BMWAG
Electrical troubleshooting manual
5 Series - E34 (518i, 520i, 525td, 525tds, incl. touring) Schematics Model year 1994

Introduction
Scheme 0110.0


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 on the sheet 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 1m can be shown as a lead which 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 cells. If required, reference can be made to the cells 0670.3 Fuse Details and 0670.4 Ground Distribution where all lines are illustrated with all plug connections, line branches and connected components.
All circuit symbols used are listed and explained in the cell 0140.0 Symbols.
In cell 7000.0 Component Location Chart all important connectors, ground points and components are listed in tabular form. It provides a precise description of the component locations in the vehicle.
In cell 7100.0 Component Location Views the locations of the connectors and components which are difficult to locate are shown in line arts or illustrations. In cell 8000.0 Solder Connector Location Views all splices are listed in numerical order and illustrations are provided to assist in locating splices on larger harnesses. In cell 8500.0 Connector Views diagrams of connectors with more than 2 pins are illustrated.
Example
General conventions can be explained based on the following schematic example.


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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 at the connector X293 indicates that both pins belong to the connector X293.
5. The dashed line from fuse 1 to pin 8 of the connector X293 shows the positive supply of the relay K11. If required, refer to cell 0670.3 Fuse Details at fuse F1 for the complete line progression with all plug connections, line branches, wire colours and cross sections.
6. The dashed line with arrow at the connector X452 indicates that several wires lead to the connector X452. All lines leading to the connection are illustrated in cell 6100.0 Central Body Electronics (ZKE). An uninterrupted line with arrow indicates that only this one line leads to another circuit.
7. The dashed line from pin 4 of connector X293 to ground X493 shows the ground supply of the relay K11. If required, refer to cell 0670.4 Ground Distribution at ground X493 for the complete line progression with all plug connections, line branches, wire colours and cross sections.
8. The uninterrupted line from connector X452 with an A in the open arrow is continued on page 6160.0-02.

Termination of the wire 4 WSW from connector X452 with a wavy line indicates that the wire is continued on the opposite page.