Freeze Frame Data

When a DTC is stored, ECM will also record and store engine operating conditions when malfunction occurred. This information is referred to as freeze frame data. Freeze frame data will be stored in ECM memory until cleared, with the exception of the occurrence of an engine misfire or fuel trim malfunction. When a misfire of fuel trim fault occurs, freeze frame data will be updated with the most current information regarding these failures. Freeze frame data cannot be accessed using MIL. Freeze frame data available is:

• Engine coolant temperature.
• Engine speed.
• Vehicle speed.
• Long term fuel compensation (long term fuel trim - displayed as percent).
• Short term fuel compensation (short term fuel trim - displayed as percent).
• Fuel control condition:
• Open or closed loop.
• Malfunction of rear O2S.
• Calculated load value (displayed as percent)
• Diagnostic Trouble Code (DTC) during data recording.