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 from 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.
- 3 data set 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 CHART
LABEL (Techstream Tester Display) Measure Item/Range Diagnostic Note Trouble Code Freeze DTC - Injector (Port) Injector - IGN Advance Ignition advance - Calculate Load Calculate load Calculated load by ECM Vehicle Load Vehicle load - MAF Mass air flow volume If value approximately 0.0 g/s: - Mass air flow meter power source circuit open or short
- VG circuit open or short
If value 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 -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 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 - Accelerator Position No. 1 Absolute Accelerator Pedal Position (APP) No. 1 - Accelerator Position No .2 Absolute APP No. 2 - Throttle Pos. Sensor Output Throttle position Read value with engine switch on (IG) (Do not start engine) Throttle Sensor Position Throttle sensor positioning Read value with engine switch on (IG) (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 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 current 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 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 (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 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
- 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
AF Lambda B1 S1 Fuel trim at A/F 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 current of sensor AF FT B2 S1 Fuel trim at A/F sensor - Catalyst Temp (B1 S1) Catalyst temperature - Catalyst Temp (B2 S1) Catalyst temperature - Catalyst Temp (B1 S2) Catalyst temperature - Catalyst Temp (B2 S2) Catalyst temperature - Sub O2S Impedance B1S2 Heated oxygen sensor impedance (Bank 1) - Sub O2S Impedance B2S2 Heated oxygen sensor impedance (Bank 2) - Initial Engine Coolant Temp Initial engine coolant temperature - Initial Intake Air Temp Initial intake air temperature - Injection Volume (Cylinder 1) Injection volume - Injection Timing (D4) Injection timing (D4) - Fuel Pump Duty (D4) Fuel pump duty (D4) - Injection Time (D4) Injection time (D4) - Fuel Pressure Target Value Target fuel pressure - HP FP Discharge Rate High pressure fuel pump discharge rate (for Bank 1) - Injection Way Injection mode - Injection Switching Status Prohibition of changing the D-4S injection method - High Pres FP Duty High pressure fuel pump duty - ACC Relay ACC relay - Starter Relay Starter relay - Starter Signal Starter signal - Starter Control Starter control - Power Steering Switch Power Steering Signal - Power Steering Signal Power Steering Signal (history) Signal status usually ON until engine switch is turned off Closed Throttle Position SW Closed throttle position switch - A/C Signal A/C signal - Neutral Position SW Signal Neutral position switch signal - Electrical Load Signal Electrical load signal - Stop Light Switch Stop light switch - Engine Oil Pressure SW Engine oil pressure switch signal Always ON while engine is running Immobilizer Communication Immobilizer communication ON or OFF OFF: Communication malfunctioning, or engine immobilizer system set Fuel Cut Condition Fuel-cut condition ON or OFF - Battery Voltage Battery voltage - Atmosphere Pressure Atmospheric pressure - Fuel Pump Speed Control Fuel pump speed control status - VVT Control Status (Bank 2) VVT control status (bank 2) - EVAP Purge VSV EVAP Purge VSV - A/C Magnetic Clutch Relay A/C magnetic clutch relay - 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 - TC and TE1 TC and TE1 terminals of DLC3 - Engine Speed of Cyl #1 Engine rpm during No. 1 cylinder fuel cut Output only when Control the Cylinder#1 Fuel Cut is performed using Active Test Engine Speed of Cyl #2 Engine rpm during No. 2 cylinder fuel cut Output only when Control the Cylinder#2 Fuel Cut is performed using Active Test Engine Speed of Cyl #3 Engine rpm during No. 3 cylinder fuel cut Output only when Control the Cylinder#3 Fuel Cut is performed using Active Test Engine Speed of Cyl #4 Engine rpm during No. 4 cylinder fuel cut Output only when Control the Cylinder#4 Fuel Cut is performed using Active Test Engine Speed of Cyl #5 Engine rpm during No. 5 cylinder fuel cut Output only when Control the Cylinder#5 Fuel Cut is performed using Active Test Engine Speed of Cyl #6 Engine rpm during No. 6 cylinder fuel cut Output only when Control the Cylinder#6 Fuel Cut is performed using Active Test Av Engine Speed of All Cyl Engine rpm during No. 1 to No. 6 cylinder fuel cut Output only when Active Test is performed 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 Ex Hold Lrn Val (Bank 1) VVT exhaust hold duty ratio learning value (bank 1) - VVT Ex Chg Angle (Bank 1) W exhaust change angle (bank 1) - VVT Ex OCV Duty (Bank 1) VVT exhaust OCV duty (bank 1) - VVT Aim Angle (Bank 2) VVT aim angle (bank 2) - VVT Change Angel (Bank 2) VVT change angle (bank 2) - VVT OCV Duty (Bank 2) VVT OCV operation duty (bank 2) - VVT Ex Hold Lrn Val (Bank 2) VVT exhaust hold duty ration learning value (bank 2) - VVT Ex Chg Angle (Bank 2) VVT exhaust change angle (bank 2) - VVT Ex OCV Duty (Bank 2) VVT exhaust OCV duty (bank 2) - Idle Fuel Cut Idle fuel cut ON: when throttle valve fully closed and engine speed over 1,500 rpm FC TAU FC TAU Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete Ignition Ignition - Cylinder #1 Misfire Count Cylinder #1 misfire rate Displayed only during idling Cylinder #2 Misfire Count Cylinder #2 misfire rate Displayed only during idling Cylinder #3 Misfire Count Cylinder #3 misfire rate Displayed only during idling Cylinder #4 Misfire Count Cylinder #4 misfire rate Displayed only during idling Cylinder #5 Misfire Count Cylinder #5 misfire rate Displayed only during idling Cylinder #6 Misfire Count Cylinder #6 misfire rate Displayed only during idling All Cylinders Misfire Count All cylinder misfire rate Displayed only while idling Misfire RPM Misfire RPM - Misfire Load Misfired load - Misfire Margin Misfire monitoring - Catalyst OT MF F/C Catalyst Over Tmp Misfire prevention F/C - Cat OT MF F/C History Catalyst Over Tmp Misfire prevention F/C history - Cat OT MF F/C Cylinder#1 Catalyst Over Tmp Misfire prevention #1 - Cat OT MF F/C Cylinder#2 Catalyst Over Tmp Misfire prevention #2 - Cat OT MF F/C Cylinder#3 Catalyst Over Tmp Misfire prevention #3 - Cat OT MF F/C Cylinder#4 Catalyst Over Tmp Misfire prevention #4 - Cat OT MF F/C Cylinder#5 Catalyst Over Tmp Misfire prevention #5 - Cat OT MF F/C Cylinder#6 Catalyst Over Tmp Misfire prevention #6 - Engine Run Time Accumulated engine running time - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance after DTC cleared - Warmup Cycle Cleard DTC Warm-up cycle after DTC cleared -