Freeze Frame Data
- DESCRIPTION
Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, it can help determine if the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was Lean or Rich, and other data from the time the malfunction occurred.
HINT:
If it is impossible to duplicate 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 or Techstream, 5 separate sets of freeze frame data 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.
- LIST OF FREEZE FRAME DATA (Using Intelligent tester) LIST OF FREEZE FRAME DATA (USING INTELLIGENT TESTER)
LABEL (Tester Display) Measurement Item Diagnostic Note Freeze DTC Trouble code - INJECTOR (PORT) Injection period of No. 1 cylinder - IGN ADVANCE Ignition advance - CALC LOAD Calculated load Calculated load by ECM VEHICLE LOAD Vehicle load - MAF Mass air flow volume If approximately 0.0 g/sec: - Mass air flow meter power source circuit open or short
- VG circuit open or short
If 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 -40°C (-40°F), sensor circuit open
If 140°C (284°F) or more, sensor circuit shortedINTAKE AIR Intake air temperature If -40°C (-40°F), sensor circuit open
If 140°C (284°F) or more, sensor circuit shortedSECONDARY AIR Second air system status - AIR-FUEL RATIO Ratio compared to stoichiometric level - PURGE DENSITY Learning value of purge density - EVAP PURGE FLOW Ratio of evaporative purge flow to intake air volume - EVAP PURGE VSV EVAP purge VSV duty ratio - KNOCK CRRT VAL Correction learning value of knocking - KNOCK FB VAL Feedback value of knocking - ACCEL POS #1 Absolute Accelerator Pedal Position (APP) No. 1 - ACCEL POS #2 Absolute APP No. 2 - THROTTLE POS Throttle sensor positioning - THROTTLE POS Throttle position - THROTTLE POS #2 Throttle sensor positioning #2 - THROTTLE MOT Throttle motor - O2S B1 S2
O2S B2 S2Heated oxygen sensor output Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor AFS B1 S1
AFS B2 S1A/F sensor output 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 - TOTAL FT #1 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 a continual deviation of short-term fuel trim from central valve 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 valve FUEL SYS #1 Fuel system status (for 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 used for fuel control, malfunctioning
FUEL SYS #2 Fuel system status (for 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 used for fuel control, malfunctioning
O2FT B1 S2
O2FT B2 S2Fuel trim at heated oxygen sensor - AF FT B1 S1 Fuel trim at A/F sensor - AFS B1 S1 A/F sensor current - AF FT B2 S1 Fuel trim at A/F sensor - CAT TEMP B1S1
CAT TEMP B2S1Estimated catalyst temperature (for Sensor 1) - CAT TEMP B1S2
CAT TEMP B2S2Estimated catalyst temperature (for Sensor 2) - S O2S B1S2
S O2S B2S2Sub heated oxygen sensor impedance (for Sensor 2) - INI COOL TEMP Engine coolant temperature at engine start - INI INTAKE TEMP Intake air temperature at engine start - INJ VOL Injection volume - AIR PMP PRS (A) Air pump pressure - AIR PMP PLS PRS Air pump pulsation pressure - AIR PMP2 PRS (A) Air pump pressure - AIR PMP2 PULSE Air pump pulsation pressure - PWR ST PRESSURE Power steering pressure sensor - ACC RELAY ACC relay status - STARTER RELAY Starter relay status - STARTER SIG Starter switch (STSW) signal - STARTER CONTROL Starter switch status - CTPSW Closed throttle position switch - A/C SIGNAL A/C signal - PNP SW [NSW] Park / Neutral position (PNP) switch signal - ELECT LOAD SIG Electrical load signal - STOP LIGHT SW Stop light switch - IMMOBI COMM Immobiliser communication - FUEL CUT COND Fuel cut condition - BATTERY VOLTAGE Battery voltage - ATM PRESSURE Atmosphere pressure - SECOND AIR VSV Secondary air injection system status - ACIS VSV VSV for Acoustic Control Induction System (ACIS) - ACT VSV A/C cut status for Active Test - VVT CTRL B2 VVT control status - EVAP (Purge) VSV EVAP Purge VSV - FUEL PUMP/SPD Fuel pump/speed status - VVT CTRL B1 VVT control status - VACUUM PUMP Key-off EVAP system leak detection pump status Refer to EVAP SYSTEM EVAP VENT VAL Key-off EVAP system vent valve status - TC/TE1 TC and CG (TE1) terminals of DLC3 - Al STATUS Secondary air injection system operation prohibit - VVTL AIM ANGL #1 VVT aim angle - VVT CHNG ANGL #1 VVT change angle - VVT OCV DUTY B1 VVT OCV operation duty - VVTL AIM ANGL #2 VVT aim angle - VVT CHNG ANGL #2 VVT change angle - VVT OCV DUTY B2 VVT OCV operation duty - FCIDL Fuel cut idle ON: when throttle valve fully closed and engine speed over 3500 rpm FC TAU 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 Cylinder #1 misfire Only displayed during idling CYL#2 Cylinder #2 misfire Only displayed during idling CYL#3 Cylinder #3 misfire Only displayed during idling CYL#4 Cylinder #4 misfire Only displayed during idling CYL#5 Cylinder #5 misfire Only displayed during idling CYL#6 Cylinder #6 misfire Only displayed during idling CYL#7 Cylinder #7 misfire Only displayed during idling CYL#8 Cylinder #8 misfire Only displayed during idling CYL ALL All cylinders misfire Only displayed during idling CYLS Multiple cylinder misfire - MISFIRE RPM Engine speed when misfire occurred - MISFIRE LOAD Engine load when misfire occurred - MISFIRE MARGIN Margin to detect engine misfire - CAT OT MF F/C Catalyst over temperature misfire prevention F/C - CAT OT FC HSTRY Catalyst over temperature misfire prevention F/C history - ENG RUN TIME Accumulated engine running time - TIME DTC CLEAR Cumulative time after DTC cleared - DIST DTC CLEAR Accumulated distance from DTC cleared - WU CYC DTCCLEAR Warm-up cycle after DTC cleared - - LIST OF FREEZE FRAME DATA (Using Techstream) LIST OF FREEZE FRAME DATA (USING TECHSTREAM)
LABEL (Tester Display) Measurement Item Diagnostic Note Injector (Port) Injection period of No. 1 cylinder - IGN Advance Ignition advance - Calculate Load Calculated load Calculated load by ECM Vehicle Load Vehicle load - MAF Mass air flow volume If approximately 0.0 g/sec: - Mass air flow meter power source circuit open or short
- VG circuit open or short
If 160.0 g/sec. or more:- E2G circuit open
Engine Speed Engine speed - Vehicle Speed Vehicle speed Speed indicated on speedometer Coolant Temp Engine coolant temperature If -40°C (-40°F), sensor circuit open
If 140°C (284°F) or more, sensor circuit shortedIntake Air Intake air temperature If -40°C (-40°F), sensor circuit open
If 140°C (284°F) or more, sensor circuit shorted2nd Air System Status Second air system status - Air-Fuel Ratio Ratio compared to stoichiometric level - Purge Density Learn Value Learning value of purge density - Evap Purge Flow Ratio of evaporative purge flow to intake air volume - EVAP (Purge) VSV EVAP purge VSV duty ratio - Knock Correct Learn Value Correction learning value of knocking - Knock Feedback Value Feedback value of knocking - Accelerator Position No.1 Absolute Accelerator Pedal Position (APP) No. 1 - Accelerator Position No.2 Absolute APP No. 2 - Throttle Position Throttle position - Throttle Sensor Position Throttle sensor positioning - Throttle Sensor Position #2 Throttle sensor positioning #2 - Throttle Motor Throttle motor - O2S B1 S2
O2S B2 S2Heated 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
AFS B2 S1A/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 current - Total FT #1 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 a continual deviation of short-term fuel trim from central valve 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 valve Fuel System Status (Bank 1) Fuel system status (for 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 used for fuel control, malfunctioning
Fuel System Status (Bank2) Fuel system status (for 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 used for fuel control, malfunctioning
AF FT B1 S1 Fuel trim at A/F sensor - AFS B1 S1 A/F sensor current - AF FT B2 S1 Fuel trim at A/F sensor - Catalyst Temp (B1 S1)
Catalyst Temp (B2S1)Estimated catalyst temperature (for Sensor 1) - Catalyst Temp (B1 S2)
Catalyst Temp (B2 S2)Estimated catalyst temperature (for Sensor 2) - Sub O2S Impedance B1S2
Sub O2S Impedance B2S2Sub heated oxygen sensor impedance (for Sensor 2) - Initial Engine Coolant Temp Engine coolant temperature at engine start - Initial Intake Air Temp Intake air temperature at engine start - Injection Volume (Cylinder 1) Injection volume - Air pump pressure (absolute) Air pump pressure - Air Pump Pulsation Pressure Air pump pulsation pressure - Air Pump2 Pressure (Absolute) Air pump pressure - Air Pump2 Pulsation Pressure Air pump pulsation pressure - Power Steering Pressure Power steering pressure sensor - ACC Relay ACC relay status - Starter Relay Starter relay status - Starter Signal Starter switch (STSW) signal - Starter Control Starter switch status - Closed Throttle Position SW Closed throttle position switch - A/C Signal A/C signal - Neutral Position SW Signal Park / Neutral position (PNP) switch signal - Electrical Load Signal Electrical load signal - Stop Light Switch Stop light switch - Immobiliser Communication Immobiliser communication - Fuel Cut Condition Fuel cut condition - Battery Voltage Battery voltage - Atmosphere Pressure Atmosphere pressure - Secondary Air Control VSV Secondary air injection system status - ACIS VSV VSV for Acoustic Control Induction System (ACIS) - ACT VSV A/C cut status for Active Test - VVT Control Status (Bank2) VVT control status - EVAP Purge VSV EVAP Purge VSV - Fuel Pump/Speed Status Fuel pump/speed status - VVT Control Status (Bank 1) VVT control status - Vacuum Pump Key-off EVAP system leak detection pump status Refer to EVAP SYSTEM EVAP System Vent Value Key-off EVAP system vent valve status - TC and TE1 TC and CG (TE1) terminals of DLC3 - AI Operation Prohibit Secondary air injection system operation prohibit - VVT Aim Angle (Bank1) VVT aim angle - VVT Change Angle (Bank1) VVT change angle - VVT OCV Duty (Bank1) VVT OCV operation duty - VVT Aim Angle (Bank2) VVT aim angle - VVT Change Angle (Bank2) VVT change angle - VVT OCV Duty (Bank2) VVT OCV operation duty - Idle Fuel Cut Fuel cut idle ON: when throttle valve fully closed and engine speed over 3500 rpm FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete Ignition Ignition counter - Cylinder #1 Misfire Count Cylinder #1 misfire Only displayed during idling Cylinder #2 Misfire Count Cylinder #2 misfire Only displayed during idling Cylinder #3 Misfire Count Cylinder #3 misfire Only displayed during idling Cylinder #4 Misfire Count Cylinder #4 misfire Only displayed during idling Cylinder #5 Misfire Count Cylinder #5 misfire Only displayed during idling Cylinder #6 Misfire Count Cylinder #6 misfire Only displayed during idling Cylinder #7 Misfire Count Cylinder #7 misfire Only displayed during idling Cylinder #8 Misfire Count Cylinder #8 misfire Only displayed during idling All Cylinders Misfire Count All cylinders misfire Only displayed during idling Multi Cylinders Misfire Count Multiple cylinder misfire - Misfire RPM Engine speed when misfire occurred - Misfire Load Engine load when misfire occurred - Misfire Margin Margin to detect engine misfire - Catalyst OT MF F/C Catalyst over temperature misfire prevention F/C - Cat OT MF F/C History Catalyst over temperature misfire prevention F/C history - 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 - Warm-up Cycle Clear DTC Warm-up cycle after DTC cleared -