AUDI A6 2005 C5 / 2.G Electrics System Training Manual

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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 loudspeaker channels involved,
selective actuator tests are also available.
The digital sound system control unit participates in
component protection.
Measured-value blockDesignation
01General: Battery positive voltage, terminal status
02MOST: MOST address, FOT temperature, optical lowering (0 dB, -3 dB)
03Status of ring break diagnosis line
04System: Analogue/digital unit temperatures in amplifier, fan speed
05Microphone: Voltage readings at microphone inputs
50Control unit identification: Year of manufacture, manufacturer code
51Control unit identification: Serial number
No.DesignationActuator test
SequentialSelective
1Mid/high-pitch loudspeaker, front left R26XX
2Mid/high-pitch loudspeaker, front right R27XX
3High-pitch loudspeaker, rear left R14XX
4Mid/low-pitch loudspeaker, rear left R159XX
5High-pitch loudspeaker, rear right R16XX
6Mid/low-pitch loudspeaker, rear right R160XX
9Low-pitch loudspeaker, front left R21XX
10Low-pitch loudspeaker, front right R23XX
Available actuator tests

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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
provide an additional output for the second
subwoofer driver in the front right-hand door. The
line-out output of the amplifier is used for this
purpose. This output signal feeds an external 100-
watt driver, which is integrated into the subwoofer
in the front right-hand door.
The current BOSE amplifier is replaced by a new
development with the launch of the Avant.
All eight drivers for the BOSE sound system are
then integrated into this new Avant amplifier.
Given this, it will be impor tant to note the exact par t
numbers and the related model year when replacing
components of the BOSE sound system in the
future, so that the functionality of the BOSE sound
system is not lost!
BOSE sound system diagnosis
Diagnosis of the BOSE sound system is also
performed using the address word 47 in the
VAS tester.
A basic setting is not required.
The available actuator tests can be performed either
selectively or sequentially.
The AudioPilot microphone, which is integrated into
the BOSE sound system, can be used to absorb
the acoustic pressure produced during the
loudspeaker actuator tests and output this on the
VAS diagnosis tester as a voltage signal.
If a voice operating system is installed, the
microphone for this is also included in the test.
The technician must then compare this voltage
reading with a default reading set at the factory and
evaluate the completed test as either OK or Not OK.
Infotainment
326_060
1 High-pitch loudspeaker, front left R20
2 Middle-pitch loudspeaker, front left R103
3 Low-pitch loudspeaker, front left R21
4 High-pitch loudspeaker, rear left R14
5 Mid/low-pitch loudspeaker, rear left R159
6 Control unit for digital sound package J525
7 Mid-range/treble loudspeaker, centre, R158
8 Microphone unit in front roof module R164
9 Loudspeaker in parcel shelf R150
10 High-pitch loudspeaker, front right R22
11 Middle-pitch loudspeaker, front right R104
12 Low-pitch loudspeaker, front right R23
13 High-pitch loudspeaker, rear right R16
14 Mid/low-pitch loudspeaker, rear right R160
5 4 3 17
2
98
614 13 12 10
11
Note
Always note the exact part numbers when
replacing components of the BOSE sound
system!

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Measured-value blockDesignation
01General: Battery positive voltage
02MOST: MOST address, FOT temperature
03Status of ring break diagnosis line
04System: Analogue/digital unit temperatures in amplifier, fan speed
05Microphone: Microphone voltage(s) for AudioPilot microphone and optical microphone
for voice operating system
50Control unit identification: Manufacturer code
51Control unit identification: Serial number
No.Brief description and designation
of the component to be testedActuator diagnosis
SequentialSelective
1R21Low-pitch loudspeaker, front leftXX
2R23Low-pitch loudspeaker, front rightXX
3R20High-pitch loudspeaker, front leftXX
4R22High-pitch loudspeaker, front rightXX
5R14High-pitch loudspeaker, rear leftXX
6R16High-pitch loudspeaker, rear rightXX
7R103Middle-pitch loudspeaker, front leftXX
8R104Middle-pitch loudspeaker, front rightXX
9R158Centre loudspeakerXX
10R150Loudspeaker in parcel shelfXX
11R159Mid/low-pitch loudspeaker, rear leftXX
12R160Mid/low-pitch loudspeaker, rear rightXX
13Fan in control unitX
14J525Self-test for digital sound package control unitX
Available actuator tests

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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 MMI. Secondly, there is the newly developed mobile
baseplate. This mobile baseplate has a similar
control unit architecture and functionality to the
system used in the Audi A3 ´04.
However, it has now been incorporated into the
MOST bus for Infotainment.
Infotainment
1 Telephone transmitter and receiver R36
2 Telephone holder R126
3 Control unit for information J523
4 Microphone R140
5 Control unit for digital sound package J525
Basic or BOSE sound system
6 Data bus diagnosis interface J533 7 Control unit in dash panel insert J285
8 Control unit for steering column electronics J527
9 Control unit for multi-function steering
wheel J453
10 Mobile phone amplifier (compensator) R86
11 Antenna for GPS navigation R50
12 Bluetooth antenna R152
Reference
For information on the telephone system,
please refer to the SSP 293,
Audi A8 ´03 – Infotainment
326_070 11 10212
41
5
367
8
9

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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 mobile phone is inserted into the relevant
holder. The phonebook stored on the mobile phone
SIM card is read into the memory of the Telephone
transmitter and receiver R36 whenever the mobile
phone is inserted. Mobile-internal phonebooks
cannot be read in because the data formats differ
from model to model. The mobile baseplate is operated via the MMI in the
"TEL" menu. The telephone holder R126, which is
required for whichever type of mobile phone is to be
used, is available from the Parts Service. As you may
already know from the introduction of the new
mobile baseplate in other model series (Audi A3, A4,
TT), this mobile phone holder no longer has a
connection cable. It is connected to the telephone
transmitter and receiver R36 via a contact panel.
Voice operation
The new mobile baseplate can be voice-operated
using the operating unit in the steering wheel E221.
The handsfree volume can also be set using the
multi-function steering wheel and names or
telephone numbers can be dialled in the
phonebook. The operating unit in the steering
wheel E22 1 passes the data si gnals fo r this on to the
steering column electrics J527 as LIN signals.
This control unit converts the data into CAN
messages and transfers these messages to the data
bus diagnosis interface J533 on CAN Convenience.
Here, the digital data messages are converted into
MOST data records and are passed to the telephone
transmitter and receiver R36 via the MOST ring.
The adapter set always includes a Push-to-talk
button (PTT), which enables voice operation even
without the multi-function steering wheel option.
This button is included on every available mobile
phone adapter.
The PTT button has different functionalities,
depending on the MMI used:
– MMI High: Accept/Hang up
– MMI Basic/Basic Plus/Basic Navigation:
Accept/Hand up and also
Activate internal voice operation of the
telephone transmitter and receiver R36.
This internal voice operation function is only
available in the MMI Basic versions. Voice operation
in the MMI High version is implemented via the
optional control unit for voice input J507.
326_106
This illustration depicts the service handset for the fixed telephone
installation (MMI High) and the alternative universal mobile
baseplate with the mobile adapter. A vehicle cannot be fitted with
both systems!

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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 sound system control
unit J525. Here, the digital data is converted into
analogue data and is output on the loudspeaker.
Echo and noise compensation
The telephone transmitter and receiver R36 is fitted
as standard with a DSP-based echo compensation
system. If the optional voice operating system is
also ordered, the echo and noise compensation
function of the control unit for voice input J507 is
used. Among other things, this results in an
improved handsfree quality, even for the passenger.
Infotainment
Microphone arrangement in the MMI High version Microphone arrangement in the MMI versions Basic, Basic Plus and
Basic Navigation.
Microphone, front
left R140 Control unit for
information J523Te l e p h o n e
transmitter and
for telephone
R36
326_136
Microphone unit in
front roof module
R164Microphone, front
left R140
A / D
Amplifier Control unit for
digital sound
package R525 Te l e p h o n e
transmitter and
receiver R36
326_137 Control unit for
voice input
J507

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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-on phone was
detected.
Measured-value blocks
Measured-value blockDesignation
01General: Battery positive voltage
02MOST: MOST address, FOT temperature
03Status of ring break diagnosis line
05Input signals: PTT, Mobile inserted, Mobile switched on, Communication active
10Reception field strength of the mobile phone
11Status of external antenna for mobile baseplate
14Currently connected Bluetooth devices
19Microphone: Microphone voltage, microphone power consumption
20Number of bonded (known) Bluetooth devices
48Cut-off level of control unit for power management J644
80Control unit identification: Manufacturer codes
81Control unit identification: Serial number
130Status of Bluetooth antenna

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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 channelDesignation
128Basic audio volume
129Mobile after-run time, from 30 seconds to 30 minutes in seven intervals
130Reference channel wait time for synchronisation with audio components
131Microphone-sensitivity
133Bluetooth on/off
134Bluetooth: Handsfree operation only with mobile phone inserted
135Change Bluetooth PIN
136Beep Delay value: Time gap between pressing button and acknowledgement beep
Mobile baseplate adaptation
No.DesignationActuator test
SequentialSelective
1"Phone on" signalXX
2Audio lead adapter setX
3Communication lead to adapter setX

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Notes

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Notes