 2) Performing Injection Volume (Cylinder 1) or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor O2S B2 S2 Heated oxygen sensor output (bank 2 sensor 2) Performing Injection Volume (Cylinder 1) or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor AFS B1 S1 A/F sensor output (bank 1 sensor 1) Performing Injection Volume (Cylinder 1) or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor AFS B2 S1 A/F sensor output (bank 2 sensor 1) Performing Injection Volume (Cylinder 1) or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor AFS B2 S1 A/F sensor current (bank 2 sensor 1) - Total FT #1 Total fuel trim (bank 1) - Total FT #2 Total fuel trim (bank 2) - Short FT #1 Short-term fuel trim (bank 1) Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio Long FT #1 Long-term fuel trim (bank 1) Overall fuel compensation earned out in long-term to compensate a continual deviation of short-term fuel trim from central valve Short FT #2 Short-term fuel trim (bank 2) Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio Long FT #2 Long-term fuel trim (bank 2) Overall fuel compensation carried out in long-term to compensate a continual deviation of short-term fuel trim from central valve Fuel System Status (Bank 1) Fuel system status (bank 1) - OL (Open Loop): Has not yet satisfied conditions to go closed loop
- CL (Closed Loop): Using heated oxygen 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 heated oxygen sensor, which used for fuel control malfunctioning
Fuel System Status (Bank 2) Fuel system status (bank 2) - OL (Open Loop): Has not yet satisfied conditions to go closed loop
- CL (Closed Loop): Using heated oxygen 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 heated oxygen sensor, which used for fuel control malfunctioning
O2FT B1 S2 Fuel trim at heated oxygen sensor (bank 1 sensor 2) - O2FT B2 S2 Fuel trim at heated oxygen sensor (bank 2 sensor 2) - AF FT B1 S1 Fuel trim at A/F sensor (bank 1 sensor 1) - AFS B1 S1 A/F sensor current (bank 1 sensor 1) - AF FT B2 S1 Fuel trim at A/F sensor (bank 2 sensor 1) - Catalyst Temp (B1 S1) Estimated catalyst temperature (bank 1 sensor 1) - Catalyst Temp (B2 S1) Estimated catalyst temperature (bank 2 sensor 1) - Catalyst Temp (B1 S2) Estimated catalyst temperature (bank 1 sensor 2) - Catalyst Temp (B2 S2) Estimated catalyst temperature (bank 2 sensor 2) - Sub O2S Impedance B1 S2 HO2 sensor impedance (bank 1 sensor 2) - Sub O2S Impedance B2 S2 HO2 sensor impedance (bank 2 sensor 2) - Initial Engine Coolant Temp Engine coolant temperature at engine start - Initial Intake Air Temp Intake air temperature at engine start - Injection Volum (Cylinder 1) Injection volume - FPrs diff/ Relief Vlv op Fuel pressure difference between fuel relief valve close and fuel relief valve open - Injection Timing (D4) Injection timing (D4) - Fuel Pump Duty (D4) Fuel pump duty (D4) - Injection Time (D4) Injection time (D4) - Fuel Pressure Target Value Target fuel pressure - HP FP Discharge Rate High pressure fuel pump discharge rate - Injection Way Injection mode - Injection Switching Status Prohibition of changing the D-4S injection method - Closed Throttle Position SW Closed throttle position switch - Engine Oil Pressure SW Engine oil pressure switch signal Always ON while engine is running Fuel Lid Fuel lid courtesy switch status - Fuel Lid Switch Fuel filler door opener switch status - Battery Voltage Battery voltage - Atmosphere Pressure Atmospheric pressure - Fuel Pump Speed Control Fuel pump speed control status - VVT Control Status (Bank 2) VVT control status (bank 2) - EVAP(Purge) / VSV EVAP purge VSV - Fuel Pump/Speed Status Fuel pump/speed status - VVT Control Status (Bank 1) VVT control status (bank 1) - Vacuum Pump Key-off EVAP system leak detection pump status - EVAP System Vent Valve Key-off EVAP system vent valve status - Electric Fan Motor Electric fan motor status - Fuel Pressure Relief Valve Fuel relief valve status - TC and TE1 TC and TE1 terminals of DLC3 - Fuel Filler Opener Fuel filler door status - Tank Close Valve Fuel vapor-containment valve status - VVT Aim Angle (Bank 1) VVT aim angle (bank 1) - VVT Change Angle (Bank 1) VVT change angle (bank 1) - VVT OCV Duty (Bank 1) VVT OCV operation duty (bank 1) - VVT Ex Hold Lrn Val (Bank 1) VVT exhaust hold duty ratio learning value (bank 1) - VVT Ex Chg Angle (Bank 1) VVT exhaust change angle (bank 1) - VVT Ex OCV Duty (Bank 1) VVT exhaust OCV duty (bank 1) - VVT Aim Angle (Bank 2) VVT aim angle (bank 2) - VVT Change Angle (Bank 2) VVT change angle (bank 2) - VVT OCV Duty (Bank 2) VVT OCV operation duty (bank 2) - VVT Ex Hold Lrn Val (Bank 2) VVT exhaust hold duty ratio learning value (bank 2) - VVT Ex Chg Angle (Bank 2) VVT exhaust change angle (bank 2) - VVT Ex OCV Duty (Bank 2) VVT exhaust OCV duty (bank 2) - Idle Fuel Cut Fuel cut idle ON: when throttle valve fully closed and engine speed over 1,500 rpm FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete Ignition Ignition counter - Cylinder #1 Misfire Count Cylinder #1 misfire count Displayed in only idling Cylinder #2 Misfire Count Cylinder #2 misfire count Displayed in only idling Cylinder #3 Misfire Count Cylinder #3 misfire count Displayed in only idling Cylinder #4 Misfire Count Cylinder #4 misfire count Displayed in only idling Cylinder #5 Misfire Count Cylinder #5 misfire count Displayed in only idling Cylinder #6 Misfire Count Cylinder #6 misfire count Displayed in only idling All Cylinders Misfire Count All cylinder misfire count Displayed only while idling Misfire RPM Engine speed when misfire occurred - Misfire Load Engine load when misfire occurred - Misfire Margin Margin to detect engine misfire - Engine Run Time Accumulated engine running time - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance after DTC cleared - Warmup Cycle Cleard DTC Warm-up cycle after DTC cleared - 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 Estimated Engine Torque Estimated 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 Judgment time for ignition of time Flag information for hybrid vehicle Judge Time Engine Output Judgment time for ignition of 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 independently operation Flag information for hybrid vehicle ISC Learning Value ISC learning value Flag information for hybrid vehicle