Self Study Program 459 – Audi A8 2010 Electrical and network systems

VAG SSP 459. This Self-study Programme informs you about the network topology of the Audi A8 ’10. It allows you to quickly and effectively gain a detailed insight into the electronics on the Audi A8 ’10.

Stability and reliability within the electrical system are an important basis for system quality in a situation where the number of electronic systems and components are increasing.

With an overall weight of as much as 50 kilogrammes, around 1,500 individual leads with an average length of approx. 2 metres, numerous contacts, switches, seals, fuse boxes and wiring ducts, the  electrical system is one of the largest, heaviest and most expensive parts of a motor vehicle. Nowadays, the electrical system plays a major role in ensuring the high quality standards demanded of the  electrics/electronics at Audi.

Against the background of present-day energy and environmental considerations, the development of new, lighter electrical system components is extremely important, as weight is a major factor in fuel consumption and, therefore, CO2 emissions.

The number of electronic control units has grown rapidly in recent years. Most of today’s innovations have only been made possible by the increasingly higher performance of the electronic systems. Without that development, many vehicle comforts and conveniences that are now taken for granted would not have been achievable.

In comparison with its predecessor, the Audi A8 ’10 features the following most noticeable differences:

  • the number of control units has increased from 68 to 95
  • a new bus system, the FlexRay, has increased the number of bus systems from 6 to 7
  • the volume of software on the vehicle now exceeds 230 MB, which is almost four times the amount on the previous model

When you have completed this Self-study Programme, you will be able to answer the following questions:

  • In what locations are electrical components fitted on the vehicle?
  • What service-related information should be noted for specific control units?
  • What tasks and functions are performed by the control units on the vehicle?
  • What are the new features of the exterior lights?


  • Power supply
    • Battery
    • Jump-starting terminals
    • Main battery lead
    • Power supply structure
    • Fuses and relays
  • Network system
    • Locations of control units
    • Network topology
    • New features of bus system
    • CAN isolating connector
  • FlexRay
    • Introduction
    • Comparison between CAN bus and FlexRay
    • FlexRay protocol
    • Design
    • Functional procedures
    • Fault diagnosis
  • Control units
    • Databus diagnosis interface J533
    • Battery monitoring control unit J367
    • Alternator C
    • Voltage stabiliser J532
    • Electrical system control unit J519
  • Exterior lights
    • Light switch
    • Headlights
    • Rear lights
  • Service
    • Repairing electronic components using ESD protection
  • Summary
    • Self-study Programmes

The Self-study Programme conveys a basic knowledge of the design and function of new vehicle models, new vehicle components or new technologies.
The Self-study Programme is not a repair guide! Any figures quoted merely serve the purpose of facilitating understanding and relate to the software version valid at the time the SSP was produced.
For details of servicing and repair operations, it is imperative that you refer to the latest technical literature.

Language: English
Format: PDF
Pages: 44

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