Audi e-tron GT (type F8)
Self-study programme SSP 684

For internal use only

Audi Service Training

Contents
Introduction
Introduction
Dimensions

4
5

Body
Introduction
Underbody structure
Body assembly

7
9
10

Power units
Electric drive motor for front axle
Electric drive motor for rear axle
Introduction
Construction of electric drive motors
Electric drive cooling system
Description of function
Electric drive control unit (power electronics)
Networking/sensors
Driving dynamics
Electronic engine sound

19
20
22
22
26
27
27
30
32
32

Power transmission
Overview
Selector mechanism
Single-speed transmission – 0MG
Two-speed transmission 0ME
Service

34
36
39
44
80

Running gear
Overview
Axles
Wheel alignment
Adaptive air suspension
Electronic damping control
Steering system
Brake system
ESC 9.2
Electromechanical parking brake (EPB)
Integration of hydraulic brake system in vehicle’s recuperation system
Wheels and tires, tire pressure monitoring

82
82
90
92
102
104
108
113
115
118
120

Electrics and electronics
12 Volt power supply
Networking
Control units
Terminal control
Exterior lighting

123
130
140
142
146

Convenience electronics
Control unit for head-up display J898
Convenience system central control unit J393
Front seats
Control unit in dash panel insert J285
Interior lighting
Central locking system with convenience key

High-voltage system
Safety regulations
Warning labels
Overview of high-voltage components
High-voltage battery AX2
Power contactor with boost function J1178
2

154
155
155
158
158
160

161
162
164
165
170

Voltage converter A48
Charging unit 1 for high-voltage battery AX4
Intermediate capacitors
Power contactors
Safety circuit
Charging

172
173
175
175
176
179

Air conditioning and thermal management
Climate control
Thermal management control unit J1024
Electrical air conditioner compressor V470
High-voltage heater (linear) Z189
Refrigerant circuit
Heat pump function
Heating circuit
Coolant circuit for high-voltage battery
Coolant circuit for electric powertrain
Cooling high-voltage battery 1 AX2 when charging

187
190
191
192
193
196
198
200
204
206

Safety and driver assist systems
Offer structure for driver assist systems
Special characteristics of the driver assist systems on the Audi e-tron GT
Fitting locations of sensors and control units
Maneuver assist
Park assist plus
Remote park assist plus
Passive safety
Airbag control unit J234
Sensors
Active safety

208
209
211
217
220
227
234
238
240
240

Infotainment and Audi connect
242
243
246

Introduction and overview of versions
Sound
Antennas

Servicing, inspection & roadside/breakdown assistance
250
250

Service interval display
Roadside/breakdown assistance
This self-study programme provides basic information on the design and function of new vehicle
models, new components or new technologies.
It is not a Workshop Manual. Any figures given here are for explanatory purposes only and refer
to the data valid at the time of writing.
Content is not updated.
It is essential that you refer to the latest technical literature when carrying out maintenance and
repair work.
In the glossary at the end of this self-study programme you will find an explanation of all terms
which are shown in italics and indicated by an arrow ↗.

Note

Reference

3

Introduction
Introduction

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The Audi e-tron GT is a fully electric, driver-oriented, high performance Gran Turismo. With its expressive design, it has the poten­
tial to become a real classic, marrying performance driving with day-to-day practicality.
Initially, a sporty RS model and an all-rounder suitable for long journeys are available. What they have in common is their ability to
reproduce the electrical motor performance for sporty acceleration at any time. The top model is the first fully electric RS with
440 kW and 830 Nm of system torque.
The e-tron GT puts Vorsprung durch Technik onto the road. 100 % electric quattro drive, torque vectoring and four-wheel steering
provide new types of dynamic driving and excellent grip for the best handling and safety. High-power charging with up 270 kW at
800 Volts enables short charging stops. Intelligent thermal management ensures permanently high charging performance during
the entire charging process.
The e-tron GT is first Audi BEV with flat-floor architecture. The result is a low centre of gravity for a sporty look and dynamic han­
dling. When designing the car, the designers put everything they learned in the wind tunnel into practice. The sophisticated active
aerodynamics with controllable air inlets on the front don’t just look effective: they are the basis for more range at higher speeds,
along with excellent aerodynamic acoustics for a comfortable drive.

Product highlights
Aerodynamics
The vehicle is equipped with aerodynamic features such as controllable cool air intakes, air curtains, aerodynamic wheels, full trim
on the underbody, targeted airflow around the brakes and tires along with a variable rear spoiler to control the air resistance and
downforce at the rear according to the situation. These help to achieve a good drag coefficient and play a major part in providing
good electrical range and driving performance.
Drive and high-voltage system
The permanently excited synchronous motors ensure powerful quattro drive, and the 800 Volt electrical system allows DC charging
with up to 270 kW so that the vehicle can be charged for approx. 100 km of range in about five minutes.
Running gear and power transmission
With the optional three-chamber air suspension, the two-speed rear transmission unit and torque vectoring on the rear axle, the etron GT is the arbiter in the conflict between comfortable and sporty driving.
4

Driver assist systems
Alongside the tour, city and parking assist packages familiar from previous models, the park assist plus and the remote park assist
plus are being offered for the first time.
Infotainment and Audi connect
With the e-tron route planner and the optional Bang & Olufsen 3D Sound System with 16 loudspeakers and 3D sound, the MIB 3
infotainment system provides top levels of acoustic comfort. And with the electronic engine sound for inside and outside, which
can be adjusted by the driver in Audi drive select, Audi is bringing another acoustic dimension to electric sound.

Dimensions

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Exterior dimensions, weights, other data

Length in mm

4989

Width (not incl. mirrors) in mm

1964

Width (incl. mirrors) in mm

2158

Height in mm

1413 (1396)[1]

Wheelbase in mm

2900

Front track in mm

1710 (1702)[2]

Rear track in mm

1694 (1667)[2]

Turning circle in m

11.6

Unladen weight (EU) in kg

2351 (2422)[2]

[1] Value in brackets is with air spring
[2] Value in brackets applies to RS model
5

Max. gross weight in kg

2840 (2860)[2]

Peak electric power output in kW

350 (440)[2]

Electric torque in Nm

630 (830)[2]

Drag coefficient

0.24

Load sill height in mm

697 (681)[1]

Front luggage compartment capacity in ltr.

81

Rear luggage compartment capacity in ltr.

405 (350)[3]

[2] Value in brackets applies to RS model
[1] Value in brackets is with air spring
[3] Value in brackets applies to equipment version with Bang & Olufsen Premium Sound System
6

Body
Introduction
The body of the Audi e-tron GT (type F8) is a modern composite construction which uses various materials. The quality of the mate­
rials selected not only reduces weight, but also provides the basis for meeting the stringent vehicle safety standards. The majority
of components used in the body structure are made of cold-formed or hot-formed steel panels, aluminum extrusions or aluminum
castings. Aluminum panels are used for the outer skin.

Outer skin
›
›
›
›
›

Front Fenders
Doors
Hood
Rear lid
Side panels

These components are made of aluminum on the Audi e-tron GT (type F8).

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7

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Key:

Cold-formed steel
Hot-formed steel
Die-cast aluminum
extrusion aluminum
panel

Joining techniques
The following joining techniques are used in the manufacture of the multi-material body:

Resistance spot welding for steel

8

MIG/MAG welding

Laser welding for aluminum

The following joining techniques are used in the manufacture of the multi-material body:

Friction element welding

Semi-tubular punch riveting

Bonding

Flow-drill screws

Seaming

Clinching

Underbody structure
The high-voltage battery has been fully integrated into the supporting body structure in the vehicle floor on the Audi e-tron GT
(type F8) using a battery frame. The battery frame increases the rigidity of the body, particularly in areas that are especially
relevant for safety (such as the high-voltage battery).

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High-voltage battery
The high-voltage battery is secured to the underbody of the Audi e-tron GT with a total of 28 bolts.

9

Battery frame
The battery frame made of aluminum extrusions not only provides the highest possible protection in the event of an accident but
also increases the body’s torsional rigidity. If the battery frame is damaged, it must be replaced.

Underbody guard
The underbody guard is made of aluminum and is bolted and bonded onto the battery frame. It protects the high-voltage battery
against damage from below (e.g. from stones) and can be replaced separately if damaged. If the battery frame (aluminum extru­
sion) is damaged, it must be replaced.

Sill panel reinforcement
The sill panel reinforcement increases the rigidity of the body in a side impact, particularly in areas that are especially relevant for
safety (such as the high-voltage battery).

Body assembly
Aerodynamics
Particularly on electric vehicles, the aerodynamics are a key factor for the range. Especially at high speeds, small details have a pos­
itive effect on air resistance and therefore also on the performance and efficiency of the vehicle.
Air curtains
Controlled airflow at the front wheels plays a major role in the aerodynamic concept. The side air inlets at the front of the vehicle
(the air curtains) guide the air into the wheel housings via a channel so that the wheels and the side of the vehicle have optimal
airflow. Narrow horizontal ribs in the air ducts guide the air so that disruptive swirls in the wheel housings are encapsulated. This
results in the air travelling more “cleanly” along the side of the vehicle with reduced flow losses. The design of the aerodynamic
wheels along with the profile and the embossing of the tire sidewalls are also optimised in this regard.

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10

Underbody

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The complex aerodynamic concept continues under the vehicle floor, where underbody trim with spoiler elements guides the air
cleanly around the vehicle. Trim is fitted to the entirety of the underbody (including the aluminum cover plate for the high-voltage
battery). The screw connections take the form of bowl-like indentations, similar to the dimples on a golf ball. They allow the air to
flow even more easily than a fully flat surface would.

Rear spoiler
The Audi e-tron GT (type F8) has a retractable spoiler in the rear lid. Depending on the speed, the spoiler blade is automatically
moved into two positions. A button on the MMI touch display can also be used to move the spoiler to its upper end position man­
ually. If the button is pressed for longer, the spoiler is moved back into the position corresponding to the current speed. If the
spoiler is manually moved to its end position, it stays there if the vehicle is stopped or parked. After terminal 15 is switched on, the
spoiler retracts automatically once the vehicle is travelling over 20 km/h.

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0

Spoiler retracted

1

Spoiler in ECO position

11

2

Spoiler in performance position

3

End position (manual)

It is actuated by rear spoiler adjustment control unit J223. The position of the spoiler is monitored by two Hall sensors in the spoil­
er adjustment system. One of the sensors measures the end position of the extended rear spoiler, while the other counts the num­
ber of drive motor revolutions while the spoiler is being retracted.
Adjusters allow the height of the spoiler blade to be aligned vertically (z axis) in relation to the rear lid and side panel. Elongated
holes are used for alignment in the longitudinal and transverse directions (x and y axes).
Drain hoses on the right and left ensure that rainwater can be channelled out of the drive unit for rear spoiler adjustment. Since
moulded hoses are used, the markings on both sides must align with each other when the hoses are fitted onto the mountings.

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12

Glass trim

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The rear window is optically lengthened downwards with a piece of glass trim made of tinted safety glass fitted above the spoiler.
Three clips ensure that the trim is positioned correctly. It is bonded to the rear lid with window adhesive.

13

Rear lid

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The electrically operated rear lid in the Audi e-tron GT (type F8) is operated via a spindle drive on the rear lid hinge (left-side).

Note
When motor for rear lid V444 is removed, the electrical connector must be unplugged first. The clip on the ball mount­
ing must then be pressed together with 90° angled long-nose pliers. Under no circumstances should the clip be prised
off with a screwdriver or a similar tool.

Roof
Two roof versions are available for the Audi e-tron GT (type F8); the CFRP roof or the panoramic sunroof.

14

CFRP roof

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The outer section of the roof (made of clear-coated CFRP) is bonded to a frame made of extra-high-strength steel. Acoustic fleece
material at the front and rear provides the necessary noise insulation. The CFRP outer skin only weighs approx. 4.2 kg; the entire
roof (including frame, adhesive, seals and acoustic fleece) weighs approx. 10.2 kg. The uppermost, visible carbon fibre weaving has
a 0/90° orientation/a twill of 45°. This means that the parallel lines of the twill weave are diagonal to the vehicle’s longitudinal
axis.
No roof carrier system is available in conjunction with the CFRP roof.

15

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Panoramic sunroof

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16

The panoramic sunroof covers the entire roof surface and is permanently bonded to the vehicle body. It cannot be opened. The
laminated safety glass has an acoustic foil covering and an additional foil covering which almost entirely reflects infrared rays. An
additional low emissivity coating provides additional heat and sun protection. Retainers for a roof carrier are integrated under the
side roof trim strips. The entire panoramic sunroof (including frame, adhesive, seals and bracket) weighs approx. 22.5 kg.

Vehicle interior

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A major emphasis was placed on sustainability when selecting materials for the vehicle interior.
For example, the floor mat and the carpet are made of Econyl®.
Nylon waste which would otherwise pollute our planet (such as fishing nets, fabric remnants, carpets and industry waste are collec­
ted, sorted and cleaned to win back the nylon contained therein. In an extensive cleaning and regeneration process, nylon fibres are
created from the regenerated nylon waste and subsequently woven into, among other things, carpets for the Audi e-tron GT (type
F8).
The foam of the seat padding is made of 85 % recycled PET bottles.
The Cascade seat cover is made of 35 % recycled PET bottles and 15 % regionally recycled textile fibres. This seat cover is fitted on
the Audi e-tron GT (type F8) with leather-free interior (PR number: 7HF). In this case, the interior elements are partly covered with
leatherette and partly with the high-end microfibre Dinamica. This fibre is also primarily made of recycled polyester fibres and is
100% recyclable. The Alcantara steering wheel is fitted on this version.