Freeze Frame Data
- DESCRIPTION
The ECM (Included in HV control ECU) 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.
The Techstream displays freeze frame data recorded at five different points: 1) 3 times before the DTC is set, 2) once when the DTC is set, and 3) once after the DTC is set. The data can be used to simulate the vehicle's condition around the time of the malfunction. The data may be helpful in determining the cause of a malfunction. It may also be helpful in determining whether a DTC is being caused by a temporary malfunction. The ECM records engine conditions in the form of freeze frame data every 0.5 seconds.
Using Techstream, five separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.
- LIST OF FREEZE FRAME DATA FREEZE FRAME DATA CHART
LABEL (Techstream Display) Measurement Item/Range Diagnostic Note Trouble Code Injection period of No.1 cylinder - Injector (Port) Injection period of No. 1 cylinder - IGN Advance Ignition advance - Calculate Load Calculate load Calculated load by ECM (Included in HV control ECU) Vehicle Load Vehicle load - MAF Mass airflow volume If value is approximately 0.0 g/s: - Mass air flow meter power source circuit open or shorted
- VG circuit open or shorted
If value is 160.0 g/s or more:- E2G circuit open
Engine Speed Engine speed - Vehicle Speed Vehicle speed Speed indicated on speedometer Coolant Temp Engine coolant temperature If value is -40°C (-40°F), sensor circuit open
If value is 140°C (284°F), sensor circuit shortedIntake Air Intake air temperature If value is -40°C (-40°F), sensor circuit open
If value is 140°C (284°F), sensor circuit shortedAir-Fuel Ratio Air-fuel ratio - Ambient Temperature Ambient temperature - Purge Density Learn Value Learning value of purge density - Evap Purge Flow Purge flow - EVAP (Purge) VSV EVAP purge VSV duty ratio - Knock Correct Learn Value Correction learning value of knocking - Knock Feedback Value Feedback value of knocking - Throttle Pos. Sensor Output Throttle position Read value with ignition switch on (Do not start engine) Throttle Sensor Position Throttle sensor positioning Read value with ignition switch on (Do not start engine) Throttle Sensor Position #2 Throttle sensor positioning #2 - Throttle Motor Duty Throttle motor - O2S B1 S2 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 sensor O2S B2 S2 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 sensor AFS B1 S1 A/F 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 sensor AFS B2 S1 A/F 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 sensor Total FT #1 Total fuel trim - Total FT #2 Total fuel trim - 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 for a continual deviation of short-term fuel trim from central value 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 for a continual deviation of short-term fuel trim from central value 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
- OL DRIVE: Open loop due to driving conditions (fuel enrichment)
- OL FAULT: Open loop due to detected system fault
- CL FAULT: Closed loop but heated oxygen sensor, which is 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
- OL DRIVE: Open loop due to driving conditions (fuel enrichment)
- OL FAULT: Open loop due to detected system fault
- CL FAULT: Closed loop but heated oxygen sensor, which is used for fuel control, malfunctioning
AF Lambda B1 S1 Fuel trim at A/F sensor - AF FT B2 S1 Fuel trim at A/F sensor Performing Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor Catalyst Temp (B1 S1) Catalyst temperature - Catalyst Temp (B2S1) Catalyst temperature - Catalyst Temp (B1 S2) Catalyst temperature - Catalyst Temp (B2 S2) Catalyst temperature - Sub O2S Impedance B1S2 Sub heated oxygen sensor impedance (bank 1 sensor 2) - Sub O2S Impedance B2S2 Sub heated oxygen sensor impedance (bank 2 sensor 2) - Initial Engine Coolant Temp Initial engine coolant temperature - Initial Intake Air Temp Initial intake air temperature - Injection Volume (Cylinder 1) Injection volume - EGR Close Lrn. Status EGR Close Lrn. Status - Starter Control Starter control (STAR) signal - Power Steering Switch Power steering signal - Power Steering Signal Power steering signal (history) Signal status usually ON until ignition switch is turned off Battery Voltage Battery voltage - Atmosphere Pressure Atmospheric pressure - 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 Vacuum pump ON: Operate EVAP System Vent Valve EVAP system vent valve ON: Close Electric Fan Motor Electric fan motor ON: Operate TC and TE1 TC and TE1 terminals of DLC3 - Fuel Filler Opener Fuel filler opener ON: Open Tank Close Valve Fuel vapor-containment valve ON: Open 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 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) - Ignition Ignition - Cylinder #1 Misfire Count Cylinder #1 misfire Count Displayed only during idling Cylinder #2 Misfire Count Cylinder #2 misfire Count Displayed only during idling Cylinder #3 Misfire Count Cylinder #3 misfire Count Displayed only during idling Cylinder #4 Misfire Count Cylinder #4 misfire Count Displayed only during idling Cylinder #5 Misfire Count Cylinder #5 misfire Count Displayed only during idling Cylinder #6 Misfire Count Cylinder #6 misfire Count Displayed only during idling ALL Cylinder Misfire Count All cylinder misfire Count Displayed only during idling Misfire RPM Misfire RPM - Misfire Load Misfired load - Misfire Margin Misfire monitoring - Engine Run Time Accumulated engine running time - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance from DTC cleared - Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared - Requested Engine Torque Requested engine torque - HV Target Engine Speed HV target engine speed - Actual Engine Torque Actual engine torque - Estimated Engine Torque Estimated engine torque - Engine Run Time Engine run time - Request Engine Run Time Request engine run time - Judge Time Engine Ignition Judge time engine ignition - Judge Time Engine Output Judge time engine output - Fuel Level Fuel level - ISC Learning ISC learning - F/C for Engine Stop Req Fuel cut for engine stop request - Engine Independent Engine Independent operation - Racing Operation Racing operation - Request Warm-up Request warm-up - Engine Independent Control Engine independent control - ISC Learning Value ISC learning control -