Introduction

SCHEMATICS

The schematics divide the entire vehicle electrical system into individual circuits. Interacting electrical components are shown on one common schematic.

Switches and other components are represented in such a way that their general layout and function are self-explicit. They are arranged, such that the current path can be followed from positive (top) to negative (bottom).

IMPORTANT: The components and wires are not drawn to scale. For instance, a lead with a length of over 1 m can be shown as a lead that is only a few cm long. To ensure clear arrangement all connectors, line branches and connected components from the fuses to the component and from the component to ground connection are not shown within the individual diagrams. If required, reference can be made to Fuse Details and Ground Distribution where all lines are illustrated with all plug connections, line branches and connected components.
Fuse
Power and Ground Distribution

All circuit symbols used are listed and explained in Symbols Identification.
Symbol Identification

In Quick Reference Guide all important connectors, ground points and components are listed in tabular form. It provides a precise description of the component locations in the vehicle. Component Locations

In Component Location Views the location of connectors and components which are difficult to locate are shown in line arts or illustrations. In Splice Location Views all splices are listed in numerical order and illustrations are provided to assist in locating splices on larger harnesses. In Connector views diagrams of connectors with more than 2 pins are illustrated.
Component Locations
Splice Locations
Connector Views

Included in the ETM are block diagrams. These are overviews of the entire system (EGS, ABS, AC etc.) which helps understand the relationships between various components and control modules of the system being diagnosed.

EXAMPLE

General conventions can be explained based on the following schematic example.

Schematic Example:

General Conventions

1. Switches and relays are always shown in rest position (e.g. K11).

2. A component shown in a dashed frame signifies that the component is illustrated only in part (e.g. P90 and P91).

3. A component shown in a completely drawn frame signifies that the component is illustrated in full (e.g. K11).

4. The dashed line between pin 8 and pin 6 of connector X293 indicates that both pins belong to connector X293.

5. The dashed line from fuse F1 to pin 8 of connector X293 shows the positive supply of relay K11. If required, refer to Fuse Details under Fuse Information at Diagrams Information and Instructions at fuse F1 for the complete line progressing with plug connections, line branches, wire colors and cross sections.

6. The dashed line with an arrow at splice X452 indicates that several wires lead to splice X452. All lines leading to the connection are illustrated in Central Body Electronics (ZKE). An interrupted line with an arrow indicates that only this one wire leads to another circuit.

7. The dashed line from pin 4 of connector X293 to ground X493 shows the ground supply for relay K11. If required, refer to Ground Distribution at ground X493 for the complete line progression with all plug connections, line branches, wire colors and cross sections.

8. The interrupted line from splice X452 with an A in the open arrow is continued on.

Termination of wire 4 VI/SW from splice X452 with a wavy line indicates that the wire is continued on.