Document ID: chunk:federal_register_of_legislation:F2021C00476:body:0:p57
Version: federal_register_of_legislation:F2021C00476
Segment Type: other
Provision Reference: 
Character Range: 158279–161440

controlled function may be over-ridden by a higher level electronic control system/function.

         A function which is over-ridden becomes part of the complex system.

         2.4. "Higher-level control" systems/functions are those which employ additional processing and/or sensing provisions to modify vehicle behaviour by commanding variations in the normal function(s) of the vehicle control system.

         This allows complex systems to automatically change their objectives with a priority which depends on the sensed circumstances.

         2.5. "Units" are the smallest divisions of system components which will be considered in this annex, since these combinations of components will be treated as single entities for purposes of identification, analysis or replacement.

         2.6.                               "Transmission links" are the means used for inter-connecting distributed units for the purpose of conveying signals, operating data or an energy supply.

          This equipment is generally electrical but may, in some part, be mechanical, pneumatic, hydraulic or optical.

         2.7.  "Range of control" refers to an output variable and defines the range over which the system is likely to exercise control.

         2.8.  "Boundary of functional operation" defines the boundaries of the external physical limits within which the system is able to maintain control.

         3. DOCUMENTATION

         3.1. Requirements

           The 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 Section 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