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.
- 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.
- LIST OF FREEZE FRAME DATA
LABEL
(Techstream Display)Measurement Item Diagnostic Note Vehicle Speed Vehicle speed Speed indicated on speedometer Engine Speed Engine speed - Calculate Load Calculated load Calculated load by ECM Vehicle Load Vehicle load - MAF Mass air flow volume If value approximately 0.0 gm/sec: - Mass air flow meter power source circuit open or short
- VG circuit open or short
If value 271.0 gm/sec or more:- E2G circuit open
Atmosphere Pressure Atmospheric pressure - 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), sensor circuit shortedAmbient Temperature Ambient temperature - Engine Run Time Accumulated engine running time - Initial Engine Coolant Temp Initial engine coolant temperature - Initial Intake Air Temp Initial intake air temperature - Battery Voltage Battery voltage - Accel Sens. No. 1 Volt % Absolute Accelerator Pedal Position (APP) No. 1 - Accel Sens. No. 2 Volt % Absolute APP No. 2 - Throttle Sensor Volt % Throttle sensor position Read value with engine switch on (IG) (Do not start engine) Throttl Sensor #2 Volt % Throttle sensor position #2 - Throttle Sensor Position Throttle sensor position Read value with engine switch on (IG) (Do not start engine) Throttle Motor DUTY Throttle motor - Fuel Press Fuel Pressure - Injector (Port) Injector - Injection Volum (Cylinder 1) Injection volume - Fuel Pump Speed Control Fuel pump speed control status - Fuel Pump/Speed Status Fuel pump/speed status - Vacuum Pump Leak detection pump ON: Operate Combustion Status (D4) Combustion status (D4) - Fuel Pressure Target Value Target fuel pressure - Fuel Pump Duty (D4) Fuel pump duty (D4) - HP FP Discharge Rate High pressure fuel pump discharge rate - Injection Way Injection mode - Injection Switching Status Prohibition of changing the D-4S injection method - Injection Timing (D4) Injection timing (D4) - Injection Time (D4) Injection time (D4) - EVAP (Purge) VSV EVAP purge VSV duty ratio - Evap Purge Flow Purge flow - Purge Density Learn Value Learning value of purge density - EVAP System Vent Valve EVAP system vent valve ON: Close EVAP Purge VSV EVAP Purge VSV - Purge Cut VSV Duty Purge cut VSV duty - Target Air-Fuel Ratio Air-fuel ratio - AF Lambda B1S1 Fuel trim at A/F sensor - AF Lambda B2S1 Fuel trim at A/F sensor - AFS Voltage B1S1 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 Voltage B2S1 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 Current B1S1 A/F sensor current - AFS Current B2S1 A/F sensor current - A/F Heater Duty #1 Air fuel ratio heater duty ratio - A/F Heater Duty #2 Air fuel ratio heater duty ratio - O2S B1S2 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 B2S2 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 Impedance B1S2 Heated oxygen sensor impedance (Bank 1) - O2S Impedance B2S2 Heated oxygen sensor impedance (Bank 2) - O2 Heater B1S2 Heated oxygen sensor heater - O2 Heater B2S2 Heated oxygen sensor heater - O2 Heater Curr Val B1S2 Heated oxygen sensor current - O2 Heater Curr Val B2S2 Heated oxygen sensor current - 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 Total FT #1 Total fuel trim - 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 Total FT #2 Total fuel trim - Fuel System Status #1 Fuel system status (Bank 1) - OL (Open Loop): Has not yet satisfied conditions to go closed loop
- CL (Closed Loop): Using air-fuel ratio 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 air-fuel ratio sensor, which used for fuel control malfunctioning
Fuel System Status #2 Fuel system status (Bank 2) - OL (Open Loop): Has not yet satisfied conditions to go closed loop
- CL (Closed Loop): Using air-fuel ratio 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 air-fuel ratio sensor, which used for fuel control malfunctioning
IGN Advance Ignition advance - Knock Feedback Value Feedback value of knocking - Knock Correct Learn Value Correction learning value of knocking - VVT Control Status #1 VVT control status (Bank 1) - VVT Control Status #2 VVT control status (Bank 2) - Catalyst Temp B1S1 Catalyst temperature - Catalyst Temp B2S1 Catalyst temperature - Catalyst Temp B1S2 Catalyst temperature - Catalyst Temp B2S2 Catalyst temperature - Starter Signal Starter signal - Starter Control Starter control - Power Steering Signal Power steering signal - Starter Relay Starter relay - ACC Relay ACC relay - Neutral Position SW Signal Neutral position switch signal - Stop Light Switch Stop light switch - A/C Signal A/C signal - Idle Up Signal Idle up signal - Closed Throttle Position SW Closed throttle position switch - Fuel Cut Condition Fuel-cut condition ON or OFF - Immobiliser Communication Immobiliser communication ON or OFF OFF: Communication malfunctioning, or engine immobiliser system set Engine Oil Pressure SW Engine oil pressure switch signal Always ON while engine is running TC Terminal TC terminal status - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance after DTC cleared - Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared - Dist Batt Cable Disconnect Accumulated distance from battery cable disconnected - IG OFF Elapsed Time Cumulative time after engine switch off - TC and TE1 TC and TE1 terminals of DLC3 - Ignition Trig. Count Ignition - Cylinder #1 Misfire Count Cylinder #1 misfire count - Cylinder #2 Misfire Count Cylinder #2 misfire count - Cylinder #3 Misfire Count Cylinder #3 misfire count - Cylinder #4 Misfire Count Cylinder #4 misfire count - Cylinder #5 Misfire Count Cylinder #5 misfire count - Cylinder #6 Misfire Count Cylinder #6 misfire count - All Cylinders Misfire Count All cylinder misfire count - Misfire RPM Misfire RPM - Misfire Load Misfired load - 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 - Cat OT MF F/C Cylinder#1 Display of fuel cut operation in No. 1 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#2 Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#3 Display of fuel cut operation in No. 3 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#4 Display of fuel cut operation in No. 4 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#5 Display of fuel cut operation in No. 5 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#6 Display of fuel cut operation in No. 6 cylinder (if certain level of misfire malfunction is detected) - A/C Magnetic Clutch Relay A/C magnetic clutch relay - Electric Fan Motor Electric fan motor - Idle Fuel Cut Prohibit Prohibition of fuel cut at idle - Idle Fuel Cut Idle fuel cut ON: When throttle valve fully closed and engine speed over 2500 rpm FC TAU FC TAU Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete Electrical Load Signal 1 Electrical load signal - Electrical Load Signal 2 Electrical load signal - Electrical Load Signal 3 Electrical load signal - Electrical Load Signal 4 Electrical load signal - Key Unlock Signal Key unlock signal status - Received MIL from ECT MIL status from ECT - Shift Position Sig from ECT Shift position signal from ECT - A/T Oil Temp from ECT ATF temperature from ECT - SPD (NO) Output shaft speed - SPD (NT) Input shaft speed - ECT Lock Up ECT lock up status -