How to Use the Diagrams

A. Component designation
Each component has a component designation. This consists of a type number and a component number.

There is a list of component designations at Component I.D List where you can obtain the components names. List of Components By Component Number

B. Type number
The first part of the component designation indicates which type of component it is, for example switch, electric motor, etc.

List of type numbers:
1 Battery
2 Relay
3 Electrical switch
4 Control module
5 Combined instrument panel
6 Electric motor
7 Sensor
8 Actuator
9 Heater element
10 Lamp
11 Fuse
15 Distribution rail, power supply
16 Radio
17 Service / On board diagnostic system (OBD)
18 Contact Reel
19 Gauge
20 Ignition components / resistor
23 Junction point
24 Connector
31 Ground terminal
34 Terminal block / -bridge
C Connector

C. Component number
The second part of the component designation indicates which specific component it is, light switch, central locking motor, etc.

D. Junction points
The junction points are numbered with a 23/xxx prefix. There is a list of the different junction points. It shows which other components the junctions points are joined to. The locations are shown in Locations, Harness, "Routing of cable harnesses in the car". Harness Locations

E. Electrical distribution
Supply to the fuse is displayed in Power and Ground Distribution, Diagrams, "Electrical distribution". Diagrams

F. Abbreviations
There are a number of abbreviations used in the book. These are explained in "Wire Color code Identification and Other Abbreviations". Wire Color Code Identification and Other Abbreviations

Example. R-W = Red-white

G. CAN-communication
Cables which are drawn as broken lines are displayed in Computers and Controls, Information Bus, Diagrams, "Data communication". Diagrams

H. Components
This shows which different positions the different cables are connected to on the relevant component.

J. Location of components
It shows where the function components are located.

K. Connectors
Connectors which are an interface between two cable harnesses are described in "Connectors Views". Connector Views

Explanation Of Symbols Fig. 1:

Explanation Of Symbols Fig. 2:

Table:

Table
Certain multi-point switches are described using a Table. The table is used to read off when the terminals are electrically connected to each other.

Example. In position III, terminal 30 is connected to terminals 15A, S, and 50.