NHTSA ID Number: 10250641
Manufacturer Communication Number: 990143
TSB/Document Date: 2024-02-26
Summary
The 2015 Audi
A3 Introduction
Selector Lever
Sensor System
Control Module
J587
*2.0L TDI engine only
63
Fresh Air Blower
Control Module
J126
Refrigerant Circuit
Pressure Sensor
G805
Humidity Sensor in
Fresh Air Intake
Duct
G657
Air quality sensor
G238
For example, Cornering Lamp and Headlight Range Control
Module J745 would never be installed on the same vehicle
as Headlamp Range Control Module J431.
Headlamp Range
Control Module
J431
Multimedia System
Control Head
E380
Cornering Lamp and
Headlight Range
Control Module
J745
Front Information
Display Control
Head J685
Lane Change
Assistance Control
Module
J769
Digital Sound
System Control
Module
J525
Driver Assistance
Systems Front
Camera
J842
Distance Regulation
Control Module
J428
Information
Electronics Control
Module 1
J794
ABS/ESP
Control Module
J104
Battery Monitoring
Control Module
J367
Power Steering
Control Module
J500
All Wheel Drive
Control Module
J492
Rearview Camera
System Control
Module
J772
Electronic Damping
Control Module
J250
610_001_pkd
Key:
Powertrain CAN bus
Infotainment CAN bus
LIN bus
Convenience CAN bus
Diagnostics CAN bus
Sub-bus systems
Extended CAN bus
Suspension CAN bus
MOST bus
64
Climate control
Introduction
Heating / air conditioning system
versions
Two heating and air conditioning systems are specified for
the 2015 Audi A3 depending on model.
•
•
manually controlled air conditioning system
Climatronic
The Climatronic system has a moisture and enthalpy
control system. The moisture control system is used to
detect windshield fogging.
Enthalpy is a measure of the energy content in the air
conditioning system. Air conditioning efficiency is ensured
by precision control of the fresh air to recirculated air ratio
inside the vehicle.
Climatronic Control Module
J255
A/C Compressor Regulator Valve
N280
625_044
65
Operation
The two versions differ from one another with respect to
their equipment specification. All versions are optionally
available with seat heater control buttons. The seat heater
is a three-stage system and the selected heating level is
indicated by an LED in the respective button.
Both versions have a dust and pollen filter. The Climatronic
system has an activated charcoal dust and pollen filter. In
combination with the Air Quality Sensor G238, the activated charcoal component in the filter works to reduce
pollutant emissions in the fresh air inside the vehicle.
Some of the rotary controls in both versions have multiple
functions, such as for turning cooling or automatic air
conditioning ON and OFF.
The dust and pollen filter can be replaced through the open
glove compartment.
The table shows an overview of the main functions of the individual versions:
Manual air conditioning system
Climatronic
Control panel and control
module
A/C Control Module J301
Climatronic Control Module
J255
Functions on the control panel
Three rotary controls for:
• Temperature
• Blower
• Air distribution
Manual air recirculation button
Heated rear window button
Optional seat heater button,
three-stage
AC button
Two rotary controls for driver
and passenger side outlet temperature
AC button
AUTO button
Rotary blower control
Defrost button
Manual air recirculation button
Heated rear window button
Three buttons for setting the air
distribution
Optional seat heater button,
three-stage
Number of temperature zones
1
2
Air flow and air distribution in
the occupant cell
Defroster vents
Instrument panel outlets, leftcenter-right
Footwell outlets, right/left
Rear footwell outlets, right/left
Defroster vents
Instrument panel outlets, leftcenter-right
Footwell outlets, right/left
Rear footwell outlets, right/left
Rear outlets
Moisture and enthalpy
control
no
yes
AC modes
no
Two AC modes
• normal
• eco
Automatic air
recirculation control
no
yes
Air quality sensor
no
yes
Sun sensor
no
yes
Interior moisture sensor
no
yes
Exterior moisture sensor
no
yes
Glove compartment cooling
no
no
66
Connected components
Manual air conditioning system
Powertrain CAN bus
Convenience CAN bus
LIN
609_031
A/C Control Module J301 evaluates sensor signals and
controls the actuators of the A/C system. Refrigerant
Circuit Pressure Sensor G805 communicates with J301
through a LIN bus.
67
Depending on vehicle engine type, both air conditioning
systems may have Coolant Shut-off Valve N82 or an Auxiliary Heater Heating Element Z35.
Connected components
Climate control
Powertrain CAN bus
Convenience CAN bus
LIN
609_032
To control the internal energy (enthalpy) of the climate
control system, Climatronic Control Module J255 requires
additional information about the relative humidity of the
outside air as well as that of the interior.
To this end, Humidity Sensor G355 supplies interior air data
to J255 via the Convenience CAN bus. Outside air humidity
data is sent directly to J255 by a LIN signal from Humidity
Sensor in Fresh Air Intake Duct G657.
Key to figures on pages 63 and 64:
E230 Rear Window Defogger Button
E653 Left Seat Heating Button
E654 Right Seat Heating Button
G17
G92
G107
G135
G150
G151
G192
G220
G221
G238
G263
G355
G397
G642
G644
Outside Air Temperature Sensor
Temperature Regulator Door Motor Position Sensor
Sunlight photosensor
Defroster Door Motor Position Sensor
Left Vent Temperature Sensor
Right Vent Temperature Sensor
Footwell Vent Temperature Sensor
Left Temperature Door Potentiometer/Actuator
Right Temperature Door Potentiometer/Actuator
Air quality sensor
Evaporator Vent Temperature Sensor
Humidity Sensor
Rain/Light Recognition Sensor
Front Air Distribution Door Motor Position Sensor
Fresh Air/Recirculating Air/Back Pressure Door Motor
Position Sensor
G645 Air Distribution Door Motor Position Sensor
G657 Humidity Sensor in Fresh Air Intake Duct
G805 Refrigerant Circuit Pressure Sensor
J126
J255
J301
J519
J533
Fresh Air Blower Control Module
Climatronic Control Module
A/C Control Module
Vehicle Electrical System Control Module
Data Bus On Board Diagnostic Interface
J623 Engine Control Module
N82 Coolant shutoff valve
N280 A/C Compressor Regulator Valve
V2
V68
V107
V113
V158
V159
V425
V426
V428
Fresh air blower
Temperature Regulator Door Motor
Defroster Door Motor
Recirculation Door Motor
Left Temperature Door Motor
Right Temperature Door Motor
Fresh Air/Recirculating Air/Back Pressure Door Motor
Front Air Distribution Door Motor
Air Distribution Door Motor
Z35
Auxiliary Heater Heating Element (in diesel models)
68
Infotainment
In response to the speed at which the development cycles
for information and entertainment systems occur, the
automotive industry has had to shorten its development
cycles as well. Keeping up to date with the latest advances
is a growing challenge for car makers.
To meet this challenge, the Volkswagen Group has introduced the Modular Infotainment Platform (MIB).
Central to the development of the MIB, Information Electronics Control Module 1 J794, has been re-designed as a
modular component. The control module architecture
allows the hardware to be easily and economically updated
so that it always incorporates the latest technological
advances.
An important component is the graphics processor made by
market-leader Nvidia, with whom Audi enjoys a very successful business relationship. The latest Nvidia processors
will continue to be used in Audi vehicles in the future. The
new platform means that it will be possible to use the
same central processing units (J794) across the entire
Group. So, in the future it will be possible to run brand
specific variants on four standardized hardware platforms.
Overview of versions
In the North American market, the following versions of
the MIB will be available on the 2015 Audi A3:
•
•
Standard MIB - MMI radio
High-spec MIB
•
MMI navigation plus
•
MMI navigation plus with Audi connect
Click here for a closer look at the Audi
A3 sedan Modular Infotainment
System.
Reference
For more information about the infotainment systems of the 2015 A3, please see eSelf-Study Program 970143,
Modular Infotainment Platform (MIB).
69
Standard MIB - MMI radio
High spec MIB
MMI navigation plus
High spec MIB
MMI navigation plus with Audi connect
5.8“ TFT colour monitor with
400 x 240 pixel resolution
5.8“ TFT colour monitor with
400 x 240 pixel resolution
7.0“ TFT colour monitor with
800 x 480 pixel resolution
2D navigation system
3D hard drive navigation system
MMI touch
AM/FM radio with phase diversity
AM/FM radio with phase diversity and TMC
tuner
AM/FM radio with phase diversity and background tuner
Car menu
Car menu
Car menu
CD drive (MP3, WMA, AAC )
CD drive (MP3, WMA, AAC)
DVD drive (audio/video, MP3, AAC, WMA,
MPEG4)
1 SD card reader (SDHC cards with up to
32 GB of memory)
2 SD card readers (SDHC cards with up to
32 GB of memory)
2 SD card readers (SDHC cards with up to
32 GB of memory)
1)
approximately 10 GB for jukebox
AUX (with AMI)
Audi music interface with iPod cable (UE7)
Audi music interface with iPod cable (UE7)
Audi Sound System (9VD)
Audi Sound System (9VD)
Audi Sound System (9VD)
Bluetooth interface for HFP and A2DP
(9ZX)
Bluetooth interface for HFP and A2DP
(9ZX)
Speech dialogue system
Premium speech dialogue system
1 sim card reader
Bluetooth interface for HFP and A2DP
(9ZX) and speech dialogue system
Optional
Audi music interface with iPod cable
(UE7)
Bluetooth car phone BTA (market-dependent,
Audi connect incl. car phone)
(9ZK)
SDARS HD radio
(QV3)
1)
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TSB/Document ID: 990143
Replacement Service Bulletin Number:
MFR Communication Date: 2013-12-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
MFR Component System:
MFR Component Subsystem:
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