XC90 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
The descriptions below apply in general to all wiring diagrams, although not all sections are necessarily contained here.
A. Component designation
Every component has a component designation that consists of two parts.
The first part is a type number that describes the type of component in question, for example 3/xx.
The second part of the designation is a serial number, for example. x/2.
Combined these give a component designation, for example 3/2.