Freeze Frame Data Table
FREEZE FRAME DATA TABLE
| Acronym | Description | Measurement Units |
|---|---|---|
| ECT | Engine Coolant Temperature | Degrees |
| FUELSYS1 | Open/Closed Loop1 | OL/CL/OL DRIVE/OL FAULT/CL FAULT |
| LONGFT1 | Long Term Fuel Bank1 | % |
| LOAD | Calculated Load Value | % |
| RPM | Engine RPM | RPM |
| SHRTFT1 VSS | Short Term Fuel Bank1 Vehicle Speed | % km/h-mph |
Some unique parameters (PIDs) are stored in the keep alive memory (KAM) of the powertrain control module (PCM) to help in diagnosing the root cause of misfires. These PIDs are collectively called misfire freeze frame (MFF) data. These parameters are separate from the generic freeze-frame data that is stored for every malfunction indicator lamp (MIL) code. They are used for misfire diagnosis only. The MFF data is more useful for misfire diagnosis than the normal diagnosis only. It is captured at the time of the highest misfire rate and not when the DTC is stored at the end of a 1,000 or 200 revolution block. (Generic freeze-frame data for misfire can be stored minutes after the misfire actually occurred.)
NOTE:
MFF PIDs are supported on all vehicles but may not be available on all diagnostic tools because enhanced PID access may vary by diagnostic tool manufacturer.