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Exciting technology in a new lightweight design The Audi A2 is paving the way for advanced With its future oriented lightweight design, it mobility in the 21st century represents a new dimension in dynamism and and economy. at the same time is the first volume produced car to have an aluminium body. SSP240 025 SSP240 026 A car for the modern world, innovative, compact, roomy, lightweight, safe and environmentally compatible. 2 Contents Page In a nutshell . 4 Body 6 Engine and gearbox . 14 Running gear Front axle 18 Rear axle 19 Power steering . 20 Components and fitting locations . 21 System overview . 22 Design and function 23 ESP control system 30 ESP control system components 31 Diagnosis warning lights and buttons 36 Electrical system Vehicle’s electrical system . 38 CAN BUS system 40 Comfort system . 44 Central control unit for comfort system J393 45 Door control units 46 Anti theft alarm with interior monitor 50 Diagnosis . 51 Functional diagram of comfort system . 52 Heater/AC Design and function . 54 Compressor 59 Additional heater 64 System overview 68 Functional diagram 70 Service/maintenance Technical data 72 Repair concept of the Audi A2 . 76 Special tools / workshop equipment 76 New Attention Note The self study programme will provide you with information on design and functions. It is not intended as a workshop manual For maintenance and repairs please refer to the current technical literature. 3 In a nutshell Body Anyone who thinks only steel can be stable obviously hasn’t yet heard about aluminium. Thanks to the Audi Space Frame ASF , the A2’s aluminium body is more than 40 lighter than the conventional steel design. Its unladen weight is just 895 kg, around 150 kg lighter than other vehicles its size. Drive system The high torque 1.4l 55 kW TDI three cylinder power unit with pump nozzle injection uses