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 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 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 stored.
- 1 data set when the DTC was stored.
- 1 data set after the DTC was stored.
- 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 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.
- LIST OF FREEZE FRAME DATA
Display Item Measurement Item Diagnostic Note Vehicle Speed Vehicle speed Speed indicated on the speedometer. Engine Speed Engine speed - Calculate Load Calculated load Calculated load by the 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 shorted.
- The VG circuit is open or shorted.
If the mass air flow volume is 160.0 g/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 position - Throttle Motor DUTY Throttle actuator - 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 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 - 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 B1S1 A/F sensor current - 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) - 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 valve. 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 valve. 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.
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 Second 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) - 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 - Starter Control Starter switch status - Power Steering Signal Record Power steering switch status - Starter Relay Starter relay status - Power Steer. Sig. Record Power steering signal (history) This signal status is usually ON until the cables are disconnected from the battery terminals. ACC Relay ACC relay status - Neutral Position SW Signal 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 - Electrical Load Signal Electrical load signal - 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 - TC and TE1 TC and CG (TE1) terminals of DLC3 - Ignition Trig. Count Ignition counter - Cylinder #1 Misfire Count Cylinder #1 misfire Only displayed during idling. Cylinder #2 Misfire Count Cylinder #2 misfire Only displayed during idling. Cylinder #3 Misfire Count Cylinder #3 misfire Only displayed during idling. Cylinder #4 Misfire Count Cylinder #4 misfire Only displayed during idling. Cylinder #5 Misfire Count Cylinder #5 misfire Only displayed during idling. Cylinder #6 Misfire Count Cylinder #6 misfire Only displayed during idling. Cylinder #7 Misfire Count Cylinder #7 misfire Only displayed during idling. Cylinder #8 Misfire Count Cylinder #8 misfire Only displayed during idling. All Cylinders Misfire Count All cylinders misfire Only displayed during idling. 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) - Power Steering Pressure Power steering pressure sensor - ACT VSV A/C cut status for Active Test - 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. SPD (NT) Input shaft speed Data is displayed in increments of 50 rpm. SPD (SP2) Output shaft speed -