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 form of freeze frame data every 0.5 seconds. Using the Techstream, 5 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 the cause of the malfunction, and 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 Calculate 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 sub-assembly power source circuit open or shorted
- VG circuit open or shorted
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), 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 No. 1 - Accel Sens. No. 2 Volt % Absolute accelerator pedal position No. 2 - Throttle Sensor Volt % Throttle position - Throttl Sensor #2 Volt % Throttle sensor positioning #2 - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle actuator - Injector (Port) Fuel injector assembly - 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: Operating 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 - Purge Cut VSV Duty Purge cut vsv duty - Target Air-Fuel Ratio Target air fuel ratio - AF Lambda B1S1 Fuel trim at air fuel ratio sensor (Bank 1) - AF Lambda B2S1 Fuel trim at air fuel ratio sensor (Bank 2) - AFS Voltage B1S1 Air fuel ratio sensor output (Bank 1) 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 air fuel ratio sensor AFS Voltage B2S1 Air fuel ratio sensor output (Bank 2) 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 air fuel ratio sensor AFS Current B1S1 Air fuel ratio sensor current (Bank 1) - AFS Current B2S1 Air fuel ratio sensor current (Bank 2) - A/F Heater Duty #1 Air fuel ratio heater duty ratio (Bank 1) - A/F Heater Duty #2 Air fuel ratio heater duty ratio (Bank 2) - O2S B1S2 Heated oxygen sensor output (Bank 1) 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 heated oxygen sensor O2S B2S2 Heated oxygen sensor output (Bank 2) 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 heated oxygen 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 (Bank 1) - O2 Heater B2S2 Heated oxygen sensor heater (Bank 2) - O2 Heater Curr Val B1S2 Heated oxygen sensor current (Bank 1) - O2 Heater Curr Val B2S2 Heated oxygen sensor current (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 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 - ACIS VSV Intake air control valve assembly for acoustic control induction system - AICV VSV Vacuum switching valve for air intake control system - 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 - Power Steering Signal Record Power steering signal - Neutral Position SW Signal Park/neutral position switch assembly signal - Stop Light Switch Stop light switch assembly - 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 - Immobilizer Communication Immobilizer communication ON or OFF OFF: Communication malfunctioning, or engine immobilizer system set 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 count - 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 - Misfire Margin Misfire monitoring - 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 Catalyst over temperature misfire prevention #1 - Cat OT MF F/C Cylinder#2 Catalyst over temperature misfire prevention #2 - Cat OT MF F/C Cylinder#3 Catalyst over temperature misfire prevention #3 - Cat OT MF F/C Cylinder#4 Catalyst over temperature misfire prevention #4 - Cat OT MF F/C Cylinder#5 Catalyst over temperature misfire prevention #5 - Cat OT MF F/C Cylinder#6 Catalyst over temperature misfire prevention #6 - ACM Inhibit Active control mount inhibit - ACM Duty vacuum switching valve for active control engine mount duty ratio - Electric Fan Motor Electric fan motor (Cooling fan motor) - 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 incomplete engine combustion Communication with ECT Status of the communication with ECT - Comm with Power Manage Status of the communication with power management control ECU - Comm with Air Conditioner Status of the communication with air conditioning amplifier assembly - Electrical Load Signal 1 Electrical load signal - Electrical Load Signal 2 Electrical load signal - 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 - ECT Lock Up ECT lock up status - Shift SW Status (P Range) Park/neutral position switch assembly status - Shift SW Status (R Range) Park/neutral position switch assembly status - Shift SW Status (N Range) Park/neutral position switch assembly status - Sports Shift Up SW Sport shift up switch status - Sports Shift Down SW Sport shift down switch status - Sports Mode Selection SW Sport mode select switch status - Snow Switch Status Pattern switch (ECT SNOW) status - Shift SW Status (D Range) Park/neutral position switch assembly status -