Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Freeze Frame Data: Description
The freeze frame data records the engine condition (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when 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. at the time of the malfunction occurred.
HINT:
If it is impossible to replicate the problem even though a DTC is detected, confirm the freeze frame data.
List of freeze frame data
| LABEL (Intelligent Tester Display) |
Measure Item/Range | Diagnostic Note |
|---|---|---|
| CALC LOAD | Calculate load | Calculated load by ECM |
| COOLANT TEMP | Engine coolant temperature | If the value is -40°C, sensor circuit is open If the value is 140°C, sensor circuit is shorted |
| SHORT FT #1 | Short-term fuel trim | Short-term fuel compensation used to maintain the 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 the short-term fuel trim from the central valve |
| ENGINE SPD | Engine speed | - |
| VEHICLE SPD | Vehicle speed | Speed indicated on speedometer |
| IGN ADVANCE | Ignition advance | - |
| INTAKE AIR | Intake air temperature | If the value is -40°C, sensor circuit is open If the value is 140°C, sensor circuit is shorted |
| MAF | Mass air flow volume | If the value is approximately 0.0 g/sec.:
If the value is 160.0 g/sec. or more:
|
| THROTTLE POS | Throttle position | Read the value with the power switch ON (Do not start engine) |
| O2S B1 S2 | Heated oxygen sensor output | Performing the INJ VOL or A/F CONTROL function of the ACTIVE TEST enables the technician to check voltage output of the sensor |
| O2FT B1 S2 | Fuel trim at heated oxygen sensor | Same as SHORT FT #1 |
| ENG RUN TIME | Accumulated engine running time | - |
| AF FT B1 S1 | Fuel trim at A/F sensor | - |
| AFS B1 S1 | A/F sensor output | Performing the INJ VOL or A/F CONTROL function of the ACTIVE TEST enables the technician to check voltage output of the sensor |
| EVAP PURGE VSV | EVAP purge VSV duty ratio | - |
| DIST DTC CLEAR | Accumulated distance from DTC cleared | - |
| CAT TEMP B1 S1 | Catalyst temperature | - |
| CAT TEMP B1 S2 | Catalyst temperature | - |
| BATTERY VOLTAGE | Battery voltage | - |
| AIR-FUEL RATIO | Air-fuel ratio | - |
| THROTTLE POS | Throttle sensor positioning | Read the value with the power switch ON (Do not start engine) |
| AMBIENT TEMP | Ambient air temperature | If the value is -40°C, sensor circuit is open If the value is 140°C, sensor circuit is shorted |
| THROTTLE POS #2 | Throttle sensor positioning #2 | - |
| THROTTLE MOT | Throttle motor | - |
| TIME DTC CLEAR | Cumulative time after DTC cleared | - |
| KNOCK CRRT VAL | Correction learning value of knocking | - |
| KNOCK FB VAL | Feedback value of knocking | - |
| PURGE DENSITY | Learning value of purge density | - |
| EVAP PURGE FLOW | Purge flow | - |
| FC IDL | Idle fuel cut | ON: when throttle valve fully closed and engine speed is over 1,500 rpm |
| FC TAU | FC TAU | The fuel cut is being performed under very light load to prevent the engine combustion from becoming incomplete |
| VVTL AIM ANGL #1 | VVT aim angle | - |
| VVT CHNG ANGL #1 | VVT change angle | - |
| VVT OCV DUTY B1 | VVT OCV operation duty | - |
| INI COOL TEMP | Initial engine coolant temperature | - |
| INI INTAKE TEMP | Initial intake air temperature | - |
| INJ VOL | Injection volume | - |
| INJECTOR | Injector | - |
| TOTAL FT #1 | Total fuel trim | - |
| MISFIRE RPM | Misfire RPM | - |
| MISFIRE LOAD | Misfire load | - |
| CYL #1 | Cylinder #1 misfire rate | Displayed in only idling |
| CYL #2 | Cylinder #2 misfire rate | Displayed in only idling |
| CYL #3 | Cylinder #3 misfire rate | Displayed in only idling |
| CYL #4 | Cylinder #4 misfire rate | Displayed in only idling |
| CYL ALL | All cylinder misfire rate | Displayed in only idling |
| IGNITION | Ignition | - |
| MISFIRE MARGIN | Misfire monitoring | - |
| ENG OIL PRES SW | Engine oil pressure switch signal | Always ON while engine is running |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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