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 intelligent tester, 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 FREEZE FRAME DATA
LABEL (Intelligent Tester Display) Measure Item/Range Diagnostic Note INJECTOR Injection period of No. 1 cylinder - IGN ADVANCE Ignition advance - CALC 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 SPD Engine speed - VEHICLE SPD Vehicle speed Speed indicated on speedometer 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 shortedFUEL PRESS Fuel pressure - AIR-FUEL RATIO Ratio compared to stoichiometric level - AMBIENT TEMP Ambient temperature - PURGE DENSITY 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 CRRT VAL Correction learning value of knocking - KNOCK FBVAL Feedback value of knocking - THROTTLE POS Throttle position Read value with power switch ON (IG) (Do not start engine) THROTTLE POS Throttle sensor positioning Read value with power switch ON (IG) (Do not start engine) THROTTLE POS #2 Throttle sensor positioning #2 - THROTTLE MOT Throttle actuator - O2S B1 S2 Heated oxygen sensor output (bank 1 sensor 2) Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor O2S B2 S2 Heated oxygen sensor output (bank 2 sensor 2) Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor AFS B1 S1 A/F sensor output (bank 1 sensor 1) Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor AFS B2 S1 A/F sensor output (bank 2 sensor 1) Performing INJ VOL or A/F CONTROL 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 carried 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 SYS #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 SYS #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) - CAT TEMP B1 S1 Estimated catalyst temperature (bank 1 sensor 1) - CAT TEMP B2 S1 Estimated catalyst temperature (bank 2 sensor 1) - CAT TEMP B1 S2 Estimated catalyst temperature (bank 1 sensor 2) - CAT TEMP B2 S2 Estimated catalyst temperature (bank 2 sensor 2) - S O2S B1 S2 HO2 sensor impedance (bank 1 sensor 2) - S O2S B2S2 HO2 sensor impedance (bank 2 sensor 2) - INI COOL TEMP Engine coolant temperature at engine start - INI INTAKE TEMP Intake air temperature at engine start - FPRS DF REL VLV Difference between fuel pressure before and after fuel relief valve operates - INJ VOL Injection volume - INJ TIMMING D4 Injection timing (D4) - FUEL PUMP D4 Fuel pump duty (D4) - INJ TIME D4 Injection time (D4) - FP TARGET VAL Target fuel pressure - FP DISCHARGE High pressure fuel pump discharge rate - INJ WAY Injection mode - INJ SWITCHING Prohibition of changing the D-4S injection method - CTP SW Closed throttle position switch - ENG OIL PRES SW Engine oil pressure switch signal Always ON while engine is running FUEL LID Fuel lid courtesy switch status - FUEL LID SW Fuel filler door opener switch status - BATTERY VOLTAGE Battery voltage - ATM PRESSURE Atmospheric pressure - FUEL PMP SP CTL Fuel pump speed control status - VVT CTRL B2 VVT control status (bank 2) - EVAP(Purge)VSV EVAP purge VSV - FUEL PUMP/SPD Fuel pump/speed status - VVT CTRL B1 VVT control status (bank 1) - VACUUM PUMP Key-off EVAP system leak detection pump status - EVAP VENT VAL Key-off EVAP system vent valve status - FAN MOTOR Electric fan motor status - FPRS RELIEF VLV Fuel relief valve status - TC/TE1 TC and TE1 terminals of DLC3 - FUEL FILLER OPN Fuel filler door status - FVCV Fuel vapor-containment valve status - FCIDL Fuel cut idle ON: when throttle valve fully closed and engine speed over 1,500 rpm FCTAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete IGNITION Ignition counter - CYL#1, #2, #3, #4, #5, #6 Cylinder #1, #2, #3, #4, #5, #6 misfire Only displayed during idling CYL ALL All cylinder misfire rate 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 - ENG RUN TIME Accumulated engine running time - TIME DTC CLEAR Cumulative time after DTC cleared - DIST DTC CLEAR Accumulated distance after DTC cleared - WU CYC DTC CLEAR Warm-up cycle after DTC cleared - REQ ENG TRQ Requested engine torque Flag information for hybrid vehicle HV TRGT ENG SPD HV target engine speed Flag information for hybrid vehicle ACT ENGINE TRQ Actual engine torque Flag information for hybrid vehicle EST ENGINE TRQ Estimated engine torque Flag information for hybrid vehicle ENG RUN TIME Engine run time Flag information for hybrid vehicle ENGINE RUN TIME Request engine run time Flag information for hybrid vehicle IGNITION TIME Judgment time for ignition of time Flag information for hybrid vehicle OUTPUT TIME 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 FUEL CUT Fuel cut for engine stop request Flag information for hybrid vehicle INDPNDNT OPR Engine Independent operation Flag information for hybrid vehicle RACING Racing operation Flag information for hybrid vehicle WARM UP Request engine warm up Flag information for hybrid vehicle INDPNDNT CNTRL Engine independently operation Flag information for hybrid vehicle ISC LEARN VAL ISC learning value Flag information for hybrid vehicle