This comprehensive workshop manual delves into the intricacies of the Citroen Xsara Picasso and Xsara Multiplexed BSI (Body Control System) operating principles, covering models manufactured between 2004 and 2010. It serves as an invaluable resource for technicians and mechanics seeking in-depth knowledge and practical guidance on the vehicle's electronic systems. The manual provides detailed explanations of the BSI's functionality, wiring diagrams, troubleshooting procedures, and repair techniques specific to the Xsara Picasso and Xsara models. With its comprehensive coverage, you'll gain a thorough understanding of the BSI's role in managing various vehicle functions, including lighting, central locking, engine control, and communication interfaces. This manual empowers you to diagnose and resolve a wide range of electronic issues, ensuring efficient and accurate repairs.

## The Citroen Xsara Picasso: A Versatile MPV with Innovative Technology

The Citroen Xsara Picasso is a compact MPV (Multi Purpose Vehicle) that was produced by the French automaker Citroen from 2000 to 2010. Known for its distinctive design, spacious interior, and practical features, the Xsara Picasso quickly became a popular choice for families and individuals seeking a versatile and comfortable vehicle. Its distinctive styling, with its large panoramic windshield and boxy shape, made it easily recognizable, while its spacious interior offered ample room for passengers and cargo. The Xsara Picasso came with a range of petrol and diesel engines, providing a balance of performance and fuel efficiency.

Central to the Xsara Picasso's functionality was the BSI (Body Control System), a sophisticated electronic unit that managed numerous vehicle functions. The BSI was responsible for controlling everything from the lighting system and windows to the central locking and immobiliser. The BSI in the Xsara Picasso used a multiplex system, which replaced the traditional system of individual wiring for each function with a single bus network, allowing for greater efficiency and flexibility. This advanced system also supported features such as CAN (Controller Area Network) communication, allowing different modules within the vehicle to interact and share data. This manual provides a comprehensive overview of the BSI system's operating principles, including its components, architecture, communication protocols, and the troubleshooting and repair procedures for potential issues. It is an essential resource for both professional technicians and dedicated DIYers looking to understand the intricacies of this complex system and perform accurate diagnostics, maintenance, or repairs on their Citroen Xsara Picasso.