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 moving or stationary, 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 a Techstream, five 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 of the cause of the malfunction, and in judging whether it was temporary or not.
- LIST OF FREEZE FRAME DATA
Techstream
LIST OF FREEZE FRAME DATA (TECHSTREAM)
| Tester Display | Measurement Item | Diagnostic Note |
|---|---|---|
| Injector (Port) | Injection period of No. 1 cylinder | - |
| IGN Advance | Ignition timing advance for No. 1 cylinder | - |
| Calculate Load | Calculated load by ECM | - |
| Vehicle Load | Vehicle load | Load percentage in terms of maximum intake air flow amount |
| MAF | Air flow rate from Mass Air Flow (MAF) meter | If value approximately 0.0 g/sec:
If value 271.0 g/sec or more:
|
| Engine Speed | Engine speed Min. 0 rpm, Max. 16383.75 rpm | - |
| Vehicle Speed | Vehicle speed Min. 0 km/h, Max. 255 km/h | Speed indicated on speedometer |
| Coolant Temp | Engine coolant temperature Min. -40°C, Max. 140°C |
|
| Intake Air | Intake air temperature Min. -40°C, Max. 140°C |
|
| Air-Fuel Ratio | Ratio compared to stoichiometric level Min. 0, Max. 1.999 |
- |
| Purge Density Learn Value | Learning value of purge density Min. -50, Max. 350 |
Service data |
| Evap Purge Flow | Ratio of evaporative purge flow to intake air volume Min. 0%, Max. 102.4% |
Service data |
| EVAP (Purge) VSV | EVAP (Purge) VSV control duty Min. 0%, Max. 100% |
Order signal from ECM |
| Knock Correct Learn Value | Correction learning value of knocking Min -64°CA, Max. 1984°CA |
Service data |
| Knock Feedback Value | Feedback value of knocking Min -64°CA, Max. 1984°CA |
Service data |
| Accelerator Position No.1 | Accelerator pedal position No. 1 Min. 0%, Max. 100% |
- |
| Accelerator Position No.2 | Accelerator pedal position No. 2 Min. 0%, Max. 100% |
- |
| Throttle Position | Absolute throttle position sensor Min. 0%, Max. 100% |
Calculated value based on VTA1 Read value with ignition switch ON |
| Throttle Sensor Position | Throttle sensor positioning Min. 0%, Max. 100% |
Recognition value for throttle opening angle on ECM Read value with ignition switch ON |
| Throttle Sensor Position #2 | Absolute throttle sensor positioning #2 Min. 0%, Max. 100% |
Recognition value for throttle opening angle on ECM Read value with ignition switch ON |
| Throttle Motor | Throttle actuator Min. 0%, Max. 100% |
- |
| O2S B1 S2 | Heated oxygen sensor output voltage for bank 1 sensor 2 Min. 0 V, Max. 1.275 V |
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 voltage for bank 1 sensor 1 Min. 0 V, Max. 7.999 V |
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 of bank 1 Average value for fuel trim system of bank 1 Min. -0.5, Max. 0.496 |
- |
| Short FT #1 | Short-term fuel trim of bank 1 Min. -100%, Max. 99.2% |
Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio |
| Long FT #1 | Long-term fuel trim of bank 1 Min.-100%, Max. 99.2% |
Overall fuel compensation carried out in long-term to compensate continual deviation of short-term fuel trim from central value |
| Fuel System Status (Bank1) | Fuel system status (bank 1) OL or CL or OLDRIVE or OLFAULT or CLFAULT |
|
| Fuel System Status (Bank2) | Fuel system status (bank 2) | |
| AF FT B1 S1 | Short-term fuel trim associated with bank 1 sensor 1 Min. 0, Max. 1.999 |
- |
| AFS B1 S1 | Air fuel ratio sensor output current for bank 1 sensor 1 Min. -128 mA, Max. 127.99 mA |
Value becomes higher when fuel-cut executed under high engine speed |
| Catalyst Temp (B1 S1) | Catalyst temperature (associated sensor 1) Min.-40°C, Max. 6513.5°C |
- |
| Catalyst Temp (B1 S2) | Catalyst temperature (associated sensor 2) Min.-40°C, Max. 6513.5°C |
- |
| Sub O2S Impedance B1S2 | Sub heated oxygen sensor impedance (bank 1 sensor 2) Min. 0 ohm, Max. 21247.68 ohm |
- |
| Initial Engine Coolant Temp | Initial engine coolant temperature Min. -40°C, Max. 120°C |
Service data |
| Initial Intake Air Temp | Initial intake air temperature Min.-40°C, Max. 120°C |
Service data |
| Injection Volume (Cylinder1) | Injection volume (Cylinder 1) Min. 0 ml, Max. 2.048 ml |
Quantity of fuel injection volume for 10 times |
| Starter Signal | Starter signal (STA terminal input status) ON or OFF |
- |
| Power Steering Switch | Power steering switch ON or OFF |
- |
| Power Steering Signal | Power steering signal (history) ON or OFF |
This signal status usually ON until battery terminals disconnected |
| Closed Throttle Position SW | Closed throttle position switch ON or OFF |
- |
| A/C Signal | A/C switch status ON or OFF |
- |
| Neutral Position SW Signal | Park/neutral position switch status ON or OFF |
- |
| Electrical Load Signal | Electrical load signal ON or OFF |
- |
| Stop Light Switch | Stop light switch status ON or OFF |
- |
| Immobilizer Communication | Immobilizer communication ON or OFF |
OFF: Communication malfunctioning, or engine immobilizer system set |
| Fuel Cut Condition | Fuel-cut condition ON or OFF |
- |
| Battery Voltage | Battery voltage Min. 0 V, Max. 65.535 V |
- |
| Atmosphere Pressure | Atmospheric pressure Min. 0 kPa, Max. 255 kPa |
- |
| EVAP Purge VSV | VSV status for EVAP control ON or OFF |
Active Test support data |
| Fuel Pump/Speed Status | Fuel pump/status ON or OFF |
Active Test support data |
| VVT Control Status (Bank1) | VVT control (bank 1) status ON or OFF |
Active Test support data |
| Vacuum Pump | Key-off EVAP system leak detection pump status ON or OFF |
Active Test support data |
| EVAP System Vent Valve | key-off EVAP system vent valve status ON or OFF |
Active Test support data |
| Electric Fan Motor | Electric cooling fan motor ON or OFF |
Active Test support data |
| TC and TE1 | TC and CG (TE1) terminals of DLC3 ON or OFF |
Active Test support data |
| Engine Speed of Cyl #1 | Engine RPM for cylinder 1 Min. 0 rpm, Max. 25600 rpm |
Output only when Check the Cylinder Compression performed using Active Test 51199 rpm: Not performed Active Test |
| Engine Speed of Cyl #2 | Engine RPM for cylinder 2 Min. 0 rpm, Max. 25600 rpm |
Output only when Check the Cylinder Compression performed using Active Test 51199 rpm: Not performed Active Test |
| Engine Speed of Cyl #3 | Engine RPM for cylinder 3 Min. 0 rpm, Max. 25600 rpm |
Output only when Check the Cylinder Compression performed using Active Test 51199 rpm: Not performed Active Test |
| Engine Speed of Cyl #4 | Engine RPM for cylinder 4 Min. 0 rpm, Max. 25600 rpm |
Output only when Check the Cylinder Compression performed using Active Test 51199 rpm: Not performed Active Test |
| Av Engine Speed of All Cyl | Engine RPM for all cylinders Min. 0 rpm, Max. 25600 rpm |
Output only when Check the Cylinder Compression performed using Active Test 51199 rpm: Not performed Active Test |
| VVT Aim Angle (Bank1) | VVT aim angle (bank 1) Min. 0%, Max. 100% |
VVT duty signal value during intrusive operation |
| VVT Change Angle (Bank1) | VVT change angle (bank 1) Min. 0°FR, Max. 60°FR |
Displacement angle during intrusive operation |
| VVT OCV Duty (Bank1) | VVT OCV operation duty Min. 0%, Max. 100% |
Requested duty value for intrusive operation |
| Idle Fuel Cut | Fuel cut idle ON or OFF |
Idle Fuel Cut = "ON" when throttle valve fully closed and engine speed over 2800 rpm |
| FC TAU | Fuel cut TAU (Fuel cut during very light load) ON or OFF |
Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete |
| Ignition | Ignition counter to calculated misfire rate Min. 0, Max. 800 |
- |
| Cylinder #1 Misfire Count | Misfire ratio of cylinder 1 Min. 0, Max. 255 |
This item displayed only when idling |
| Cylinder #2 Misfire Count | Misfire ratio of cylinder 2 Min. 0, Max. 255 |
This item displayed only when idling |
| Cylinder #3 Misfire Count | Misfire ratio of cylinder 3 Min. 0, Max. 255 |
This item displayed only when idling |
| Cylinder #4 Misfire Count | Misfire ratio of cylinder 4 Min. 0, Max. 255 |
This item displayed only when idling |
| All Cylinders Misfire Count | All cylinders misfire rate Min. 0, Max. 255 |
- |
| Misfire RPM | Average engine speed when misfire occurs Min. 0 rpm, Max. 6375 rpm |
- |
| Misfire Load | Average engine load when misfire occurred Min. 0 g/rev, Max. 3.98 g/rev |
- |
| Misfire Margin | Margin to detect engine misfire Min. -100%, Max. 99.22% |
Misfire detection margin |
| Catalyst OT MF F/C | Catalyst overheat misfire prevention fuel cut function availability Not Avl or Avail |
Service data |
| Cat OT MF F/C History | Catalyst overheat misfire prevention fuel cut function history ON or OFF |
Service data |
| Cat OT MF F/C Cylinder#1 | Display of fuel cut operation in No. 1 cylinder (if certain level of misfire malfunction is detected) ON or OFF |
- |
| Cat OT MF F/C Cylinder#2 | Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected) ON or OFF |
- |
| Cat OT MF F/C Cylinder#3 | Display of fuel cut operation in No. 3 cylinder (if certain level of misfire malfunction is detected) ON or OFF |
- |
| Cat OT MF F/C Cylinder#4 | Display of fuel cut operation in No. 4 cylinder (if certain level of misfire malfunction is detected) ON or OFF |
- |
| Engine Run Time | Engine run time Min. 0, Max. 65535 |
- |
| Time after DTC Cleared | Time since DTCs cleared Min. 0 min., Max. 65535 min. |
- |
| Distance from DTC Cleared | Distance traveled since DTCs cleared Min. 0 km, Max. 65535 km |
- |
| Warmup Cycle Cleard DTC | Warm-up cycles since DTCs cleared Min. 0, Max. 255 |
Number of warm-up cycles since DTCs cleared |