Freeze Frame Data
- 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 moving or stationary, 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 duplicate the problem even though a DTC is output, 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 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 in judging whether it was temporary or not.
- 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 moving or stationary, the engine was warmed up or not, the air-fuel ratio was Lean or Rich, and other data from the time the malfunction occurred.
- 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 approximately 0.0 gm/sec.: - Mass air flow meter power source circuit open or short.
- VG circuit open or short.
If 160.0 gm/sec. or more:- E2G circuit open.
Atmosphere Pressure Atmosphere pressure - Coolant Temp Engine coolant temperature If -40°C (-40°F), sensor circuit open.
If 140°C (284°F) or more, sensor circuit shorted.Intake Air Intake air temperature If -40°C (-40°F), sensor circuit open.
If 140°C (284°F) or more, sensor circuit shorted.Ambient Temperature Ambient Temperature - 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 position - Throttl Sensor #2 Volt % Throttle sensor positioning #2 - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle motor - Fuel Press Switching Valve Fuel press switching valve status - Injector (Port) Injection period of No. 1 cylinder - 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 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 Valve 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 B1 S1 Fuel trim at A/F sensor - AF Lambda B2 S1 Fuel trim at A/F sensor - AFS Voltage 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 output voltage of sensor. AFS Voltage B2 S1 AFS Current B1 S1 A/F sensor current (for Bank 1) - AFS Current B2 S1 A/F sensor current (for Bank 2) - 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 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 output voltage of sensor. O2S B2 S2 O2S Impedance B1S2 Sub heated oxygen sensor impedance (for Sensor 2) - O2S Impedance B2S2 O2 Heater B1S2 Heated oxygen sensor heater (for Sensor 2) - O2 Heater B2S2 O2 Heater Curr Val B1S2 Heated oxygen sensor current (for Sensor 2) - O2 Heater Curr Val B2S2 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 (for Bank 1) - OL (Open Loop): Has not yet satisfied conditions to go closed loop.
- CL (Closed Loop): Using A/F 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 A/F sensor, which used for fuel control, malfunctioning.
Fuel System Status #2 Fuel system status (for Bank 2) - OL (Open Loop): Has not yet satisfied conditions to go closed loop.
- CL (Closed Loop): Using A/F 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 A/F sensor, which used for fuel control, malfunctioning.
Air pump pressure (Absolute) Air pump pressure - Air Pump2 Pressure (Absolute) Air pump pressure - Air Pump Pulsation Pressure Air pump pulsation pressure - Air Pump2 Pulsation Pressure Air pump pulsation pressure - Secondary Air Control VSV Secondary air injection system status - 2nd Air System Status Secondary air system status - AI Test Secondary air injection system operation prohibit - 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) - Actual VVT Angle #1 Actual VVT displacement angle (bank 1) This item is used for freeze frame data only Actual VVT Angle #2 Actual VVT displacement angle (bank 2) This item is used for freeze frame data only Actual VVT Ex Angle #1 Actual VVT exhaust displacement angle (bank 1) This item is used for freeze frame data only Actual VVT Ex Angle #2 Actual VVT exhaust displacement angle (bank 2) This item is used for freeze frame data only VVT Control Status #1 VVT control status (for Bank 1) - VVT Control Status #2 VVT control status (for Bank 2) - Catalyst Temp B1 S1 Estimated catalyst temperature (for Sensor 1) - Catalyst Temp B2 S1 Catalyst Temp B1 S2 Estimated catalyst temperature (for Sensor 2) - Catalyst Temp B2 S2 Starter Signal Starter switch (STSW) signal - Starter Control Starter switch status - Power Steering Signal Power steering switch status - Starter Relay Starter relay status - ACC Relay ACC relay status - Neutral Position SW Signal Park/Neutral position (PNP) switch signal - Transfer Neutral Status of the transfer neutral - Transfer L4 Park/Neutral position (PNP) switch signal - 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 - Immobiliser Communication Immobiliser communication - TC Terminal TC terminal status - 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 - Dist Batt Cable Disconnect Total distance vehicle driven after 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 - Cylinder #2 Misfire Count Cylinder #2 misfire - Cylinder #3 Misfire Count Cylinder #3 misfire - Cylinder #4 Misfire Count Cylinder #4 misfire - Cylinder #5 Misfire Count Cylinder #5 misfire - Cylinder #6 Misfire Count Cylinder #6 misfire - Cylinder #7 Misfire Count Cylinder #7 misfire - Cylinder #8 Misfire Count Cylinder #8 misfire - All Cylinders Misfire Count All cylinders misfire - Multi Cylinders Misfire Count Multiple cylinder misfire - 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 - 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) - Cat OT MF F/C Cylinder#7 Display of fuel cut operation in No. 7 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#8 Display of fuel cut operation in No. 8 cylinder (if certain level of misfire malfunction is detected) - A/F Learn Value Idle #1 Air fuel ratio learned value for idling (for Bank 1) - A/F Learn Value Low #1 Air fuel ratio learned value for low engine loads (for Bank 1) - A/F Learn Value Mid1 #1 Air fuel ratio learned value for mid-sized engine loads 1 (for Bank 1) - A/F Learn Value Mid2 #1 Air fuel ratio learned value for mid-sized engine loads 2 (for Bank 1) - A/F Learn Value High #1 Air fuel ratio learned value for high engine loads (for Bank 1) - A/F Learn Value Idle #2 Air fuel ratio learned value for idling (for Bank 2) - A/F Learn Value Low #2 Air fuel ratio learned value for low engine loads (for Bank 2) - A/F Learn Value Mid1 #2 Air fuel ratio learned value for mid-sized engine loads 1 (for Bank 2) - A/F Learn Value Mid2 #2 Air fuel ratio learned value for mid-sized engine loads 2 (for Bank 2) - A/F Learn Value High #2 Air fuel ratio learned value for high engine loads (for Bank 2) - Power Steering Pressure Power steering pressure sensor - 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 throttle valve fully closed and engine speed over 3500 RPM. FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete. Alcohol Density Estimate Alcohol density estimate - Alcohol Density Learning Status of the alcohol density learning - Electrical Load Signal 1 Electrical load signal - Electrical Load Signal 2 Electrical load signal - Cruise Cancel Signal Status of the Cruise Cancel Signal - SPD (NT) Input shaft speed Data is displayed in increments of 50 RPM. SPD (SP2) Output shaft speed -