How to Use the Wiring Diagrams

How To Use The Wiring Diagrams

The descriptions below apply in general to all wiring diagram, although not all sections are necessarily contained in this information.

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, 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 respective type numbers refer to, for example, 3/x = switch, 6/x = electric motor, etc.
1 Battery
2 Relay
3 Switch
4 Control module
5 Driver information module
6 Electric motor
7 Sensor
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
73 Branching point
74 Connector

The systems are shown in non active status, i.e. with key removed and when doors, hatches and hood are closed.

B. Branching points
The wiring diagrams contain numbered branching points, for example 73/5035.

This information contains a section with a list of branching 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 harnesses and are described in the "Connectors" section.

D. Electrical distribution
Operation of the fuses and relays is shown in the "Electrical distribution" section.

E. Data communication
Today's cars contain CAN, LIN and MOST networks that transfer information. Connections to these networks are not shown in their entirety in the respective wiring diagram. Complete information on CAN, LIN and MOST communication is found in the section "Control modules".

F. Abbreviations
A number of different abbreviations are used in the information. These are explained in the section "Abbreviations".

G. Component location
There is a section at the end of the information in which the appearance and location of components is described in numerical order.

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