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 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.
- 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 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 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.
- LIST OF FREEZE FRAME DATA
LABEL
(Tester Display)Measurement Item Diagnostic Note Vehicle Speed Vehicle speed Speed indicated on speedometer Engine Speed Engine speed - Calculate Load Calculated load Load calculated 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/s: - Mass air flow meter power source circuit open or shorted
- VG circuit open or shorted
If value 160.0 gm/s or more:- E2G circuit open
MAF #1 Mass air flow volume (for Bank 1) - MAF #2 Mass air flow volume (for Bank 2) - Atmosphere Pressure Atmospheric pressure - Coolant Temp Engine coolant temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (258°F), sensor circuit shortedIntake Air Intake air temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (258°F), sensor circuit shortedIntake Air #1 Intake air temperature (for Bank 1) - Intake Air #2 Intake air temperature (for Bank 2) - Engine 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 % Absolute throttle position - Throttle Sensor #2 Volt % Absolute throttle position sensor #2 - Throttle Sensor Position Throttle position sensor - Throttle Motor DUTY Throttle actuator - Fuel Press Fuel pressure - FPrs diff / Relief Vlv op Fuel pressure difference between fuel relief valve closed and fuel relief valve open - Injector (Port) Injector - Injection Volume (Cylinder 1) Injection volume - Fuel Pump Speed Control F/PMP relay status - Fuel Pump/Speed Status Fuel pump speed status - Vacuum Pump Key-off EVAP system pump status - Fuel Pressure Target Value Target fuel pressure - Fuel Pump Duty (D4) Fuel pump duty (D4) - Fuel Pump2 Duty (D4) Fuel pump duty (D4) (bank 2) - High Pres FP Duty High pressure fuel pump duty - HP FP Discharge Rate High pressure fuel pump discharge rate (for Bank 1) - HP FP Discharge Rate 2 High pressure fuel pump discharge rate (for Bank 2) - Injection Way Injection mode - Injection Switching Status Prohibition of changing D-4S injection method - Injection Timing (D4) Injection timing (D4) - Injection Time (D4) Injection time (D4) - EVAP (Purge) VSV EVAP purge VSV duty ratio - EVAP Purge Flow Purge flow - Purge Destiny Learn Value Purge density learned value - EVAP Vapor Pressure (Wide) Fuel tank pressure sensor value - EVAP System Vent Value 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 Purge VSV VSV for EVAP controlled by ECM (ground side duty control) Target Air-Fuel Ratio Air-fuel ratio - AF Lambda B1S1 Fuel trim at A/F sensor - AF Lambda B2S1 Fuel trim at A/F sensor - AFS Voltage B1S1 A/F sensor output voltage 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 sensor AFS Voltage B2S1 A/F sensor output voltage 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 sensor AFS Current B1S1 A/F sensor output current Performing Control the Injection Volume or Control the Injection Volume for A/F sensor function of Active Test enables technician to check current output of sensor AFS Current B2S1 A/F sensor output current Performing Control the Injection Volume or Control the Injection Volume for A/F sensor function of Active Test enables technician to check current output of sensor O2S B1S2 Heated oxygen sensor output voltage 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 sensor O2S B2S2 Heated oxygen sensor output voltage 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 sensor O2S Impedance B1S2 Heated oxygen sensor impedance - O2S Impedance B2S2 Heated oxygen sensor impedance - Short FT #1 Short-term fuel trim (for Bank 1) Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio Long FT #1 Long-term fuel trim (for Bank 1) Overall fuel compensation carried out in long term to compensate for continual deviation of short-term fuel trim from central value Total FT #1 Total fuel trim (for Bank 1) - Short FT #2 Short-term fuel trim (for Bank 2) Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio Long FT #2 Long-term fuel trim (for Bank 2) Overall fuel compensation carried out in long term to compensate for continual deviation of short-term fuel trim from central value Total FT #2 Total fuel trim (for Bank 2) - Fuel System Status #1 Fuel system status (for Bank 1) - OL (Open Loop): Has not yet satisfied conditions to go to 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 used for fuel control is malfunctioning
Fuel System Status #2 Fuel system status (for Bank 2) - OL (Open Loop): Has not yet satisfied conditions to go to 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 used for fuel control is malfunctioning
IGN Advance Ignition advance - Knock Feedback Value Knocking feedback value - Knock Correct Learn Value Knocking correction learned value - ACIS VSV ACIS VSV status - ACIS Motor Duty ACIS motor duty - VVT Change Angle #1 VVT displacement angle (for Bank 1) - VVT Change Angle #2 VVT displacement angle (for Bank 2) - VVT Ex Hold Lrn Val #1 VVT exhaust hold duty ratio learned value (for Bank 1) - VVT Ex Chg Angle #1 VVT exhaust displacement angle (for Bank 1) - VVT Ex OCV Duty #1 VVT exhaust OCV duty (for Bank 1) - VVT Ex Hold Lrn Val #2 VVT exhaust hold duty ratio learned value (for Bank 2) - VVT Ex Chg Angle #2 VVT exhaust displacement angle (for Bank 2) - VVT Ex OCV Duty #2 VVT exhaust OCV duty (for Bank 2) - VVT-iE Aim Angle #1 VVT intake side target angle (for Bank 1) - VVT-iE Aim Angle #2 VVT intake side target angle (for Bank 2) - VVT-iE Mot Direction #1 VVT motor detection (for Bank 1) - VVT-iE Mot Direction #2 VVT motor detection (for Bank 2) - Catalyst Temp B1S1 Catalyst temperature - Catalyst Temp B2S1 Catalyst temperature - Catalyst Temp B1S2 Catalyst temperature - Catalyst Temp B2S2 Catalyst temperature - HC Adsorber Catalyst VSV Hydrocarbon adsorber and catalyst vacuum switching valve output status - Exhaust Temperature B1S1 Exhaust gas temperature sensor No. 1 value - Exhaust Temperature B1S2 Exhaust gas temperature sensor No. 2 value - Exhaust Temperature B2S1 Exhaust gas temperature sensor No. 3 value - Exhaust Temperature B2S2 Exhaust gas temperature sensor No. 4 value - Closed Throttle Position SW Closed throttle position switch - Time after DTC Cleared Cumulative time after DTCs cleared - Distance from DTC Cleared Accumulated distance driven after DTCs cleared - Warmup Cycle Cleared DTC Warmup cycles after DTCs 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 - Cylinder #7 Misfire Count No. 7 cylinder misfire count - Cylinder #8 Misfire Count No. 8 cylinder misfire count - All Cylinders Misfire Count Misfire count of all cylinders - Multi Cylinders Misfire Count Misfire count of multiple cylinders - Misfire RPM Average engine speed when misfire occurred - Misfire Load Average engine load when misfire occurred - Misfire Margin Margin to detect engine misfire - Electric Fan Motor Fan motor status - Idle Fuel Cut Idle fuel cut ON when throttle valve fully closed and engine speed over 1500 rpm FC TAU FC TAU 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 Requested engine run time Flag information for hybrid vehicle Judge Time Engine Ignition Estimated time until starter turnoff Flag information for hybrid vehicle Judge Time Engine Output Estimated time until engine output is available 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 Engine warm up request Flag information for hybrid vehicle Engine Independent Control Engine independent control operation Flag information for hybrid vehicle ISC Learning Value ISC learned value Flag information for hybrid vehicle