2021-2026 Audi RS E Tron Gt 4 Door Electrics and electronics -> Networking User Manual
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Electrics and electronics -> Networking for Your Audi RS E Tron Gt 4 Door First Generation (2021-2026)

684_267  
Networking  
Data transmission, fitting locations and topology of control units  
Bus systems used on the Audi e-tron GT  
Bus systems  
Wire colour  
Method  
Data transfer rate  
500 kbit/s  
500 kbit/s  
500 kbit/s  
500 kbit/s  
500 kbit/s  
500 kbit/s  
500 kbit/s  
500 kbit/s  
500 kbit/s  
10 Mbit/s  
Convenience CAN  
Convenience CAN 2  
Extended CAN  
Hybrid CAN  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Electrical bus system  
Fibre optic bus system  
Electrical single wire bus system  
Electrical bus system  
Dash panel insert CAN  
Infotainment CAN  
Connect CAN  
Diagnostics CAN  
Information electronics 1 CAN  
FlexRay  
MOST bus  
150 Mbit/s  
20 kbit/s  
LIN bus  
Sub-bus systems  
500 kbit/s  
1 Mbit/s  
Ethernet  
Electrical bus system  
100 Mbit/s  
Fitting locations and topology of control units  
Notes on illustrations  
The following illustrations are sorted according to the different bus systems on the Audi e-tron GT (type F8) and provide informa-  
tion on:  
›
›
›
›
›
›
The location of the control unit in the vehicle  
The bus system via which the control unit participates in communication  
The control unit code  
The diagnostic address  
The power supply  
The bus termination resistor  
The following illustrations show all control units which may be connected to the various bus systems.  
Some control units are the result of optional or country-specific equipment.  
130  
The illustrations are intended as an overview of the fitting locations and the various data transmission paths between the control  
units. They do not show the exact fitting locations and do not provide any information about the routing of wiring or the nodes in  
the wiring harness. They are therefore not a substitute for the relevant current flow diagrams or Workshop Manuals. For illustra-  
tion purposes, the LIN slaves are allocated to the control unit and do not reflect the fitting location of the components. For the LIN  
slaves shown, several components are sometimes grouped together to ensure a reasonable degree of clarity in the illustrations. For  
example, in the area of the air conditioner control motors or the interior lighting modules, only one LIN participant is shown when  
in reality there is a chain of LIN slaves.  
A left-hand drive vehicle is shown in the illustration.  
684_122_4  
Convenience CAN  
684_122  
Key:  
J136  
Control unit for seat and steering column adjustment with memory function (under driver's seat)  
N475  
N476  
Valve block 1 in driver seat  
Valve block 2 in driver seat  
J223  
J386  
Rear spoiler adjustment control unit (in rear lid)  
Driver door control unit (in driver's door)  
J926  
Front passenger door control unit (in front passenger's door)  
J927 Rear passenger side door control unit  
Convenience system central control unit (on right in luggage compartment)  
Rear driver side door control unit  
J387  
J393  
G578  
H12  
Anti-theft alarm sensor  
Alarm horn  
J938  
MX3  
Rear lid power opening control unit  
Left tail light cluster  
131  
MX4  
Right tail light cluster  
Centre tail light cluster  
MX13  
J521  
J533  
J605  
Control unit for front passenger seat adjustment with memory function (under front passenger's seat)  
N477  
N478  
Valve block 1 in front passenger seat  
Valve block 2 in front passenger seat  
Data bus diagnostic interface (on centre tunnel)  
A
Battery  
J453  
Multifunction steering wheel control unit  
Rear lid control unit (in side panel on rear left)  
J519  
Onboard supply control unit  
The onboard supply control unit communicates via convenience CAN bus 2 (refer to illustration of con-  
venience CAN bus 2) but contains a low-ohm termination resistor for the convenience CAN bus and is  
therefore also shown in this illustration.  
Terminal 30 power supply  
Terminal 15 power supply  
120 ohms  
9200 ohms  
Convenience CAN 2  
684_126  
Key:  
J519  
Onboard supply control unit (on A-pillar, left-side; fitted in area of A-pillar, right-side, on right-hand drive vehi-  
cles)  
E1  
Light switch  
EX5  
Interior mirror  
G355  
G397  
J530  
J866  
MX1  
MX2  
V512  
V514  
V516  
V518  
Humidity sender  
Rain and light sensor  
Garage door operation control unit  
Control unit for electrically adjustable steering column  
Front left headlight  
Front right headlight  
Front left seat backrest fan 1  
Front left seat cushion fan 1  
Front right seat backrest fan 1  
Front right seat cushion fan 1  
132  
VX58  
WX3  
1-15  
Windscreen wiper  
Front roof module  
Interior lighting modules  
Interior lighting modules  
16-30  
J533  
J979  
Data bus diagnostic interface (on centre tunnel)  
Heater and air conditioning system control unit (fitted on left side of air conditioning unit)  
E87  
Operating and display unit for front air conditioning system  
Operating and display unit for rear air conditioning system  
Sunlight penetration photosensor  
E265  
G107  
G897  
G930  
G935  
J126  
1-16  
2-5  
Interior air quality sensor  
Air conditioner sensor for fine particle concentration  
External air quality and air humidity sensor  
Fresh air blower control unit  
Flap control motors on air conditioning unit (front)  
Flap control motors on air conditioning unit (rear)  
Terminal 30 power supply  
Terminal 15 power supply  
Power supply via J519  
Power supply via J979  
120 ohms  
1800 ohms  
9200 ohms  
Extended CAN  
684_127  
Key:  
Tire Pressure Monitoring System control unit (on rear subframe)  
Data bus diagnostic interface (on centre tunnel)  
J502  
J533  
J769  
J770  
J772  
J853  
Lane change assist control unit (under rear bumper cover, right-side)  
Lane change assist control unit 2 (under rear bumper cover, left-side)  
Reversing camera system control unit (in rear lid)  
Control unit for night vision system (in front luggage compartment, on front cross member, right-side)  
133  
J1167  
J1177  
Engine sound generator control unit 2 (in rear luggage compartment, left-side)  
Engine sound generator control unit 3 (in rear luggage compartment, right-side)  
Terminal 30 power supply  
Terminal 15 power supply  
66 ohms  
9200 ohms  
Note  
The next two illustrations are not realistic depictions of how the FlexRay control units are networked. Precisely how the  
individual branches of the FlexRay control units are connected together is shown subsequently in a separate illustra-  
tion.  
Control units which are connected both to FlexRay channel A and FlexRay channel B appear in both illustrations.  
FlexRay channel A  
684_128  
Key:  
J104  
J234  
J500  
J527  
J533  
J539  
J623  
ABS control unit (in front luggage compartment, centre left)  
Airbag control unit (on centre tunnel)  
Power steering control unit (in underbody on steering rack)  
Steering column electronics control unit (on steering column)  
Data bus diagnostic interface (on centre tunnel)  
Brake servo control unit (in front compartment, left-side)  
Motor control unit (in luggage compartment, rear left)  
VX65  
V552  
Gear actuator  
Gearbox auxiliary hydraulic pump  
J647  
J775  
Axle differential lock control unit (in rear luggage compartment, right-side)  
Running gear control unit (in rear luggage compartment, left-side)  
V66  
Adaptive suspension compressor motor  
J1019  
J1121  
Rear wheel steering control unit (on underbody, left-side)  
Driver assist systems control unit (on centre tunnel in front passenger's footwell, i.e. right footwell on left-hand  
drive vehicles and left footwell on right-hand drive vehicles)  
1-12  
Ultrasonic sensors  
134  
J1234  
J1235  
Electric drive control unit for front axle (on electric motor on front axle)  
Electric drive control unit for rear axle (on electric motor on rear axle)  
Terminal 30 power supply  
Terminal 15 power supply  
Power supply via J1121  
66 ohms  
120 ohms  
9200 ohms  
FlexRay - channel B  
684_129  
Key:  
J104  
J234  
ABS control unit (in front luggage compartment, centre left)  
Airbag control unit (on centre tunnel)  
J706  
J854  
J855  
Seat occupied recognition control unit  
Control unit for front left belt tensioner  
Control unit for front right belt tensioner  
J428  
Adaptive cruise control unit (on front bumper cross member)  
J533  
Data bus diagnostic interface (on centre tunnel)  
J769  
Lane change assist control unit (under rear bumper cover, right-side)  
Lane change assist control unit 2 (under rear bumper cover, left-side)  
Front left radar sensor control unit for object detection (under front bumper cover, left-side)  
Front right radar sensor control unit for object detection (under front bumper cover, right-side)  
J770  
J1088  
J1089  
J1121  
Driver assist systems control unit (on centre tunnel in front passenger's footwell, i.e. right footwell on left-hand  
drive vehicles and left footwell on right-hand drive vehicles)  
Terminal 30 power supply  
Terminal 15 power supply  
66 ohms  
9200 ohms  
135  
Topology of FlexRay control units  
684_130  
Key:  
J104  
J234  
J428  
J500  
J527  
J533  
J539  
J623  
J647  
J769  
J770  
J775  
J1019  
J1088  
J1089  
J1121  
J1234  
J1235  
ABS control unit  
Airbag control unit  
Adaptive cruise control unit  
Power steering control unit  
Steering column electronics control unit  
Data bus diagnostic interface  
Brake servo control unit  
Motor control unit  
Axle differential lock control unit  
Lane change assist control unit  
Lane change assist control unit 2  
Running gear control unit  
Rear wheel steering control unit  
Front left radar sensor control unit for object detection  
Front right radar sensor control unit for object detection  
Driver assist systems control unit  
Electric drive control unit for front axle  
Electric drive control unit for rear axle  
136  
Hybrid CAN  
684_131  
Key:  
A48  
AX4  
Voltage converter for 800 V, 400 V, 48 V, 12 V (on electric motor on front axle)  
Charging unit 1 for high-voltage battery (on electric motor on front axle)  
EX32  
EX40  
Module for battery charge selector buttons  
Module 2 for battery charge selector buttons  
J533  
J840  
J1024  
Data bus diagnostic interface (on centre tunnel)  
Battery regulation control unit (on electric motor on front axle)  
Thermal management control unit (on A-pillar, left-side; fitted in area of A-pillar, right-side, on right-hand drive  
vehicles)  
G395  
G826  
G827  
J671  
Refrigerant pressure and temperature sender  
Refrigerant pressure and temperature sender 2  
Refrigerant pressure and temperature sender 3  
Radiator fan control unit 2  
N632  
N633  
N637  
N638  
N640  
N641  
N643  
V470  
V544  
V550  
V650  
V651  
V653  
V656  
VX57  
Z189  
Coolant changeover valve 1  
Coolant changeover valve 2  
Refrigerant expansion valve 2  
Refrigerant expansion valve 3  
Refrigerant shut-off valve 2  
Refrigerant shut-off valve 3  
Refrigerant shut-off valve 5  
Electrical air conditioner compressor  
Radiator blind control motor  
Radiator blind control motor 2  
Changeover and mixing valve for thermal management  
Changeover and mixing valve 2 for thermal management  
Changeover and mixing valve 4 for thermal management  
Changeover and mixing valve 7 for thermal management  
Radiator fan  
High-voltage heater (PTC)  
J1178  
J1234  
J1235  
Power contactor with boost function (on electric motor on front axle)  
Electric drive control unit for front axle (on electric motor on front axle)  
Electric drive control unit for rear axle (on electric motor on rear axle)  
137  
Terminal 30 power supply  
Power supply via J1024  
120 ohms  
9200 ohms  
Dash panel insert CAN  
684_132  
Key:  
J285  
J533  
J587  
J898  
Control unit in dash panel insert (in dash panel on driver's side)  
Data bus diagnostic interface (on centre tunnel)  
Selector lever sensors control unit (in centre console)  
Control unit for head-up display (in dash panel on driver's side)  
Terminal 30 power supply  
120 ohms  
9200 ohms  
138  
Infotainment CAN/connect CAN/Information electronics 1 CAN  
684_133  
Key:  
J533  
J794  
Data bus diagnostic interface (on centre tunnel)  
Control unit 1 for information electronics (in dash panel near centre console)  
E67  
Driver side volume regulator  
MMI display  
J685  
J1146  
Charging unit 1 for mobile devices  
J949  
Emergency call module control unit and communication unit (on centre tunnel)  
Control unit for radio-controlled parking  
J1182  
Terminal 30 power supply  
66 ohms  
120 ohms  
9200 ohms  
139  

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