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Audi A6 2005 - Electrics Service Training

Other manuals for A6 2005 - Electrics: Repair Manual, Repair Manual

Summary of A6 2005 - Electrics

  • Page 1

    326 all rights reserved. Subject to technical change. Copyright audi ag i/vk-35 service.Training@audi.De fax +49-841/89-36367 audi ag d-85045 ingolstadt technical release 01/04 printed in germany a04.5s00.09.20 audi a6 ‘05 – electrics self-study programme 326 vorsprung durch technik www.Audi.Co.Uk s...

  • Page 2

    The new audi a6 – the most progressive vehicle takes the lead. The new audi a6 consistently adopts the highly networked electronic architecture, which is already used in the audi a8. Overall, new technologies allow the a6 to match up with its "model" vehicle, the audi a8. Features, which were previo...

  • Page 3: Contents

    Note reference note reference control unit installation positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 bus topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 installation positions o...

  • Page 4: Overview

    4 overview 1 auxiliary heating control unit j364 2 control unit for abs with edl j104 3 control unit for distance control j428 4 transmitter unit in wheel well for tyre pressure monitoring, front left g431 5 control unit for on-board power supply j519 6 door control unit, driver's side j386 7 contro...

  • Page 5

    5 18 rotation rate sensor 202 19 door control unit, passenger's side j387 20 control unit for seat adjustment with memory, passenger’s side, j521 21 door control unit, rear right j389 22 transmitter unit in wheel well for tyre pressure monitoring, rear left g433 23 radio receiver for auxiliary heati...

  • Page 6: Overview

    6 bus topology overview no x sensor j583 rotation rate sensor g202 seat occupied recognition j706 power module for left headlight j667 power module for right headlight j668 level control j197 electric parking and hand brake j540 headlight range control j431 automatic transmission j217 airbag j234 ab...

  • Page 7

    7 326_027 display and operating unit for front information j523 telephone transmitter and for telephone r36 cd changer r41 digital sound package j525 switch for access and start authorisation e415 antenna read-in unit for keyless access authorisation j723 wiper motor j400 sensor for rain and light d...

  • Page 8: Overview

    8 overview installation positions of fuses and relays 1 e box in radiator tank, left 2 relay and fuse holder behind dash panel, left 3 fuse holder in dash panel, left 4 main fuse carrier in radiator tank, right 5 fuse holder in dash panel, right 6 relay and fuse holder in the boot, right.

  • Page 9

    9 326_148.

  • Page 10: Convenience Electrics

    10 the basic design of the control unit for power management is the same as the control unit used in the audi a8 ‘03. It is installed in the boot well, next to the battery. This control unit has been adapted for use in the audi a6 ’05 in that it now has revised software, which shows the battery cond...

  • Page 11

    Audi audi a6 2005> 2005 (5) saloon bbj 3.0l motronic / 160 kw guided fault-finding function/component selection selecting a function or component electrical system (rep. Gr. 01; 90 - 97) 01 – self-diagnosis systems 61 – battery control j644 – control unit for power management, functions a – battery,...

  • Page 12

    Convenience electrics function diagram legend e369 central locking button for outer door handle, driver’s side* e370 central locking button for outer door handle, passenger’s side* e371 central locking button for outer door handle, rear left* e372 central locking button for outer door handle, rear r...

  • Page 13

    15 326_038.

  • Page 14: Convenience Electrics

    16 the advanced key system was introduced with the audi a8 '03 and has been fundamentally revised for the audi a6 ’05. The most important new feature is that the control unit for access and start authorisation has been combined with the actuator for steering column locking. Convenience electrics sys...

  • Page 15

    17 326_147 1 door control unit, driver's side j386 2 control unit for on-board power supply j519 3 control unit for access and start authorisation j518 4 switch for access and start authorisation e415 5 central locking button for outer door handle, driver's side e369 outer door handle switch in driv...

  • Page 16: Convenience Electrics

    18 division of functions system control is broken down into three basic modules: – the control unit for access and start authorisation j518, – the antenna read-in unit for keyless access authorisation j723 and – the switch for access and start authorisation e415. All three components communicate wit...

  • Page 17

    19 versions the switch for access and start authorisation is available in the following versions: – with and without advanced key function – with and without ignition key anti-removal lock – for radio frequencies of 315 mhz, 433 mhz or 868 mhz functions the switch for access and start authorisation ...

  • Page 18: Convenience Electrics

    20 – reading in position p of the automatic transmission from the switch for gearbox position p f305: the signal is used to activate the integrated, magnetic ignition key anti-removal lock. If the vehicle battery is flat, the key can be removed by pressing the mechanical emergency release. – reading...

  • Page 19

    21 the electromechanical steering column lock was integrated into the control unit for access and start authorisation. Functions – terminal control: the control unit for access and start authorisation puts the information about terminal 15, 75x, 50, s and p on can convenience. The control unit also ...

  • Page 20: Convenience Electrics

    22 – can communication: the control unit is a participant on can convenience. Data exchange between all the components of the access and start authorisation system is performed via the control unit. It is also the diagnosis interface for the components involved. All data, e.G. Code, immobiliser data...

  • Page 21

    23 vehicle key the key has a mechanically coded hinged bit for the lock cylinder in the driver’s door and the tailgate/ boot lid. The transponder function is integrated into the electronics and also works without a battery. An integrated battery powers the electronics for the radio remote control an...

  • Page 22: Convenience Electrics

    24 the control unit is only installed together with the advanced key option. It is located at the right of the dash panel, behind the glove compartment. It evaluates the signals from the outer door handle sensors and then activates the antennae for access and start authorisation. The capacity-based ...

  • Page 23

    25 four transmitting antennae are distributed in the vehicle and are used by the vehicle for radio communication with the vehicle key. The antennae transmit on a frequency of 24.5 khz. The vehicle key evaluates all four signals and determines the position in or on the vehicle based on the field stre...

  • Page 24: Convenience Electrics

    26 opening the vehicle convenience electrics 326_055 antenna for central locking and anti-theft warning system r47 antenna on driver’s side for access start authorisation r134 antenna on passenger’s side for access start authorisation r135 passenger compartment antenna 1 for start authorisation r138...

  • Page 25

    27 1 the driver puts his/her hand into the finger well of the door handle. The sensor for outer door handle contact g415 sends the information "finger in finger well" to the antenna read-in unit for keyless access authorisation j723. 2 the antenna read-in unit sends an alarm signal to the vehicle ke...

  • Page 26: Convenience Electrics

    28 starting the vehicle using the button convenience electrics 326_056 antenna for central locking and anti-theft warning system r47 antenna on driver’s side for access start authorisation r134 antenna on passenger’s side for access start authorisation r135 passenger compartment antenna 1 for access...

  • Page 27

    29 1 the driver presses the button for access and start authorisation e408 down fully. The button sends the information about "ignition on" and "engine start" both to the switch for access and start authorisation e415 and to the control unit for access and start authorisation j518. 2 the switch for ...

  • Page 28: Convenience Electrics

    30 immobiliser 4 convenience electrics the immobiliser 4 technology is used in the audi a6 ’05. This means that all components must be "taught" online, as is already the case with the audi a8 ´03 and the audi a3 ´04. The following components are integrated into the immobiliser: – the control unit fo...

  • Page 29

    31 new identity as is already the case with the audi a8 ‘03 , if a control unit is stolen, it is no longer necessary (for safety reasons) to also replace the remaining control units, which are integrated in the immobiliser. In this case, the "new identity" function must be used for the control unit ...

  • Page 30: Convenience Electrics

    32 external lights front headlights three different front headlights are used in the audi a6 ’05: – halogen headlights – bi-xenon headlights – adaptive light halogen headlights halogen headlights come as standard. The following lamps are fitted in the halogen on the vehicle equipment: – w5w lamp for...

  • Page 31

    33 bi-xenon headlights bi-xenon headlights are installed with the "xenonplus" option. The following lamps are fitted in the bi-xenon headlight: – a blue w5w lamp for the parking light. The colour of the parking light thus corresponds to the xenon light. – a d2s lamp for high beam headlight, headligh...

  • Page 32: Convenience Electrics

    34 adaptive light the adaptive light works as a dynamic corner- sensitive headlight. With the dynamic cornering headlight, the headlight projection module is pivoted horizontally by an integrated motor. The headlight lenses and the bracket do not turn. The pivot angle is approx. 15° on the inner cur...

  • Page 33

    35 internal structure the pivot angle is monitored by an inductive pickup in the pivot module. The pickup value is evaluated immediately in the relevant power module for headlights as a pulse width-modulated signal. If the motor or pickup does not function, the power module sends an error message to...

  • Page 34: Convenience Electrics

    36 signal and data exchange the same sensors that are used for dynamic headlight range control for bi-xenon headlights are also used as level sensors. They send a pulse width-modulated signal to the control unit for headlight range control. Data is exchanged between the control unit for headlight ra...

  • Page 35

    37 back lights different tail lights are used in the audi a6 ’05, depending on the equipment variant. This is differentiated into the following: – basic variant ece – high variant ece – high variant sae basic variant ece the tail light in the basic variant only uses lamps with a 15-mm bayonet socket...

  • Page 36: Convenience Electrics

    38 high variant ece these back lights are installed if bi-xenon headlights at least are fitted as the front headlights. The external feature of the high back lights is the use of leds for the brake light. The leds, which are fixed in the reflector housing, are activated by two contacts from the lamp...

  • Page 37

    39 high variant sae the back lights for the north american market have standard led units. The led units are used for the indicator and brake light function. The three sections underneath are for the tail light lamps. The sae back lights have two rear fog lights and two reversing lights. Led unit di...

  • Page 38: Convenience Electrics

    40 the control unit in dash panel insert j285 is available in two variants. The high-line variant with colour display only comes in vehicles with adaptive cruise control. As in the a8 '03, the anti-drive-off feature and gateway are no longer integrated into the dash panel insert. The handy position ...

  • Page 39

    41 function diagram legend e493 operating button for dash panel insert f1 oil pressure switch f34 warning contact for brake fluid level e66 switch for low coolant display f77 warning contact for windscreen washer level g sender for fuel level indicator g6 pre-feed fuel pump g17 temperature sensor fo...

  • Page 40: Convenience Electrics

    42 functions the main function of the control unit for on-board power supply is to read in switch information and activate power outputs. It is familiar from the audi a8 ‘03 and has been adapted to new functionalities in the audi a6 ´05. Master functions the following master functions are implemente...

  • Page 41

    43 emergency function the software for the control unit for on-board power supply can be used to implement emergency functions. If a fault is detected in the rotary light switch or if there is an open circuit in the line to the rotary light switch, the control unit for on-board power supply switches...

  • Page 42: Convenience Electrics

    44 function diagram convenience electrics e1 light switch e3 hazard warning light switch e7 fog light switch e18 switch for rear fog light f4 reversing light switch f266 contact switch for bonnet g357 sender for vertical steering column adjustm. G358 sender for axial steering column adjustment g397 ...

  • Page 43

    45 n395 magnet for cover adjustment, left headlight n396 magnet for cover adjustment, right headlight v5 windscreen washer pump v48 left control motor for headlight range control v49 right control motor for headlight range control v123 motor for vertical steering column adjustment v124 motor for axi...

  • Page 44: Convenience Electrics

    46 system overview convenience electrics – hall sender 1 for vertical adjustment of the steering column – hall sender 2 for axial adjustment of the steering column – bonnet switch for anti-theft warning system – rotary light switch – hazard warning button – switch for reversing light (manual transmi...

  • Page 45

    47 diagnosis basic settings after the control unit for on-board power supply j519 or the steering column or the switch for steering column adjustment e167 is replaced, a basic setting in axial and vertical position must be implemented for the steering column. Actuator test an actuator test can be us...

  • Page 46: Convenience Electrics

    48 a combined sensor for rain and light detection is used for the first time in the audi a6 ’05. The sensor includes a light-control assistant function, which relieves the driver of the job of having to switch the driving light on manually, as well as a wiper control function, which depends on the a...

  • Page 47

    49 function of the light sensor in order to detect certain ambient conditions, such as tree-lined avenues or routes through tunnels, the light sensor registers the light intensity in two areas. The global field describes the direct brightness on the vehicle, while the fore-field describes the lighti...

  • Page 48: Convenience Electrics

    50 function of the rain sensor the rain sensor uses the physical light refraction principle to register the amount of moisture on the windscreen. The circular leds integrated in the sensor emit infrared light through the windscreen from within the interior of the vehicle. If the windscreen is dry, t...

  • Page 49

    51 the control unit for wiper motor j400 was redesigned for use in the new audi a6 ’05. As is already the case in the audi a8 ‘03 and audi a3 ’04, the control unit and wiper motor are integrated into one housing. It is linked to the control unit for on-board power supply j519 as a lin-slave control ...

  • Page 50: Convenience Electrics

    52 an additional on-board power supply control unit is needed in the audi a6 ´05 because of the huge range of functions it offers. Functions control unit 2 for on-board power supply j520 includes the following functions: – activate the solenoid valve for servotronic n119 – sliding roof convenience o...

  • Page 51

    53 function diagram 326_082 legend e316 glove compartment button j520 control unit 2 for on-board power supply n119 solenoid valve for servotronic v1 motor for sliding roof v327 motor for glove compartment release additional signals 1 can convenience high 2 can convenience low.

  • Page 52: Convenience Electrics

    54 the tilt sensor for the anti-theft warning system is integrated directly in control unit 2 for on-board power supply j520 in the new audi a6 ‘05. The fluid-filled sensor registers changes in the vehicle tilt both transversely and longitudinally, thereby preventing incorrect triggering as a result...

  • Page 53

    55 the central control unit for the convenience system j393, with which you may be familiar from the audi a8 '03, is used in the audi a6 ’05. The tasks and functions have been adapted according to requirements. The control unit is a participant on the can convenience data bus. Master functions the m...

  • Page 54: Convenience Electrics

    56 326_121 installation position the central control unit for the convenience system is installed above the battery in the rear right of the boot. System overview convenience electrics – tailgate/boot lid "softtouch" – tailgate/boot lid locking cylinder closed – brake light switch – brake light sign...

  • Page 55

    57 interior lighting control standard equipment function the standard function includes activating the inside light in the roof lining, the front footwell lights, the glove compartment light and the boot light. The central control unit for the convenience system j393 activates the inside light in th...

  • Page 56: Convenience Electrics

    58 function diagram convenience electrics c18 interference filter for windscreen antenna e26 switch for glove compartment light f124 contact switch for lock cylinder for tailgate/boot lid, anti-theft warning system, central locking f147 contact switch for make-up mirror driver’s side f148 contact sw...

  • Page 57

    59 326_120 v53 motor for tailgate/boot lid central locking v91 motor for rear sun blind v155 motor for tank cap locking w6 glove compartment light w14 illuminated make-up mirror, passenger’s side w18 boot light, left w20 illuminated make-up mirror, driver’s side w35 boot light, right w45 footwell li...

  • Page 58: Convenience Electrics

    60 diagnosis the central control unit for convenience system, j393, has the usual diagnostic functions, such as read fault memory, read measured value blocks, adaptation, coding, as well as selective and sequential actuator test at its disposal. Actuator test the selective actuator test initiated by...

  • Page 59

    61 you may already be familiar with the acoustic parking aid function "aps" from the audi a3 ´04. For use in the audi a6 ´05, a 4-channel system with sensors on the rear bumper and an 8-channel system with sensors on the front and rear bumpers are available. Versions the parking aid control unit wil...

  • Page 60: Convenience Electrics

    62 326_119 input and output signals the parking aid control unit j446 requires can bus messages from various control units. 4-channel system control units: convenience electrics control unit for on-board power supply j519 reversing light on control unit for trailer detection j345 trailer detected da...

  • Page 61

    63 the door control units have a similar functionality to those used in the audi a8 ´03 and are used in the audi a6 ’05 with appropriately adapted functions and actuation features. The separate installation of the door control unit and the power windows motor is new here. Stand-by master function as...

  • Page 62: Convenience Electrics

    64 system overview convenience electrics – power windows switch – internal locking switch – actuating elements for central locking – actuating elements for central locking (safe mode) – outer door handle switch (optional) – central locking button for outer door handle – boot release switch e164 – sw...

  • Page 63

    65 the control units for seat adjustment can be used to set up to 8 individual seat positions for an electrically adjustable seat. The seat positions can be stored in memory and can be set again if necessary using the memory keypad or by entering a radio code. Installation position the control units...

  • Page 64: Convenience Electrics

    66 input and output signals (driver’s seat) convenience electrics function the control unit for seat adjustment powers the positioning motors in the seat directly using its load outputs. The position detection function of the positioning motors is implemented using hall sensors. The driver’s-side do...

  • Page 65

    67 seat symmetry positioning the "symmetry positioning, driver’s seat/ passenger’s seat" option, which is available in the mmi, can be used to move the passenger’s seat into a symmetrical position in relation to the driver’s seat. The mmi sends a corresponding instruction to the driver’s seat contro...

  • Page 66: Infotainment

    68 multimedia interface (mmi) equipment versions as in the current audi a8 ’03, the mmi operating concept is now also integrated as standard in the new audi a6 ’05. Data is transferred between the individual infotainment control units via most bus technology and the process is technically identical ...

  • Page 67

    69 mmi basic standard equipment in the new audi a6 includes mmi basic with the mmi operating concept, a 7" monochrome display (j685) in the dash panel insert as well as an integrated, analogue radio tuner and 4x antenna diversity, cd drive and a 2x20-watt amplifier. In principle, these drivers are a...

  • Page 68: Infotainment

    70 mmi basic plus as an option, the mmi basic system can be equipped with additional functions in the radio and sound field in the form of a "plus" version. This includes, for example, a tp memo function, which enables the recording of traffic announcements for a duration of eight minutes in total. ...

  • Page 69

    71 mmi basic navigation the mmi basic plus is available on request with a basic navigation function. For this purpose, a navigation module is integrated into the information control unit j523. Optical route guidance is provided on the central display in the dash panel insert. The destination is ente...

  • Page 70: Infotainment

    72 mmi high the mmi high comes with the 7" colour display. The standard equipment of the top system in audi a6 ‘05 infotainment includes an rds dual- tuner, the standard sound system and a 6x cd changer in the glove compartment. As an optional extra, this mmi version is also available with dvd navig...

  • Page 71

    73 function overview and menu structure of the mmi operator system ● radio main menu – dynamic transmitter list ❍ memory – memory list ❍ band – fm (ultra-short wave) – mw (medium wave) – lw (long wave) – dab* (digital radio) ❍ sound – softkey sound> ❍ manual – manual f orward – search forward – save...

  • Page 72: Infotainment

    74 infotainment legend ● hardkey ❍ softkey – sub-menu – function * available later ● navigation navigation – mode> – country – city/postal code – street – special dest. – route guidance start – – z-destination 1...3 – destination ❍ memory – last destinations – top special dest. – destination from ad...

  • Page 73

    75 antenna systems the antenna system in the new audi a6 ´05 is integrated as a module in the top area of the rear window, to the left and next to the third brake light, on the right. The modules are responsible for the various systems, e.G. Remote central locking, radio, tv or the radio receiver fo...

  • Page 74: Infotainment

    76 if you order the audi a6 ´05 with the mmi versions basic, basic plus or basic navigation, the functionalities like sound system or a cd-based navigation module are integrated into the control unit for front information j523, depending on the vehicle equipment. The control unit for front informati...

  • Page 75

    77 the control unit for front information j523 includes an enhanced tp recording system in the standard plus and standard navigation versions. This is a programmable traffic programme recording function, which is possible via the mmi operating system. Two different start times can be set. The traffi...

  • Page 76: Infotainment

    78 although functional modules are integrated into the control unit for front information j523, the related address words for diagnosis in the vag tester are retained. The control unit for front information j523 does not support the basic setting and actuator test functions. The control unit for inf...

  • Page 77

    79 overview of the measured-value blocks available for the individual modules module designation general measured-value blocks for all modules general: battery positive voltage, terminal status most: address, most fot temperature, optical lowering status of ring break diagnosis line control unit ide...

  • Page 78: Infotainment

    80 versions: basic, basic plus and basic navigation infotainment decimal place description 1. Country version: d, gb, usa, f, e, i, p 2. Equipment: acc, internal light package, acoustic parking system, front 3. Equipment: acoustic parking system, rear, tyre pressure control system, air suspension 4....

  • Page 79

    81 sound systems different sound system versions are available for the new audi a6 ´05. A general feature of the systems is the two subwoofers integrated into the front doors. A central subwoofer is not installed in the rear storage area in the audi a6 ’05 – a standard feature in other model series....

  • Page 80: Infotainment

    82 standard sound system if the optional standard sound system is selected, the vehicle will not have the 2x20-watt amplifier module in the control unit for front information j523. This sound system has an external 7-channel dsp amplifier, the digital sound system control unit j525, which is integra...

  • Page 81

    83 standard sound system diagnosis the diagnosis process is effected via address word 47 as in the case of the series equipment, however, the separate control unit for digital sound system, j525, is now addressed. In addition to reading the measured-value blocks and the fault memory for all loudspea...

  • Page 82: Infotainment

    84 bose sound system the new audi a6 ´05 comes with a bose sound system, which mainly comprises components from the current audi a8 ‘03. The division of the subwoofer function into two individual subwoofers integrated into the front doors means that the well-known 7-channel dsp bose amplifier must p...

  • Page 83

    85 measured-value block designation 01 general: battery positive voltage 02 most: most address, fot temperature 03 status of ring break diagnosis line 04 system: analogue/digital unit temperatures in amplifier, fan speed 05 microphone: microphone voltage(s) for audiopilot microphone and optical micr...

  • Page 84: Infotainment

    86 available telephone systems two different telephone systems are available ex-works for the new audi a6 ´05. Firstly, there is the fixed system with bluetooth operator handset, with which you may be familiar from the current audi a8 ´03, but which can only be ordered with the high version of the m...

  • Page 85

    87 the telephone transmitter and receiver r36 is fitted as standard with a bluetooth module. In principle, the bluetooth functionality is always available, even if a mobile phone holder is not connected. For reasons of electromagnetic compatibility, bluetooth is only active at present when the mobil...

  • Page 86: Infotainment

    88 handsfree operation the telephone transmitter and receiver r36 sends the signals for handsfree operation (voice, phone mute, etc.) via the most infotainment bus to the relevant sound system, which is either integrated into the control unit for front information j533 or the independent digital sou...

  • Page 87

    89 mobile baseplate diagnosis the mobile baseplate is diagnosed as standard using the address word 77 in the vas tester. A selective or sequential actuator test can be performed to check the output of the audio signal to the relevant sound system, radio mute operation, and whether or not a switched-...

  • Page 88: Infotainment

    90 actuator test the actuator tests listed in the table can be called up using the guided fault-finding function in the diagnosis tester. Most of these can be activated selectively (individually). Possible actuator tests infotainment adaptation channel designation 128 basic audio volume 129 mobile a...

  • Page 89: Notes

    91 notes.

  • Page 90: Notes

    92 notes.

  • Page 91

    Ssp 324 audi a6 ´05 chassis – front axle technology – rear axle technology – steering system – esp – electromechanical parking brake epb order no.: a04.5s00.07.00 ssp 326 audi a6 ´05 electrics – networking – bus topologies – convenience electrics – infotainment order no.: a04.5s00.09.00 ssp 323 audi...

  • Page 92: 326

    326 all rights reserved. Subject to technical change. Copyright audi ag i/vk-35 service.Training@audi.De fax +49-841/89-36367 audi ag d-85045 ingolstadt technical release 01/04 printed in germany a04.5s00.09.20 audi a6 ‘05 – electrics self-study programme 326 vorsprung durch technik www.Audi.Co.Uk s...