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basic parameters (documentation of all reference values and set points of the measurable values concerning the vehicle, such as torque settings, brake clearance measurements, hydraulic and pneumatic pressures),
diagrams and descriptions of stages in repair and maintenance operations (service handbooks, technical documents such as work plans, descriptions of tools used to carry out a given repair, and diagrams such as wiring schematics or hydraulics),
testing and diagnosis (including diagnostic fault/trouble-shooting codes, software and other information needed to diagnose faults on vehicles) — much, but not all, of this information is contained in specialised electronic tools,
codes, software and other information needed to re-program, re-set or re-initialise the electronic control units (ECUs) embarked on a vehicle. This category is linked to the preceding one, in that often the same electronic tools are used to diagnose the fault, and then make the necessary adjustments via the ECUs to deal with it,
spare parts information, including parts catalogues with codes and descriptions, and vehicle identification methods (that is to say, data relating to a specific vehicle which enable a repairer to identify the individual codes for the parts fitted during vehicle assembly, and to identify the corresponding codes for compatible original replacement parts for that specific vehicle),
special information (recall notices and notification of frequent faults),
training materials.