Engine. Camry. Acv40 Gsv40
2Az-Fe Engine Control System. Camry. Acv40 Gsv40
Sfi System -- 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 date can be helpful in determining whether the vehicle was running or stopped, 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 duplicate 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 an intelligent tester, 5 separate set 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.
| LIST OF FREEZE FRAME DATA |
| LABEL (Intelligent Tester Display) | Measurement Item/Range | Diagnostic Note |
| Trouble Code | Freeze DTC | - |
| Injector | Injection period of No. 1 cylinder | - |
| IGN Advance | Ignition advance | - |
| Calculate Load | Calculated load | Calculated load by ECM |
| Vehicle Load | Vehicle load | Load percentage in terms of maximum intake air flow amount |
| MAF | Mass air flow volume | If approximately 0.0 g/sec.:
|
| Engine Speed | Engine speed | - |
| Vehicle Speed | Vehicle speed | Speed indicated on speedometer |
| 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 |
| Air-Fuel Ratio | Ratio compared to stoichiometric level | - |
| Purge Density Learn Value | Learning value of purge density | - |
| Purge Flow | Ratio of evaporative purge flow to intake air volume | - |
| EVAP (Purge) VSV | 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 | 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 |
| AFS 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 |
| Total FT #1 | Total fuel trim | - |
| 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 for a continual deviation of short-term fuel trim from central valve |
| Fuel System Status (Bank 1) | Fuel system status (Bank 1) |
|
| AF FT B1 S1 | Fuel trim at A/F sensor | - |
| AFS B1 S1 | A/F sensor output | Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor |
| Catalyst Temp (B1 S1) | Estimated catalyst temperature (sensor 1) | - |
| Catalyst Temp (B1 S2) | Estimated catalyst temperature (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 | - |
| Starter Signal | Starter switch (STSW) signal | - |
| Power Steering Switch | Power Steering Signal | - |
| Power Steering Signal | Power Steering Signal (history) | Signal status usually ON until ignition switch turned off |
| 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 | - |
| EVAP Purge VSV | Purge VSV | - |
| Fuel Pump/Speed Status | Fuel pump/speed status | - |
| VVT Control Status (Bank 1) | VVT control status (bank 1) | - |
| Electric Fan Motor | Electric fan motor | - |
| TC and TE1 | TC and TE1 terminals of DLC3 | - |
| Engine Speed of Cyl #1 | Engine rpm during No. 1 cylinder fuel cut | Output only when FUEL CUT #1 is performed using ACTIVE TEST |
| Engine Speed of Cyl #2 | Engine rpm during No. 2 cylinder fuel cut | Output only when FUEL CUT #2 is performed using ACTIVE TEST |
| Engine Speed of Cyl #3 | Engine rpm during No. 3 cylinder fuel cut | Output only when FUEL CUT #3 is performed using ACTIVE TEST |
| Engine Speed of Cyl #4 | Engine rpm during No. 4 cylinder fuel cut | Output only when FUEL CUT #4 is performed using ACTIVE TEST |
| Av Engine Speed of All Cyl | Average of engine rpm values during fuel cut of No. 1 to No. 4 cylinders | Output only when ACTIVE TEST is performed |
| VVT Aim Angle (Bank 1) | VVT aim angle (bank 1) | - |
| VVT Change Angle (Bank 1) | VVT change angle (bank 1) | - |
| VVT OCV Duty (Bank 1) | VVT OCV operation duty (bank 1) | - |
| Idle Fuel Cut | Idle fuel cut | ON: when throttle valve fully closed and engine speed over 1,500 rpm |
| FC TAU | Fuel cut with a very light load | Fuel cut being performed with a very light load to prevent incomplete engine combustion |
| Ignition | Ignition counter | - |
| Cylinder #1 Misfire Rate | Cylinder #1 misfire rate | Displayed only during idling |
| Cylinder #2 Misfire Rate | Cylinder #2 misfire rate | Displayed only during idling |
| Cylinder #3 Misfire Rate | Cylinder #3 misfire rate | Displayed only during idling |
| Cylinder #4 Misfire Rate | Cylinder #4 misfire rate | Displayed only during idling |
| All Cylinders Misfire Rate | All cylinder misfire rate | Displayed only during idling |
| Misfire RPM | Engine speed when misfire occurs | - |
| Misfire Load | Engine load when misfire occurs | - |
| Misfire Margin | Margin to detect engine misfire | - |
| MIL ON Run Distance | Distance memory after problem 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 | - |
| Warmup Cycle Cleared DTC | Warm-up cycle after DTC cleared | - |