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.
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HOMESERVICE MANUALSSUBARU2014LEGACY 2.5I, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 50 (ENGINE CONTROL SYSTEM (DIAGNOSTICS) (H4DOTC))SUBARU SELECT MONITOROPERATIONDISPLAY OF ENGINE FREEZE FRAME DATA
2014 Subaru Legacy 2.5i, Automatic CVT Trans
Display Of Engine Freeze Frame Data
2014 Subaru Legacy 2.5i, Automatic CVT TransSECTION Display Of Engine Freeze Frame Data
WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- ECM captures the freeze frame data every 0.5 seconds and always keeps the latest three cords. Time-series freeze frame data includes the latest three freeze frame data and the freeze frame data when the DTC is detected.
- In the time-series freeze frame data, the following freeze frame data are displayed: «Detect», «History1», «History2», and «History3».
- Time lag between the freeze frame data of «Detect» and the freeze frame data of «History1» changes within the range of 0 - 0.5 seconds. This is because the freeze frame data of «Detect» is recorded when the DTC is actually detected, while the freeze frame data of «History1» is updated every 0.5 seconds.
- When more than one DTCs are recorded, the time-series freeze frame data is recorded only for the first-detected DTC, and for the next DTC, just the freeze frame data of «Detect» is recorded. And for the subsequent DTCs, no freeze frame data is recorded.
- When performing diagnosis, you can utilize the time-series freeze frame data to guess the vehicle status when the DTC was detected.
- For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".
- A list of the support data is shown in the following table.
| Content | Item | Unit |
|---|---|---|
| Total number of ignition switch ON | IGN Counter | times |
| Count | Count | - |
| Elapsed time after ignition switch ON | past time after IG on | ms |
| Air fuel ratio control system for bank 1 | Fuel system for Bank 1 | - |
| Oxygen sensor (bank 1 sensor 2) | Oxygen sensor #12 | V |
| A/F correction (bank 1 sensor 2) | Short term fuel trim #12 | % |
| Front oxygen (A/F) sensor (bank 1 sensor 1) | Oxygen sensor #11 | - |
| Rear oxygen sensor (bank 1 sensor 2) | Oxygen sensor #12 | - |
| Neutral condition | AT drive status | - |
| Engine load data | Calculated load value | % |
| Engine coolant temperature | Coolant Temp. | °C or °F |
| Short term fuel trim by front oxygen (A/F) sensor (bank 1) | Short term fuel trim B1 | % |
| Long term fuel trim by front oxygen (A/F) sensor (bank 1) | Long term fuel trim B1 | % |
| Intake manifold absolute pressure | Mani. Absolute Pressure | kPa, mmHg, inHg or psig |
| Engine speed | Engine Speed | RPM |
| Vehicle speed | Vehicle Speed | km/h or MPH |
| #1 Cylinder ignition timing | Ignition timing adv. #1 | ° |
| Amount of intake air | Mass Air Flow | g/s or lb/m |
| Throttle valve angle | Throttle Opening Angle | % |
| On-board diagnostic system | OBD System | - |
| Elapsed time after engine start | Time Since Engine Start | sec |
| Fuel pressure | Fuel pressure gauge | kPa, mmHg, inHg or psig |
| Target EGR | Commanded EGR | % |
| EGR deviation | EGR Error | % |
| Evaporative purge | Evap Purge | % |
| Remaining fuel level | Fuel Level | % |
| Atmospheric pressure | Atmospheric pressure | kPa, mmHg, inHg or psig |
| ECM power supply voltage | ECU ACC | V |
| Absolute load | Absolute Load Value | % |
| A/F target lambda | Target Equivalence Ratio | - |
| Relative throttle opening angle | Relative Throttle Pos. | % |
| Ambient temperature | Ambient Temperature | °C or °F |
| Absolute throttle opening angle 2 | Absolute Throttle Pos.#2 | % |
| Absolute accelerator opening angle 1 | Accelerator Pedal Pos.#1 | % |
| Absolute accelerator opening angle 2 | Accelerator Pedal Pos.#2 | % |
| Target throttle opening angle | Target Throtlle Opening Angle | % |
| X mode | X Mode | - |
| SI drive mode | SI Drive mode(Display) | - |
| Actual throttle opening angle | Actual Throttle Opening Angle | deg |
| Target fuel pressure | Target Fuel pressure gauge | kPa, mmHg, inHg or psig |
| Intake air temperature signal (air flow sensor) | IAT Sensor #11 | °C |
| Intake air temperature sensor (manifold pressure sensor) | IAT Sensor #12 | °C |
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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.