Freeze Frame Data
- 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 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 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
Tester 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 the mass air flow volume is approximately 0.0 gm/sec.: - The mass air flow meter power source circuit is open or short.
- The VG circuit is open or short.
If the mass air flow volume is 271.0 gm/sec. or more:- The E2G circuit is open.
Atmosphere Pressure Atmosphere pressure - Coolant Temp Engine coolant temperature If the value is -40°C (-40°F), the sensor circuit is open.
If the value is 140°C (284°F) or higher, the sensor circuit is shorted.Intake Air Intake air temperature If the value is -40°C (-40°F), the sensor circuit is open.
If the value is 140°C (284°F) or higher, the sensor circuit is shorted.Engine Run Time Accumulated engine running time - Initial Engine Coolant Temp Engine coolant temperature at engine start - Initial Intake Air Temp Intake air temperature at engine start - 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 positioning - Throttl Sensor #2 Volt % Throttle sensor positioning #2 - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle motor - Injector (Port) Injection period of No. 1 cylinder - Fuel Pump Speed Control Fuel pump speed control status - Injection Volum (Cylinder 1) Injection volume - Fuel Pump/Speed Status Fuel pump/speed status - Vacuum Pump Key-off EVAP system leak detection pump status Refer to the EVAP System
Refer to EVAP System .EVAP (Purge) VSV EVAP purge VSV duty ratio - Evap Purge Flow Ratio of evaporative purge flow to intake air volume - Purge Density Learn Value Learning value of purge density - EVAP System Vent Value Key-off EVAP system vent valve status - EVAP Purge VSV EVAP Purge VSV - Purge Cut VSV Duty Purge cut VSV duty - Target Air-Fuel Ratio Ratio compared to stoichiometric level - AF Lambda B1S1 Fuel trim at A/F sensor - AF Lambda B2S1 Fuel trim at A/F sensor - AFS Voltage B1S1
AFS Voltage B2S1A/F sensor output Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the sensor. AFS Current B1S1 A/F sensor current - AFS Current B2S1 A/F sensor current - A/F Heater Duty #1 A/F heater duty ratio (for Bank 1) - A/F Heater Duty #2 A/F heater duty ratio (for Bank 2) - O2S B1S2
O2S B2S2Heated oxygen sensor output Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the sensor. O2S Impedance B1S2
O2S Impedance B2S2Sub heated oxygen sensor impedance (for Sensor 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 is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio. Long FT #1 Long-term fuel trim Overall fuel compensation is carried out in the long-term to compensate for a continual deviation of the short-term fuel trim from the central value. Total FT #1 Total fuel trim - Short FT #2 Short-term fuel trim Short-term fuel compensation is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio. Long FT #2 Long-term fuel trim Overall fuel compensation is carried out in the long-term to compensate for a continual deviation of the short-term fuel trim from the central value. Total FT #2 Total fuel trim - Fuel System Status #1 Fuel system status (for Bank 1) - OL (Open Loop): Has not yet satisfied the conditions to go to closed loop.
- CL (Closed Loop): Using the heated oxygen sensor as feedback for fuel control.
- OLDrive: Open loop due to driving conditions (fuel enrichment).
- OLFault: Open loop due to a detected system fault.
- CLFault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.
Fuel System Status #2 Fuel system status (for Bank 2) - OL (Open Loop): Has not yet satisfied the conditions to go to closed loop.
- CL (Closed Loop): Using the heated oxygen sensor as feedback for fuel control.
- OLDrive: Open loop due to driving conditions (fuel enrichment).
- OLFault: Open loop due to a detected system fault.
- CLFault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.
IGN Advance Ignition advance - Knock Feedback Value Feedback value of knocking - Knock Correct Learn Value Correction learning value of knocking - ACIS VSV VSV for Acoustic Control Induction System (ACIS) - VVT Control Status #1 VVT control status - VVT Control Status #2 VVT control status - Catalyst Temp B1S1
Catalyst Temp B2S1Estimated catalyst temperature (for Sensor 1) - Catalyst Temp B1S2
Catalyst Temp B2S2Estimated catalyst temperature (for Sensor 2) - Starter Signal Starter switch (STSW) signal - Power Steering Signal Power steering switch status - Neutral Position SW Signal Park/Neutral position (PNP) switch signal - Clutch Switch Clutch Switch - 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 - Immobilizer Communication Immobilizer communication - TC Terminal TC terminal status - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance from DTC cleared - Warm-up 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 ignition switch off - TC and TE1 TC and CG (TE1) terminals of DLC3 - Ignition Trig. Count Ignition counter - 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 cylinders misfire count - 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 over temperature misfire prevention F/C not available - Cat OT MF F/C History Catalyst over temperature misfire prevention F/C history OFF - 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) - ACT VSV A/C cut status for Active Test - Idle Fuel Cut Prohibit Prohibition of fuel cut at idle - Idle Fuel Cut Fuel cut idle ON: when the throttle valve is fully closed and the engine speed is more than 3500 RPM. FC TAU Fuel cut during very light load Fuel cut being performed under a very light load to prevent the engine combustion from becoming incomplete. Electrical Load Signal 1 Electrical load signal - Electrical Load Signal 2 Electrical load signal - SPD (NT) Input shaft speed Data is displayed in increments of 50 RPM. SPD (SP2) Output shaft speed - FOR MEXICO MODELSTester 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 the mass air flow volume is approximately 0.0 g/sec.: - The mass air flow meter power source circuit is open or short.
- The VG circuit is open or short.
If the mass air flow volume is 160.0 g/sec. or more:- The E2G circuit is open.
Engine Speed Engine speed - Vehicle Speed Vehicle speed Speed indicated on speedometer Coolant Temp Engine coolant temperature If the value is -40°C (-40°F), the sensor circuit is open.
If the value is 140°C (284°F) or higher, the sensor circuit is shorted.Intake Air Intake air temperature If the value is -40°C (-40°F), the sensor circuit is open.
If the value is 140°C (284°F) or higher, the sensor circuit is shorted.Air-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 DUTY Throttle motor - O2S B1 S2
O2S B2 S2Heated oxygen sensor output Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the sensor. AFS B1 S1
AFS B2 S1A/F sensor output Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the sensor. AFS B2 S1 A/F sensor current - Total FT #1 Total fuel trim - Total FT #2 Total fuel trim - Short FT #1 Short-term fuel trim Short-term fuel compensation is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio. Long FT #1 Long-term fuel trim Overall fuel compensation is carried out in the long-term to compensate for a continual deviation of the short-term fuel trim from the central value. Short FT #2 Short-term fuel trim Short-term fuel compensation is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio. Long FT #2 Long-term fuel trim Overall fuel compensation is carried out in the long-term to compensate for a continual deviation of the short-term fuel trim from the central value. Fuel System Status (Bank1) Fuel system status (for bank 1) - OL (Open Loop): Has not yet satisfied the conditions to go to closed loop.
- CL (Closed Loop): Using the heated oxygen sensor as feedback for fuel control.
- OLDrive: Open loop due to driving conditions (fuel enrichment).
- OLFault: Open loop due to a detected system fault.
- CLFault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.
Fuel System Status (Bank2) Fuel system status (for bank 2) - OL (Open Loop): Has not yet satisfied the conditions to go to closed loop.
- CL (Closed Loop): Using the heated oxygen sensor as feedback for fuel control.
- OLDrive: Open loop due to driving conditions (fuel enrichment).
- OLFault: Open loop due to a detected system fault.
- CLFault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.
O2FT B1 S2 Fuel trim at heated oxygen sensor - O2FT B2 S2 Fuel trim at heated oxygen sensor - AF Lambda 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)
Catalyst Temp (B2 S1)Estimated catalyst temperature (for Sensor 1) - Catalyst Temp (B1 S2)
Catalyst Temp (B2 S2)Estimated catalyst temperature (for Sensor 2) - Sub O2S Impedance B1S2
Sub O2S Impedance B2S2Sub heated oxygen sensor impedance (for Sensor 2) - Initial Engine Coolant Temp Engine coolant temperature at engine start - Initial Intake Air Temp Intake air temperature at engine start - Injection Volum (Cylinder1) Injection volume - Starter Signal Starter switch (STSW) 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 (Bank1) VVT control status - Vacuum Pump Key-off EVAP system leak detection pump status Refer to EVAP System
Refer to EVAP SystemEVAP 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 (Bank1) VVT aim angle - VVT Change Angle (Bank1) VVT change angle - VVT OCV Duty (Bank1) 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 the engine speed is more than 3500 RPM FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent the engine combustion from becoming incomplete Ignition Ignition counter - 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 cylinders misfire count - 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 over temperature misfire prevention F/C not available - Cat OT MF F/C History Catalyst over temperature misfire prevention F/C history OFF - 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) - 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 - Warm-up Cycle Cleared DTC Warm-up cycle after DTC cleared -