Fault Diagnosis With the Aid of Wiring Diagrams

INTRODUCTION
In the following pages we will explain in greater detail how the wiring diagrams are drawn up.

SERVICE CATEGORIES
The wiring diagrams are divided into different system groups. The division and order in this manual has been adapted to the division of service categories in other manual and in WIS:
1 Service
2 Engine
3 Electrical system
4 Transmission
5 Brakes
6 Steering system
7 Suspension, wheels
8 Body

Within each service category, the wiring diagrams are then arranged in ascending order within the group.

The first wiring diagram in, for example, the group Engine system is "TRIONIC engine management system" and the last wiring diagram in the group is "Radiator Fan".

A complete list of all system groups and their systems will be found on the next two pages.