Right Center Vent
G627

Right Rear Bench
Seat Heating
Element
Z12

Right Rear Backrest
Heating Element
Z13

Rear A/C Display Control Head
E265

Front A/C Display
Control Head 3
E776

Front A/C Display
Control Head 4
E777

Front A/C Display
Control Head 5
E778

Left B-Pillar/Footwell Shut-Off Door
Motor
V212

Left Rear Upper
Body Vent Motor
V315

Front A/C Display
Control Head 6
E884

Switch Module in
Instrument Panel,
Center
EX22

Left Rear Bench
Seat Heating Element
Z10

Left Rear Backrest
Heating Element
Z11

Rear Window
Defogger Button
E230

Left Rear Heated
Seat Temperature
Sensor
G94

Left Rear Seat
Backrest Temperature Sensor
G808

Rear Fresh Air
Blower Control
Module
J391

Rear Fresh Air
Blower
V80

Key:

Infotainment CAN
Comfort/convenience systems CAN 2

LIN bus

MIB CAN

Discrete cable

Diagnostics CAN

Ethernet port for diagnose interface VAS 6154

665_015

19

Air quality and freshening quality
Interior fragrance system
An air freshening system will be offered on the 2019 Audi
A8 in addition to the air quality functions used on the
previous model.
There is a choice of two fragrances: a summer fragrance
and a winter fragrance. The choice of scent and scent intensity can also be set via Front Information Display Control
Head J685 while driving. The actual scent fill level is also
indicated.

The fragrances are stored in two cylindrical bottles in Fragrance System Functional Unit GX43 located to the left of
the steering wheel below the instrument panel. A small fan
the blows the fragrance from the container into the outer
front air outlets. The fragrance bottles are referred to as
“flacons” in the service literature.

Overview of aromatization and air quality systems

Air Freshening System Control Module
J1101

Driver Side Ionizer
J1105

Front Passenger Side Ionizer
J1106

Fragrance Diffuser System
Blower V686

Air Ionization System Control Module
J897
Hose
665_016

Fragrance System Functional Unit
GX43

Fragrance bottle 1
Fragrance bottle 2

Each of the bottles used in the Fragrance System Functional Unit GX43 is labelled with the fragrance it contains.

Note
The fragrance bottles are only replaceable by service personnel. After replacement, Air Freshening System Control Module
J1101 must be adapted using the VAS Scan Tool.

Note
To avoid installation errors, the bottles should be replaced in sequence. Both fragrance bottles have left hand threads.

20

Air improvement system
Ionizers improve air quality through the controlled negative charging of air particles before they are discharged into
the interior from the outer front air outlets. The negative
ions in the air can help enhance the well-being and concentration of the vehicle's occupants.

The two ionizers, Driver Side Ionizer J1105 and Front Passenger Side Ionizer J1106 can be replaced individually. The
electrodes can be replaced separately and must not be
damaged. It is important to pay attention to the color
codings of the wires when installing new electrodes.

Ionization can reduce the concentration of harmful airborne particles and germs and improves air quality inside
the interior.

Air Ionization System Control Module
J897

Front Passenger Side Ionizer
J1106

Ionizer electrodes

665_035

21

AC control panels in the front and rear
Front area
The Audi A8 no longer requires the Climatronic Control
Module J255. The AC is operated via two touchscreens.
Control is now implemented in Vehicle Electrical System
Control Module 1 J519. The LIN bus system is used for
communication between J519 and the participating AC
components. Refer to the topology for further information.

In terms of visual appearance and tactile feel, both displays
are the key innovation in terms user operation. The upper
MMI display and the lower touchscreen are installed at the
center of the instrument panel and at the center of the
center console respectively. The climate control functions in
the upper MMI display can be accessed via the Car menu.

Overview of the MMI display for AC operation

665_019

Depending on trim level, the following functions and their
settings can be selected at Front Information Display
Control Head J685:
››
››
››
››
››
››

22

Ionization.
Aromatization.
Steering wheel heating.
A/C synchronization for driver and front passenger sides.
Climate control for rear occupants / for rear.
Climate control.

Overview of lower touchscreen for climate control operation

665_020

Individual climate control functions can be set separately for the driver and front passenger sides with
Front Information Display Control Head 2 J1060.
››
››
››
››
››
››
››

Temperature.
Fan speeds.
Air distribution.
Seat heater.
Seat ventilation.
Climate control functions.
Air recirculation.

›› Rear roller blind operation.
›› Zoom in display.
(creates space for shortcuts in upper half of screen).
›› Automatic start/stop.
›› Switching display on / off.

Overview of climate control synchronization function

Home

665_021

The climate control settings can also be synchronized by using a touch control feature. Synchronization is
activated by pinching two fingers together and deactivated by spreading two fingers apart.

23

Rear area
Various control panels are available for the rear seat occupants, depending on trim level. A new control panel, the
Rear Seat Remote, will be available as an option at the
Start of Production (SOP) of the new Audi A8.

Two buttons are available for operation of the seat heating
in standard trim: Left Seat Heating Button E653 and Right
Seat Heating Button E654. These buttons are connected
discretely to Vehicle Electrical System Control Module 1
J519.

Note
Seat Heating Control Module J882 is not accessible via the VAS Scan Tool.

Rear Seat Remote
The Rear Seat Remote unit has:
›› Vertical Control Button (Down) in Driver Seat Switch Module E869.
›› Auxiliary Display Control Head 1 - E857.
The holder is a separate CAN control module integrated in the MIB CAN.
Both front displays have similar functions, layout and appearance. The Rear Seat Remote is also operated via a touchscreen.

665_026

24

Control panels to be introduced at a later date
Rear A/C Display Control Head E265 will be available for rear seat occupants as an option. It does not have a sensory
surface. This control panel can be used to set the seat heating in addition to temperature and blower speed

665_036

A control panel with a sensory surface will be optionally available as an additional control panel for the rear seat
occupants.
The following settings can be made:
››
››
››
››
››
››

Temperature.
Fan speed.
Air distribution.
Automatic climate control.
Climate control on / off.
Seat heater.

665_027

Setting the fan speed
The fan speed can be adjusted by “sliding” any of the four
front or two rear touch sliders.
The sliders have the following designations:
Left front area

Front A/C Display Control Head 1 E774

Center left front area

Front A/C Display Control Head 2 E775

Center right front area

Front A/C Display Control Head 3 E776

Right front area

Front A/C Display Control Head 4 E777

Center left rear area

Front A/C Display Control Head 5 E778

Center right rear area

Front A/C Display Control Head 6 E884

25

Seats and available functions
Massage function
Back massage
An enhanced back massage function is available in the new
Audi A8. Up to 16 bladders are integrated in the front seat
and up to 18 in the rear seat. In standard trim, the seats
are equipped with double lift bladders. The optional triple
lift bladders are designed to provide a higher intensity back
massage.
For a back massage, there is a choice of three intensity
levels and the following seven programs:
››
››
››
››
››
››
››

Shaft
Circular motion
Stretch
Relaxation
Shoulders
Activation
Vitalization

665_029

Foot massage

Massage
back area

Massage
shoulder area

26

Foot massage
Depending on equipment version, a foot massage is available for the first time.
To be able to activate the foot massage function, the front
passenger seat back must be moved from a reclining position to a folded forward position. The massage program
offers two options allowing the soles of the feet to be
massaged either by the linear application of pressure by
massaging the reflex zones.
For the foot massage there is a choice of:
›› Two programs (Wave, Stretch).
›› Three intensity levels.
›› Three foot sizes (S-M-L).

665_028

A178308

27

Surface heating
The armrests in the door trims as well as the center armrests in the front and rear are heated surfaces.

All heated surfaces are deactivated and regulated through
the seat heater.

The one-piece front center armrest in is not heated. Only
split front armrests are heated.

665_018

Depending on trim level, three surface heating variants
are available:
›› For the front seats only.
›› For the rear seats only.
›› Or for the front seats and rear seats.

28

All surface heating variants are coupled directly to the seat
heaters and cannot be operated independently of the seat
heaters.

The heating level for the center armrests in the front and
rear of the vehicle is determined by whichever seat heating
setting is higher in each row of seats.

The surface heating of the door armrests depends on what
heating output is selected for the seat in question.

If, for example, the seat heater of the left, rear seat is set to
level three and the seat heater of the right, rear seat is set to
level one, the common armrest is switched to level three.

Foot heater
Overview of foot heater control system

665_030

Depending on equipment, the foot heater in the footrest
can only be activated in the unfolded position and in the
reclined position of the front passenger seat.

It is operated through the Smart Remote Control unit and,
like the seat heater and the seat ventilation system, is
adjustable to three levels.

Optional seat heating and ventilation
The seat heater and the seat ventilation system have three levels, which can be set at the front and rear
control panels.

29

Workshop equipment
A/C service station
The introduction of the new R744 refrigerant in the Audi A8
also sees the introduction of a new A/C service station for
service.
The previous A/C service stations cannot be used to service
R744 refrigerant systems. Due to the new requirements for
R744 regarding pressure and integrity, it was necessary to
completely redesign the A/C service station.

The following tasks can be carried out using the new A/C
service station:
››
››
››
››
››
››

Hose emptying
Drainage
Evacuation
Filling
Pressure testing
Fresh oil and UV additive injection

The multifunction steering wheel can be used for operation
and menu navigation. There is an automatic mode and a
manual mode in which operations can be selected individually.

665_033

The automatic "A/C service" mode includes the following
­operations:
››
››
››
››

Self test
Drainage
Evacuation
Filling

665_034

Note
The refrigerant circuit cannot be flushed with the AC service station for R744.
This must be done with one of the previously used AC service stations and the appropriate refrigrant (e.g. R1234yf or R134a).

30

Service connections
The caps covering the service connections of R744 air
conditioning systems are snap fitting, and no longer
screwed on. The snap fitting provides added safety since,
unlike a threaded cap, refrigerant pressure cannot build up
under the caps. This prevents the cap from becoming
detached by itself due to high pressure, and reduces the
risk of an accident.

To avoid accidentally evacuating or refilling the A/C system
with the wrong refrigerant when carrying out service work,
the service connections and the service couplings are coded
mechanically. This means that the connections for R134a,
R1234yf and R744 differ in their geometry, such as diameter and connection length.

665_014

31

Appendix
eSelf-Study programs
For more information about the technology of the Audi A8,
please refer to the following eSelf-Study programs.

Self-Study Program 970133

The Audi 3.0l V6 TFSI
EA839 Engine
Audi Occupant Protection Systems

SSP 970133
Audi Occupant Protection Systems

The 2019 A8 Infotainment and Audi Connect
Systems

eSelf Study Program 920173

SSP 920173
The Audi 3.0l V6 TFSI
EA839 Engine

The 2019 Audi A8 Introduction
eSelf-Study Program 990493

eSelf Study Program 990293

SSP 990293
The 2019 Audi A8
Infotainment and Audi Connect Systems

The 2019 A8 Running Gear and Suspension
Systems
Self Study Program 960293

The 2019 Audi A8 Electrics and Electronics

SSP 960293
The 2019 A8 Running Gear
and Suspension Sytems

The 2019 A8 Driver Assistance Systems
Self Study Program 990393

SSP 990393
The 2019 A8 Driver Assistance Systems

32

SSP 990493
The 2019 Audi A8 Introduction

eSelf-Study Program 970293

SSP 970293
Audi A8
The 2019 Audi A8 Electrics and
Electronics

Knowledge assessment
An On-Line Knowledge Assessment (exam) is Available for this eSelf-Study Program.
The Knowledge Assessment is required for Certification credit.
You can find this Knowledge Assessment at: www.accessaudi.com

From the accessaudi.com Homepage:
›› Click on the “App Links”
›› Click on the “Academy site CRC”
Click on the Course Catalog Search and select “980193 - The 2019 Audi A8 Climate Control Systems”
Please submit any questions or inquiries via the Academy CRC Online Support Form
which is located under the “Support” tab or the “Contact Us” tab of the Academy CRC.

Thank you for reading this eSelf-Study Program and taking the assessment.

33

980193
All rights reserved.
Technical specifications subject to
change without notice.
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2200 Ferdinand Porsche Drive
Herndon, VA 20171