TSC7001G belongs to a different number range within the Toyota standards from the other numbers of the family listed on this site, which in a corporate numbering system generally indicates a different subject area or a different class of document, and that is the reason a supplier should read the designation rather than the prefix alone. Standards issued by a vehicle manufacturer are indexed so that a reader who knows the system can tell from the number whether the document states a requirement, describes a test method, or governs a component, a system or a vehicle. In the case of a requirement, the document fixes what a component must achieve at its mounting position; the method by which the requirement is verified comes from elsewhere, and the two are cited together in the engineering specification.