563.9—Data capture.
The EDR must capture and record the data elements for events in accordance with the following conditions and circumstances:
(a)
In a frontal or side air bag deployment crash, capture and record the current deployment data, up to two events. The memory for each air bag deployment event must be locked to prevent any future overwriting of these data.
(b)
In a deployment event that involves another type of deployable restraint (e.g., pretensioners, knee bolsters, pedestrian protection, etc.), or in a non-deployment event that meets the trigger threshold, capture and record the current non-deployment data, up to two events, subject to the following conditions:
(1)
If an EDR non-volatile memory buffer void of previous-event data is available, the current non-deployment event data is recorded in the buffer.
(2)
If an EDR non-volatile memory buffer void of previous-event data is not available, the manufacturer may choose either to overwrite the previous non-deployment event data with the current non-deployment event data, or not to record the current non-deployment event data.
(3)
EDR buffers containing previous deployment-event data must not be overwritten by the current non-deployment event data.
[73 FR 2184, Jan. 14, 2008]