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.
- LIST OF FREEZE FRAME DATA MEASUREMENT ITEM REFERENCE
Display Item Measurement Item Diagnostic Note Injector (Port) Injection period of No. 1 cylinder - IGN Advance Ignition advance - 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.
Engine Speed Engine speed - Vehicle Speed Vehicle speed Speed indicated on the 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.2nd Air System Status Second air system status - 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 Throttle position - Throttle Sensor Position Throttle sensor positioning - Throttle Sensor Position #2 Throttle sensor positioning #2 - Throttle Motor Throttle actuator - 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 FT #2Total 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 valve. 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. Fuel System Status (Bank 1) Fuel system status (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.
- OL Drive: Open loop due to driving conditions (fuel enrichment).
- OL Fault: Open loop due to a detected system fault.
- CL Fault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.
Fuel System Status (Bank 2) Fuel system status (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.
- OL Drive: Open loop due to driving conditions (fuel enrichment). OL Fault: Open loop due to a detected system fault.
- CL Fault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.
AF FT 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 (Sensor 1) - Catalyst Temp (B1 S2)
Catalyst Temp (B2 S2)Estimated catalyst temperature (Sensor 2) - Sub O2S Impedance B1 S2
Sub O2S Impedance B2 S2Sub heated oxygen sensor impedance (Sensor 2) - Initial Engine Coolant Temp Engine coolant temperature at engine start - Initial Intake Air Temp Intake air temperature at engine start - Injection Volume (Cylinder 1) Injection volume - Air pump pressure (absolute) Air pump pressure - Air Pump Pulsation Pressure Air pump pulsation pressure - Air Pump 2 Pressure (Absolute) Air pump pressure - Air Pump 2 Pulsation Pressure Air pump pulsation pressure - Power Steering Pressure Power steering pressure sensor - SPD (SP2) Output shaft speed - SPD (NT) Input shaft speed Data is displayed in increments of 50 rpm. ACC Relay ACC relay status - Starter Relay Starter relay status - Starter Signal Starter switch (STSW) signal - Starter Control Starter switch status - Power Steering Switch Power steering switch status - Power Steering Signal Power steering signal (history) This signal status is usually ON until the cables are disconnected from the battery terminals. 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 - Immobilizer Communication Immobilizer communication - Fuel Cut Condition Fuel cut condition - Battery Voltage Battery voltage - Atmosphere Pressure Atmosphere pressure - Secondary Air Control VSV Secondary air injection system status - ACIS VSV VSV for Acoustic Control Induction System (ACIS) - ACT VSV A/C cut status for Active Test - VVT Control Status (Bank 2) VVT control status - EVAP Purge VSV EVAP Purge VSV - Fuel Pump/Speed Status Fuel pump/speed status - VVT Control Status (Bank 1) VVT control status - Vacuum Pump Key-off EVAP system leak detection pump status Refer to the EVAP System (See EVAP SYSTEM ). EVAP System Vent Value Key-off EVAP system vent valve status - TC and TE1 TC and CG (TE1) terminals of DLC3 - Al Test Secondary air injection system operation prohibit - 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 - Engine Speed of Cyl #7 Engine speed for cylinder 7 - Engine Speed of Cyl #8 Engine speed for cylinder 8 - Av Engine Speed of All Cyl Engine speed for all cylinders - VVT Aim Angle (Bank 1) VVT aim angle - VVT Change Angle (Bank 1) VVT change angle - VVT OCV Duty (Bank 1) VVT OCV operation duty - VVT Ex Hold Lrn Val (Bank 1) VVT exhaust hold duty ratio learning value (Bank 1) - VVT Ex Chg Angle (Bank 1) VVT exhaust change angle (Bank 1) - VVT Ex OCV Duty (Bank 1) VVT exhaust OCV duty (Bank 1) - VVT Aim Angle (Bank 2) VVT aim angle - VVT Change Angle (Bank 2) VVT change angle - VVT OCV Duty (Bank 2) VVT OCV operation duty - VVT Ex Hold Lrn Val (Bank 2) VVT exhaust hold duty ratio learning value (Bank 2) - VVT Ex Chg Angle (Bank 2) VVT exhaust change angle (Bank 2) - VVT Ex OCV Duty (Bank 2) VVT exhaust OCV duty (Bank 2) - Idle Fuel Cut Fuel cut idle ON: when the throttle valve is fully closed and the engine speed is more than 3,500 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. Ignition 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 Cylinders 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) - 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 -