Freeze Frame Data
WARNING: This page is about a different car, the 2009 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
- 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 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, 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 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 LIST OF FREEZE FRAME DATA
LABEL (Techstream Display) Measurement Item/Range Diagnostic Note 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/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 Speed Engine speed - Vehicle Speed Vehicle speed Speed indicated on speedometer Coolant Temp Engine coolant temperature If value -40°C, sensor circuit open
If value 140°C, sensor circuit shortedIntake Air Intake air temperature If value -40°C, sensor circuit open
If value 140°C, sensor circuit shortedAir-Fuel Ratio Air-fuel ratio - Purge Density Learn Value Learning value of purge density - Evap Purge Flow Purge flow - EVAP (Purge) VSV EVAP purge VSV duty ratio - EVAP Vapor Pressure EVAP vapor pressure - Knock Correct Learn Value Correction learning value of knocking - Knock Feedback Value Feedback value of knocking - Accelerator Position No. 1 Absolute No. 1 Accelerator Pedal Position (APP) - Accelerator Position No. 2 Absolute No. 2 APP - Throttle Position Throttle position Read value with ignition switch ON (Do not start engine) Throttle Sensor Position Throttle sensor position Read value with ignition switch ON (Do not start engine) Throttle Sensor Position #2 Throttle sensor position #2 - Throttle Motor 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 voltage output 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 voltage output of sensor Total FT #1 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 value 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
O2FT B1 S2 Fuel trim at heated oxygen sensor - AF FT B1 S1 Fuel trim at A/F sensor - Catalyst Temp (B1 S1) Catalyst temperature - Catalyst Temp (B1 S2) Catalyst temperature - Initial Engine Coolant Temp Initial engine coolant temperature - Initial Intake Air Temp Initial intake air temperature - Injection Volum (Cylinder 1) Injection volume - Air pump pressure (absolute) Air pump pressure (See DTC P2440 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN BANK 1; DTC P2441 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK CLOSE BANK 1 ) Air Pump Pulsation Pressure Air pump pulsation pressure (See DTC P2440 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN BANK 1; DTC P2441 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK CLOSE BANK 1 ) Starter Signal Starter signal - Power Steering Signal Power steering signal - Power Steering Signal Power steering signal (history) This signal status usually ON until battery terminals disconnected Closed Throttle Position SW Closed throttle position switch - A/C Signal A/C signal - Electrical Load Signal Electrical load signal - Stop Light Switch Stop light switch - Battery Voltage Battery voltage - Atmosphere Pressure Atmospheric pressure - Secondary Air Control VSV Secondary air injection system status - ACT VSV A/C cut status for Active Test - EVAP Purge VSV EVAP purge VSV VSV for EVAP controlled by ECM (ground side duty control) Fuel Pump/Speed Status Fuel pump speed status - VVT Control Status (Bank 1) VVT control status - Vacuum Pump Key-off EVAP system pump status (See EVAP SYSTEM ) EVAP System Vent Value Key-off EVAP system vent valve status - TC and TE1 TC and TE1 terminal of DLC3 - AI Test Secondary air injection system operation prohibit (See DTC P2440 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN BANK 1; DTC P2441 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK CLOSE BANK 1 ) VVT Aim Angle (Bank 1) VVT aim angle - VVT Change Angle (Bank 1) VVT change angle - VVT OCV Duty (Bank 1) VVT OCV operation duty - Idle Fuel Cut Idle fuel cut ON: when throttle valve fully closed and engine speed over 1500 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 count Displayed in only idling Cylinder #2 Misfire Count Cylinder #2 misfire count Displayed in only idling Cylinder #3 Misfire Count Cylinder #3 misfire count Displayed in only idling Cylinder #4 Misfire Count Cylinder #4 misfire count Displayed in only idling All Cylinders Misfire Rate All cylinder misfire count Displayed in only idling Misfire RPM Misfire RPM - Misfire Load Misfire load - Misfire Margin Misfire monitoring - 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 - Model Code Identifying model code TRN2### Engine Type Identifying engine type 2TR Cylinder Number Identifying cylinder number 4 Destination Identifying destination A (America) Model Year Identifying model year 200# System Identification Identifying engine system GASOLINE (gasoline engine)