Freeze Frame Data
WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
- DESCRIPTION
Freeze frame data record 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 replicate the problem even through 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 a 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 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 conditions 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 LIST OF FREEZE FRAME DATA
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 value -40°C (-40°F), sensor circuit open
If value 140°C (284°F) or more, sensor circuit shortedIntake Air Intake air temperature If value -40°C (-40°F), sensor circuit open
If value 140°C(284°F)or more, sensor circuit shortedAir-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 Absolute throttle position - Throttle Sensor Position Throttle sensor positioning - Throttle Sensor Position #2 Absolute throttle sensor positioning #2 - Throttle Motor Throttle actuator - O2S B1 S2 Heated oxygen sensor output voltage 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 voltage 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 voltage 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 voltage 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 fuel trim (bank 1) - Total FT #2 Total fuel trim (bank 2) - 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 l) 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
02FT B1 S2 Fuel trim at heated oxygen sensor - 02FT B2 S2 Fuel 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 - Catalyst Temp (B1 S1) Estimated catalyst temperature (bank 1 sensor 1) - Catalyst Temp (B2 S1) Estimated catalyst temperature (bank 2 sensor 1) - Catalyst Temp (B1 S2) Estimated catalyst temperature (bank 1 sensor 2) - Catalyst Temp (B2 S2) Estimated catalyst temperature (bank 2 sensor 2) - Sub O2S Impedance B1 S2 Sub heated oxygen sensor impedance (bank 1 sensor 2) - Sub O2S Impedance B2 S2 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 Volum (Cylinderl) Injection volume - Starter Signal Starter switch signal - Power Steering Switch Power steering switch - Power Steering Signal Power steering signal (history) - 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 - Battery Voltage Battery voltage - Atmosphere Pressure Atmosphere pressure - Fuel Pump Speed Control Fuel pump speed control 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 (Bankl) VVT control status - Vacuum Pump Key-off EVAP system leak detection pump status Refer to EVAP SYSTEM EVAP System Vent Valve Key-off EVAP system vent valve status - TC and TE1 TC and CG (TE1) terminals of DLC3 - Engine Speed of Cyl #1 Engine speed for cylinder 1 - Engine Speed of Cyl #2 Engine speed for cylinder 2 - Engine Speed of Cyl #3 Engine speed for cylinder 3 - Engine Speed of Cyl #4 Engine speed for cylinder 4 - Engine Speed of Cyl #5 Engine speed for cylinder 5 - Engine Speed of Cyl #6 Engine speed for cylinder 6 - Av Engine Speed of All Cyl Engine speed for all cylinders - VVT Aim Angle (Bankl) VVT aim angle - VVT Change Angle (Bank l) VVT change angle - VVT OCV Duty (Bank l) 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 Rate Cylinder #1 misfire Only displayed during idling Cylinder #2 Misfire Rate Cylinder #2 misfire Only displayed during idling Cylinder #3 Misfire Rate Cylinder #3 misfire Only displayed during idling Cylinder #4 Misfire Rate Cylinder #4 misfire Only displayed during idling Cylinder #5 Misfire Rate Cylinder #5 misfire Only displayed during idling Cylinder #6 Misfire Rate Cylinder #6 misfire Only displayed during idling All Cylinders Misfire Rate All cylinders misfire Only displayed during idling 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 overheat misfire prevention fuel cut function availability
Not Avl or AvailService data Cat OT MF F/C History Catalyst overheat misfire prevention fuel cut function history
ON or OFFService data Cat OT MF F/C Cylinder#1 Display of fuel cut operation in No. 1 cylinder (if certain level of misfire malfunction is detected)
ON or OFF- Cat OT MF F/C Cylinder#2 Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected)
ON or OFF- Cat OT MF F/C Cylinder#3 Display of fuel cut operation in No. 3 cylinder (if certain level of misfire malfunction is detected)
ON or OFF- Cat OT MF F/C Cylinder#4 Display of fuel cut operation in No. 4 cylinder (if certain level of misfire malfunction is detected)
ON or OFF- Cat OT MF F/C Cylinder#5 Display of fuel cut operation in No. 5 cylinder (if certain level of misfire malfunction is detected)
ON or OFF- Cat OT MF F/C Cylinder#6 Display of fuel cut operation in No. 6 cylinder (if certain level of misfire malfunction is detected)
ON or OFF- 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 -