344 Vorsprung durch Technik www.audi.de Service Training The New Audi A6 Avant ´05 Self-Study Programme 344 All rights reserved. Technical specifications subject to change without notice. Copyright AUDI AG I/VK-35 Service.training@audi.de Fax +49-841/89-36367 AUDI AG D-85045 Ingolstadt Technical status: 02/05 Printed in Germany A05.5S00.13.
Self-study programmes on the Audi A6 Avant The New Audi A6 Avant ‘05 Audi is adding a new chapter to the success story of the Avant. The new Audi A6 Avant '05 represents a unique blend of design and dynamism, driving pleasure and functionality. SSP 323 Audi A6 ´05 – – – – Here is a car that exhibits a unity and harmony of design. Measuring 4.93 metres in length, 1.86 metres in width, and 1.46 metres in height, the new Audi A6 Avant ´05 visibly sets a new standard in terms of its proportions.
Table of contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Occupant protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Running gear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Electrical systems . . . . . . . . . .
Introduction Overview Dimensions of the Audi A6 Avant ´05.
Body Tailgate In the new Audi A6 Avant ´05, an inner tailgate hinge is implemented for the first time. The hinge is attached to the upper roof crossrail at the rear so that it is located behind the tailgate seal, and thus inside the occupant cell. 344_046 When the tailgate is closed, the hinge is concealed behind the trim panel and is not visible from the interior.
Occupant protection Safety system The goal was to implement a protection system that offers a very high level of safety, thereby raising still further the high safety standard set by the current Audi fleet. The many safety requirements for the new Audi A6 Avant ´05 included meeting all current legislation, as well as achieving a top rating in consumer tests. Audi's internal specifications often increase the challenges to the development team.
Airbag igniter 1, front passenger side N131 If igniter I is electrically activated by the airbag control unit J234, it ignites priming charge I. Under the resulting pressure, the flame passes through the rupture disc and ignites propellant charge I. On account of the hollow propellant tabs, the complete propellant charge ignites more quickly. The metal filter cools and treats the developing gas before it flows through the outlets to the airbag. The task of the first gas generator is to inflate the airbag.
Engine The 2.7l V6 TDI with common rail The 3.0l V6 TDI was modified in several respects to fill the gap between the 2.5l V6 TDI with distributor injection pump and the 3.0l V6 TDI with common rail injection. A wide range of diesel engines in various sizes is therefore available to the customer.
The engine number is located on the cylinder block at the front right adjacent to the vibration absorber. Torque/power curve Max. torque in Nm Max. power output in kW Engine speed in RPM 344_012 Specifications Engine code BPP Type of engine V6 diesel engine Displacement 2698 cm3 Power output 132 kW (180 bhp) Torque 380 Nm at 1400-3300 rpm Bore 83 mm Stroke 83.
Engine Modifications to the 2.7l engine – The stroke was reduced from 91.4 mm to 83.1 mm by modifying the crankshaft, con-rod and piston – Cast exhaust manifold and steel compensator without air-gap insulation – Deletion of the shield plates above the manifolds – Piezo injectors with eight-port nozzles instead of seven-port nozzles – An inlet restrictor has been integrated into the fuel rail for each injector Crankshaft drive The basis is the 3.0l V6 TDI CR engine, i.e.
In-rail restrictor The closing of the injector produces a pulse which propagates from the injector to the fuel rail and is reflected back to the injector. In this connection, the injector pintle and injector pintle seat are subjected to a high mechanical load (bounce). A restrictor is installed upstream of each injector to dampen the pulses in the fuel rail. This restrictor dampens the incoming and outgoing pulses and so prevents the injector pintle from colliding with the injector pintle seat.
Running gear A steel-spring suspension is used in the basic version of Audi A6 Avant `05. In comparison with the running gear in the A6 saloon, the set-ups for the springs, dampers and anti-roll bars have been revised. In the Avant, too, there are suspension systems for front-wheel-drive and quattro versions. The dynamic suspension system is available in the basic version.
344_029 13
Running gear Adaptive air suspension (aas) A modified aas system is optional in the Audi A6 Avant `05. By comparison with the aas in the A8, there is no distinction to be made between the aas standard suspension and the aas sports suspension.
modified pressure accumulator design, mounted to luggage compartment floor separate spring/damper arrangement 344_030 15
Running gear Dampers The Audi A6 Avant ´05 with aas also has continuously adjustable rebound and compression damping characteristics. The front and rear axle dampers differ in respect of their design from the dampers on the A8. The electrically activated damping valve is located on the exterior of the damper tube.
Air supply unit and solenoid valve block The air supply unit and the solenoid valve block are identical in design and function to those of the allroad quattro and A8. Both units are now mounted on a common bracket.
Running gear Ride heights The modes implemented in the Audi A6 Avant ´05 are the same as in the A8. However, the ride heights are different. The following conditions apply to the aas in the Audi A6 Avant ´05: In "dynamic" mode, the car's ride height is lowered permanently by 15 mm compared to "automatic" mode. When the "lift" mode is selected, the car body is raised by 15 mm compared to "automatic" mode.
System failure response If the electrical damping valve is deenergised in case of failure, a default damping force characteristic takes effect. In this case, the damper works like a conventional (non-controlled) damper. Damper set-up Damping force (N) Damping valve deenergised Rebound damping 0 Compression damping Speed m/s2 344_020 aas with MMI Basic The aas system is available in the Audi A6 Avant ´05 in combination with MMI and also, alternatively, in combination with MMI Basic .
Running gear New special tools The following new special tools are used for aas in the Audi A6 Avant ‘05: T 40082/1-6 spring blocker for air springs Due to the modified installation dimensions, the spring blockers used for the A8 are unsuitable for the A6. The advantage of using spring blockers on the A6 front axle is that subsequent replacement of the upper transverse rods is no longer needed.
adaptive cruise control (acc) A new generation of the acc is used in the Audi A6 Avant `05. This acc incorporates the following modifications: the exterior dimensions and weight of the acc unit (sender and control unit) were substantially reduced. Sensor / control unit in the A8 Sensor / control unit in the A6 344_015 The number of radar transceivers integrated into the sender was increased from three to four. As a result, it was possible to increase the beam angle from 8 degrees to 16 degrees.
Running gear A heater was integrated into the bumper insert in front of the sender. It effectively prevents the build-up of snow or ice on the surface of the bumper in front of the sender in wintry road conditions. As a result, higher system availability is assured. The heater is powered by the adaptive cruise control unit. The heater is switched on and off in dependence on the ambient temperature.
ESP The Bosch 8.0 ESP system previously featured in the A6 saloon will also be used in the Audi A6 Avant `05.Several new functions will be implemented for use of the Bosch 8.0 ESP system in the Audi A6 Avant ´05. To implement these auxiliary functions, the processing power of the ESP control unit was enhanced by increasing the clock frequency to 60 MHz from 48 MHz. The new control unit will also be rolled out at the same time in the A6 saloon.
Running gear Automatic stabilisation of the car-trailer combination Slight swinging movements of a trailer can amplify in such a way as to cause a critical driving situation. This situation usually occurs at road speeds between 75 and 120 kph. If the trailer begins to swing when the vehicle is travelling at a speed above the critical threshold, the oscillation amplitude of the trailer will progressively increase.
Notes 25
Electrical systems Bus topology Distance control J428 In comparison with the A6 saloon, the bus topology was extended only to include the tailgate control units in the convenience CAN bus. The tailgate control unit is explained in detail from page 32.
Telephone transmitter and receiver unit R36 Telephone / telematics control unit J526 Front information control unit J523 Telephone handset R37 Navigation system with CD drive control unit J401 TV tuner R78 CD changer R41 Digital sound package control unit J525 Radio module R Language input control unit J507 Tailgate control unit 2 J605 MOST bus Instrument cluster CAN bus Entry and start authorisation switch E415 Antenna reader unit for entry authorisation for keyless entry system J723 Diagnosis
Electrical systems Immobiliser in automatic gearbox In the Audi A6 Avant '05, the automatic gearbox was integrated into the immobiliser. This is the case with both 6-speed automatic gearbox 09L and multitronic gearbox 01J. With model year '06 or later, the automatic gearboxes in the A6 saloon and in the A8 will also have an immobiliser function. The immobiliser still has the type designation "Immobiliser 4", because it uses the same technology as in the A8 '03.
Matching The procedure for matching the gearbox control unit is similar to the procedure for matching the engine control unit. The immobiliser still has the type designation "Immobiliser 4", because it uses the same technology as in the A8 '03. Furthermore, the gearbox is able to accept a new identity. If a key is stolen and the complete key set is replaced, all control units integrated into the immobiliser can assume a new identity.
Infotainment Overview of the infotainment systems MMI basic MMI basic plus Standard equipment Display Monochrome 6.5" screen Monochrome 6.5" screen Control panel 4-key control panel 4-key control panel Operating and display unit control unit In the glove compartment – incl. radio module – incl. audio single CD drive – incl. 2x20W amplifier for 4 loudspeakers, front In the glove compartment – incl. radio module – incl.
MMI basic plus with CD navigation system MMI Monochrome 6.5" screen 7" colour screen 8-key control panel 8-key control panel In the glove compartment – incl. radio module – incl. navigation module – incl.
Convenience electronics Tailgate drive control units J605 and J756 Introduction For increased user convenience, an automatic tailgate is optional in the new Audi A6 Avant ´05. The automatic opening and closing function is implemented by two electric motors mounted on the tailgate hinges. Each electric motor has a stepup gear, a magnetic coupling, measuring sensors and an electronic control unit.
Saving the limit position of the tailgate If the tailgate was stopped in an intermediate position, this position can be saved as a future end position. To do this, the "close" button on the tailgate must be pressed for at least 5 s. Please note that this function is only available as of a minimum opening angle of 45 degrees. 344_045 "Close" button in the tailgate Automatic closing For safety reasons, automatic closing can only be initiated with the tailgate "close" button or with the tailgate handle.
Convenience electronics Manual tailgate operation When the tailgate is moved manually from a stopped intermediate position, the deenergised holding torque is overcome and the "Manual" mode is activated. This manual movement is detected by means of Hall sensors, whereupon the control units energise the couplings in the "freewheel" direction. When movement stops, the couplings is deenergised after approximately one second and the tailgate holds its position automatically.
Sensors Road speed is monitored by a Hall sensor on the left tailgate drive. The right tailgate drive also has a Hall sensor which detects when "manual" mode is required. An additional three small Hall sensors on the left-hand side monitor the direction of movement of the tailgate and the current tailgate position. The Hall sensors are also used for antipinch protection. This is implemented by a speed/distance detection system. If an obstruction detected, the drive will stop.
Convenience electronics System overview - Tailgate control unit Tailgate control unit, Tailgate closing button in tailgate Discrete communication wire driver side J605 Tailgate control unit, front passenger side J756 Wake-up line Rear right power latching motor Driver door control unit J386 Softtouch handle in tailgate CLS antenna Entry and start authorisation control unit J518 Powertrain CAN bus Data bus diagnostic interface J533 Convenience system central control unit J393 Convenience CAN b
Softtouch in the tailgate Terminal 30 Terminal 30 Convenience CAN bus Convenience system central control unit J393 Power latching system Tailgate lock Tailgate control unit - master J605 Sensors Tailgate control unit - slave J756 Sensors Interior tailgate release Magnetic coupling Magnetic coupling 344_036 ● The tailgate control unit master J605 communicates with the tailgate control unit slave J756 via a singlewire bus specified by systems supplier Valeo (no LIN bus).
Convenience electronics Slave start connectors in the engine bay To make the A6 more service-friendly, slave start connectors are installed in the engine bay of the Audi A6 Avant '05 and the A6 saloon from model year '06. Here, the slave start connectors are much more readily accessible than in the luggage compartment. The slave start connectors are located above the right-hand suspension strut tower. The positive pole is concealed below a red plastic cover.
Self-study programmes on the Audi A6 Avant The New Audi A6 Avant ‘05 Audi is adding a new chapter to the success story of the Avant. The new Audi A6 Avant '05 represents a unique blend of design and dynamism, driving pleasure and functionality. SSP 323 Audi A6 ´05 – – – – Here is a car that exhibits a unity and harmony of design. Measuring 4.93 metres in length, 1.86 metres in width, and 1.46 metres in height, the new Audi A6 Avant ´05 visibly sets a new standard in terms of its proportions.
344 Vorsprung durch Technik www.audi.de Service Training The New Audi A6 Avant ´05 Self-Study Programme 344 All rights reserved. Technical specifications subject to change without notice. Copyright AUDI AG I/VK-35 Service.training@audi.de Fax +49-841/89-36367 AUDI AG D-85045 Ingolstadt Technical status: 02/05 Printed in Germany A05.5S00.13.
