Freeze Frame Data [10/2013 - ]
- 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, 5 separate sets of freeze frame data can be checked.
- 3 data sets before the DTC was stored.
- 1 data set when the DTC was stored.
- 1 data set after the DTC was stored.
- These data sets can be used to simulate the condition of the vehicle around the time of the occurrence 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 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.
- PENDING FREEZE FRAME DATA
HINT:
Pending freeze frame data is stored when a 2 trip DTC is first detected during the first trip.
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Select a DTC in order to display its pending freeze frame data.
HINT:
- Pending freeze frame data is cleared when any of the following occurs.
- Using the Techstream, the DTCs cleared.
- The cable is disconnected from the negative (-) auxiliary battery terminal.
- 40 trips with the engine fully warmed up have been performed after returning to normal. (Pending freeze frame data will not be cleared by only returning the system to normal.)
- With previous pending freeze frame data stored, if pending freeze frame data is newly stored when a 2 trip DTC is detected in the first trip, the old freeze frame data will be replaced with the new one of the newly detected DTC in the next trip.
- Pending freeze frame data is cleared when any of the following occurs.
- LIST OF FREEZE FRAME DATA
Tester Display Measurement Item Diagnostic Note Vehicle Speed Vehicle speed Speed indicated on speedometer Engine Speed Engine speed - Calculate Load Calculated load by ECM - Vehicle Load Vehicle load Load percentage in terms of maximum intake air flow amount MAF Air flow rate from mass air flow meter sub-assembly If value approximately 0.0 gm/sec: - Mass air flow meter sub-assembly power source circuit open
- VG circuit open or short
If value 271.0 gm/sec or more:- E2G circuit open
Atmosphere Pressure Atmosphere pressure - MAP Intake manifold pressure - Coolant Temp Engine coolant temperature - If value -40°C (-40°F): sensor circuit open
- If value more than 135°C (275°F): sensor circuit shorted
Intake Air Intake air temperature - If value -40°C (-40°F): sensor circuit open
- If value more than 128°C (262°F): sensor circuit shorted
Engine Run Time Engine run time - Initial Engine Coolant Temp Initial engine coolant temperature - Coolant Temp Variation after Waterpump Start Engine coolant temperature variation after engine water pump started - Initial Intake Air Temp Initial intake air temperature - Intake Air Temp Variation after Engine Start Intake air temperature variation after engine started - Battery Voltage Auxiliary battery voltage - Throttle Sensor Volt % Absolute throttle position sensor No. 1 - Throttl Sensor #2 Volt % Throttle sensor position No. 2 - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle actuator - Injector (Port) Injection direction for cylinder 1 - Injection Volum (Cylinder1) Injection volume (Cylinder 1) Quantity of fuel injection volume for 10 times Fuel Pump/Speed Status Fuel pump status - Vacuum Pump Key-off EVAP system leak detection pump status - EVAP (Purge) VSV Purge VSV control duty ratio Order signal from ECM EVAP Purge Flow Ratio of evaporative purge flow to intake air volume - Purge Density Learn Value Learning value of purge density - EVAP System Vent Valve Key-off EVAP system vent valve status - EVAP Purge VSV Purge VSV status for EVAP control - Purge Cut VSV Duty Purge VSV duty - Target Air-Fuel Ratio Ratio compared to stoichiometric level - AF Lambda B1S1 Short-term fuel trim associated with bank 1 sensor 1 - AFS Voltage B1S1 Air fuel ratio sensor output voltage for bank 1 sensor 1 - AFS Current B1S1 Air fuel ratio sensor output current for bank 1 sensor 1 Value becomes higher when fuel-cut executed under high engine speed A/F Heater Duty #1 Air fuel ratio sensor heater duty ratio - O2S B1S2 Heated oxygen sensor output voltage for bank 1 sensor 2 - O2S Impedance B1S2 Heated oxygen sensor impedance (bank 1 sensor 2) - O2 Heater B1S2 Heated oxygen sensor heater operation - O2 Heater Curr Val B1S2 Heated oxygen sensor heater current - Short FT #1 Short-term fuel trim of bank 1 Short-term fuel compensation used to maintain air fuel ratio at stoichiometric air fuel ratio Long FT #1 Long-term fuel trim of bank 1 Overall fuel compensation carried out in long-term to compensate continual deviation of short-term fuel trim from central value Total FT #1 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 is used for fuel control, malfunctioning
Fuel System Status #2 Fuel system status (bank 2) (Unused) - IGN Advance Ignition timing advance for cylinder 1 - 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) - VVT Control Status #1 VVT control (bank 1) status - Catalyst Temp B1S1 Catalyst temperature (associated sensor 1) - Catalyst Temp B1S2 Catalyst temperature (associated sensor 2) - Closed Throttle Position SW Closed throttle position switch - Fuel Cut Condition Fuel cut condition - TC Terminal TC terminal status - Time after DTC Cleared Time since DTCs cleared - Distance from DTC Cleared Distance traveled since DTCs cleared - Warmup Cycle Cleared DTC Warm-up cycles since DTCs cleared Number of warm-up cycles since DTCs cleared Dist Batt Cable Disconnect Accumulated distance from auxiliary battery cable disconnected - IG OFF Elapsed Time Cumulative time after power switch off - TC and TE1 TC and CG (TE1) terminals of DLC3 - Ignition Trig. Count Ignition counter - Cylinder #1 Misfire Count Misfire count for cylinder 1 - Cylinder #2 Misfire Count Misfire count for cylinder 2 - Cylinder #3 Misfire Count Misfire count for cylinder 3 - Cylinder #4 Misfire Count Misfire count for cylinder 4 - All Cylinders Misfire Count All cylinders misfire count - Misfire RPM Average engine speed for first misfire range - Misfire Load Average engine load for first misfire range - Misfire Margin Misfired monitoring - 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) - Electric Fan Motor Electric cooling fan motor - Idle Fuel Cut Fuel cut idle - FC TAU Fuel cut during very light road Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete 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 air fuel ratio sensor output (Bank 1) - 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) - Sports Mode Switch Pattern select switch - 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 Judgment time for engine ignition Flag information for hybrid vehicle Judge Time Engine Output Judgment time for time until engine output Flag information for hybrid vehicle Fuel Level Fuel Level Flag information for hybrid vehicle ISC Learning Idle speed control 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 Elec Water Pump Target Spd Engine water pump assembly target speed - Elec Water Pump Spd Engine water pump assembly speed - ISC Learning Value Idle speed control learning value Flag information for hybrid vehicle