Priority Of Freeze Frame Data
WARNING: This page is about a different car, the 2002 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
ECM (PCM) has 4 frames where freeze frame data can be stored. The first frame stores freeze frame data of malfunction which was detected first. However, freeze frame data stored in this frame is updated according to priority described. If malfunction as described in the upper square No. 1 is detected while the freeze frame data in the lower square No. 2 has been stored, freeze frame data No. 2 will be updated by freeze frame data No. 1.
In 2nd through 4th frames, freeze frame data of each malfunction is stored in the order malfunctions are detected. This data is not updated. Examples of how freeze frame data are stored when two or more malfunctions are detected are shown in illustration. See Fig 1 .