Document ID: chunk:federal_register_of_legislation:F2021C01192:body:0:p55
Version: federal_register_of_legislation:F2021C01192
Segment Type: other
Provision Reference: 
Character Range: 144948–147757

manufacturer shall provide a documentation package which gives access to the basic design of "The System" and the means by which it is linked to other vehicle systems or by which it directly controls output variables.
 The function(s) of "The System" and the safety concept, as laid down by the manufacturer, shall be explained.
 Documentation shall be brief, yet provide evidence that the design and development has had the benefit of expertise from all the system fields which are involved.
 For periodic technical inspections, the documentation shall describe how the current operational status of "The System" can be checked.
3.1.1. Documentation shall be made available in 2 parts:
(a) The formal documentation package for the approval, containing the material listed in paragraph 3. (with the exception of that of paragraph 3.4.4.) which shall be supplied to the Technical Service at the time of submission of the type approval application. This will be taken as the basic reference for the verification process set out in paragraph 4. of this annex.
(b) Additional material and analysis data of paragraph 3.4.4., which shall be retained by the manufacturer, but made open for inspection at the time of type approval.
3.2. Description of the functions of "The System"
 A description shall be provided which gives a simple explanation of all the control functions of "The System" and the methods employed to achieve the objectives, including a statement of the mechanism(s) by which control is exercised.
3.2.1. A list of all input and sensed variables shall be provided and the working range of these defined.
3.2.2. A list of all output variables which are controlled by "The System" shall be provided and an indication given, in each case, of whether the control is direct or via another vehicle system. The range of control (paragraph 2.7. above) exercised on each such variable shall be defined.
3.2.3. Limits defining the boundaries of functional operation (paragraph 2.8. above) shall be stated where appropriate to system performance.
3.3. System layout and schematics
3.3.1. Inventory of components
 A list shall be provided, collating all the units of "The System" and mentioning the other vehicle systems which are needed to achieve the control function in question.
 An outline schematic showing these units in combination, shall be provided with both the equipment distribution and the interconnections made clear.
3.3.2. Functions of the units
 The function of each unit of "The System" shall be outlined and the signals linking it with other Units or with other vehicle systems shall be shown. This may be provided by a labelled block diagram or other schematic, or by a description aided by such a diagram.
3.3.3. Interconnections
 Interconnections within "The System" shall be shown by a