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.
- 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 Load percentage in terms of maximum intake air flow amount MAF Mass air flow volume If value approximately 0.0 gm/sec.: - Mass air flow meter 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 - 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 shortedAmbient Temperature Ambient temperature - 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 - Throttle Sensor Volt % Throttle position Read value with power switch on (IG) (Do not start engine) Throttle Sensor #2 Volt % Throttle sensor positioning #2 - Throttle Sensor Position Throttle sensor positioning Read value with power switch on (IG) (Do not start engine) Throttle Motor DUTY Throttle actuator - Fuel Press Fuel pressure - FPrs diff / Relief Vlv op Fuel pressure difference between fuel relief valve close and fuel relief valve open - Injector (Port) Injection period of No. 1 cylinder - Injection Volum (Cylinder1) Injection volume - Fuel Pump Speed Control Fuel pump speed control status - Fuel Pump/Speed Status Fuel pump/speed status - Vacuum Pump Key-off EVAP system leak detection pump status - Fuel Pressure Target Value Target fuel pressure - Fuel Pump Duty (D4) Fuel pump duty (D4) - 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 - Injection Timing (D4) Injection timing (D4) - Injection Time (D4) Injection time (D4) - EVAP (Purge) VSV 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 Vapor Pressure (Wide) Fuel tank pressure sensor value - EVAP System Vent Valve Key-off EVAP system vent valve status - Fuel Pressure Relief Valve Fuel relief valve status - 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 - Target Air-Fuel Ratio Ratio compared to stoichiometric level - AF Lambda B1S1 Fuel trim at A/F sensor (Bank 1 sensor 1) - AF Lambda B2S1 Fuel trim at A/F sensor (Bank 2 sensor 1) - AFS Voltage B1S1 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 Voltage B2S1 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 Current B1S1 A/F sensor current (Bank 1 sensor 1) - AFS Current B2S1 A/F sensor current (Bank 2 sensor 1) - O2S B1S2 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 B2S2 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 O2S Impedance B1S2 HO2 sensor impedance (Bank 1 sensor 2) - O2S Impedance B2S2 HO2 sensor impedance (Bank 2 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 - 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 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, 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 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, 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 - VVT Control Status #1 VVT control status (Bank 1) - VVT Control Status #2 VVT control status (Bank 2) - Catalyst Temp B1S1 Estimated catalyst temperature (Bank 1 sensor 1) - Catalyst Temp B2S1 Estimated catalyst temperature (Bank 2 sensor 1) - Catalyst Temp B1S2 Estimated catalyst temperature (Bank 1 sensor 2) - Catalyst Temp B2S2 Estimated catalyst temperature (Bank 2 sensor 2) - Closed Throttle Position SW Closed throttle position switch - Engine Oil Pressure SW Engine oil pressure switch signal Always ON while engine is running 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 - TC and TE1 TC and TE1 terminals of DLC3 - Ignition Trig. Count Ignition counter - Cylinder #1 Misfire Count No. 1 cylinder misfire count - Cylinder #2 Misfire Count No. 2 cylinder misfire count - Cylinder #3 Misfire Count No. 3 cylinder misfire count - Cylinder #4 Misfire Count No. 4 cylinder misfire count - Cylinder #5 Misfire Count No. 5 cylinder misfire count - Cylinder #6 Misfire Count No. 6 cylinder misfire count - All Cylinders Misfire Count All cylinder misfire count - Misfire RPM Engine speed when misfire occurred - Misfire Load Engine load when misfire occurred - Electric Fan Motor Electric fan motor status - Idle Fuel Cut Fuel cut idle ON: When throttle valve fully closed and engine speed over 1500 rpm FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete 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 Flag information for hybrid vehicle Judge Time Engine Output Judgment time for 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 independently control operation Flag information for hybrid vehicle ISC Learning Value ISC learning value Flag information for hybrid vehicle