Freeze Frame Data

Freeze Frame Data

Description

Freeze frame data allows access to emission related values from specific generic parameter identification (PIDs). These values are stored the instant an emission related diagnostic trouble code (DTC) is stored in continuous memory. This provides a snapshot of the conditions that were present when the DTC was stored. Once one set of freeze frame data is stored this data remains in memory even if another emission related DTC is stored. When a DTC associated with the freeze frame is erased or a keep alive memory (KAM) reset is carried out new freeze frame data can be stored. In the event of multiple emission related DTCs in memory always note the DTC for the freeze frame data.






Accessing Freeze Frame PID Data

- Refer to the manufacturer's manual for diagnostic tool instructions. Resetting Vehicle Specific DTCs

- Refer to the manufacturer's manual for diagnostic tool instructions. OBD PID Data Monitor

The PID monitor for OBD offers real time evaluation of several emissions-related parameters. Most of these are related to the HO2S for which the diesel has no equivalent.