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)Measure Item Diagnostic Note Trouble Code Freeze DTC - Vehicle Speed Vehicle speed Speed indicated on speedometer Engine Speed Engine speed - 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 shorted
- VG circuit open or shorted
If value 160.0 g/s 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), 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 position Read value with engine switch on (IG) (Do not start engine) Throttle Sensor #2 Volt % Throttle sensor positioning #2 - Throttle Sensor Position Throttle sensor positioning Read value with engine switch on (IG) (Do not start engine) Throttle Motor DUTY Throttle motor - Fuel Press Fuel Pressure - Injection Volume (Cylinder 1) Injection volume - Fuel Pump Speed Control Fuel pump speed control status - Fuel Pump/Speed Status Fuel pump/speed status - Vacuum Pump Vacuum pump ON: Operating Combustion Status (D4) Combustion status (D4) - Fuel Pressure Target Value Target fuel pressure - Fuel Pump Duty (D4) Fuel pump duty (D4) - High Pressure FP Duty High pressure fuel pump duty - HP FP Discharge Rate High pressure fuel pump discharge rate (for bank1) - SCV Status (D4) SCV status (D4) - SCV Angle (D4) SCV angle (D4) - SCV Angle Sensor (D4) SCV angle sensor (D4) - Injection Timing (D4) Injection timing (D4) - Injection Time (D4) Injection timing (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: Closed EVAP Purge VSV EVAP Purge VSV - Target Air-Fuel Ratio Target 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 output current 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 AFS Current B2S1 A/F sensor output current 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 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) for North America O2S Impedance B2S2 Heated oxygen sensor impedance (Bank 2) for North America 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 value 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
- OL DRIVE: Open loop due to driving conditions (fuel enrichment)
- OL FAULT: Open loop due to detected system fault
- CL FAULT: 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
- OL DRIVE: Open loop due to driving conditions (fuel enrichment)
- OL FAULT: Open loop due to detected system fault
- CL FAULT: 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 - ACIS VSV ACIS VSV - VVT Control Status #1 VVT control status (bank 1) - VVT Control Status #2 VVT control status (bank 2) - VVT Aim Angle #1 VVT aim angle (bank 1) - VVT Change Angle #1 VVT change angle (bank 1) - VVT OCV Duty #1 VVT OCV operation duty (bank 1) - VVT Aim Angle #2 VVT aim angle (bank 2) - VVT Change Angle #2 VVT change angle (bank 2) - VVT OCV Duty #2 VVT OCV operation duty (bank 2) - VVT Ex Hold Lrn Val #1 VVT exhaust hold duty ratio learning value (bank 1) - VVT Ex Chg Angle #1 VV exhaust change angle (bank 1) - VVT Ex OCV Duty #1 VVT exhaust OCV duty (bank 1) - VVT Ex Hold Lrn Val #2 VVT exhaust hold duty ration learning value (bank 2) - VVT Ex Chg Angle #2 VVT exhaust change angle (bank 2) - VVT Ex OCV Duty #2 VVT exhaust OCV duty (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 Record Power Steering Signal - Starter Relay Starter relay - Power Steer. Sig. Record Power Steering Signal (history) Signal status usually ON until engine switch is turned off ACC Relay ACC relay - Neutral Position SW Signal Neutral position switch signal - Clutch Switch Clutch switch status - Stop Light Switch Stop light switch - A/C Signal A/C signal - Closed Throttle Position SW Closed throttle position switch - Fuel Cut Condition Fuel cut condition ON or OFF - Immobilizer Communication Immobilizer communication ON or OFF OFF: Communication malfunctioning, or engine immobilizer system set Electrical Load Signal Electrical load signal - Engine Oil Pressure SW Engine oil pressure switch signal Always ON while engine is running Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance after DTC cleared - Warm-up Cycle Cleared DTC Warm-up cycle after DTC cleared - TC and TE1 TC and TE1 terminals of DLC3 - Ignition Trig. Count Ignition - Cylinder #1 Misfire Count Cylinder #1 misfire rate Displayed only while idling Cylinder #2 Misfire Count Cylinder #2 misfire rate Displayed only while idling Cylinder #3 Misfire Count Cylinder #3 misfire rate Displayed only while idling Cylinder #4 Misfire Count Cylinder #4 misfire rate Displayed only while idling Cylinder #5 Misfire Count Cylinder #5 misfire rate Displayed only while idling Cylinder #6 Misfire Count Cylinder #6 misfire rate Displayed only while 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 - Swirl C.V. Duty Ratio SCV duty ratio - A/C Magnetic Clutch Relay A/C magnetic clutch relay - Electric Fan Motor Electric fan motor - 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 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 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 -