TP 39129202 C30/S40 (04-)/V50/C70 (06-) 2009 7
The descriptions below apply in general
to all wiring diagram manuals, although
not all sections are necessarily con-
tained in this manual.
How to use the wiring diagrams 1:2
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 num-
ber, e.g. x/2.
Together, this constitutes a component designation,
e.g. 3/2.
At the end of the manual is a list of components,
where, with the help of the component designation,
you can read off the name of the component, for
example, 3/2 = light switch.
List of type numbers
The list shows which type of component that respec-
tive type numbers refer to, for example, 3/x = switch,
6/x = electric motor, etc.
1 Battery
2Relay
3 Switch
4 Control module
5 Driver information module
6 Electric motor
7Sensor
8 Actuator
9 Heating element
10 Light
11 Fuse
15 Electrical distribution rail/box
16 Audio
17 Service/diagnostics
18 Contact reel
19 Meter
20 Ignition component/shunt
27 Optics
31 Ground connection
63 Branching point
64 Connector
B. Branching points
The wiring diagrams contain numbered junction
points, e.g. 63/352.
This manual contains a section with a list of branch-
ing points. This list shows all the components that
are connected to each branching point.
The location of the branching points is shown in the
"Cable harness routing in vehicle" section.
C. Connectors
Connectors provide a bridge between two cable har-
nesses and are described in the "Connectors" sec-
tion.
D. Electrical distribution
Operation of the fuses and relays is shown in the
"Electrical distribution" section.
E. Data communication
Today’s cars contain CAN and MOST networks that
transfer information. Connections to these networks
are not shown in their entirety in the respective wir-
ing diagram. Complete information on CAN and
MOST communication is found in the section "Con-
trol modules".
F. Abbreviations
A number of different abbreviations are used in the
manual. These are explained in the section "Abbre-
viations".
G. Component location
There is a section at the end of the manual in which
the appearance and location of components is
described in numerical order.
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