Freeze Frame/Failure Records

PCM stores one freeze frame record for the first failed test that sets a DTC and illuminates MIL. Freeze frame will not be overwritten unless a misfire or fuel trim DTC is set. Failure records are stored when any DTC is set. Some PCMs can store up to 5 failure records. Failure records will be stored for all types of codes, whether or not the MIL is illuminated.

Typical data includes:

• Air/fuel ratio.
• Airflow rate.
• Fuel trim.
• Engine speed.
• Engine load.
• Engine coolant temperature.
• Vehicle speed.
• Throttle position angle.
• Manifold absolute pressure.
• Injector base pulse width.
• Loop status.