NHTSA ID Number: 10118386
Manufacturer Communication Number: SSP 970173
TSB/Document Date: 2017-10-04
Summary
This document contains the eSelf study program regarding the Electrics, Electronics, and infotainment system of the vehicle.
Convenience CAN
Electrical two-core bus system
500 kbit/s
not single wire capable
Chassis CAN bus
Electrical two-core bus system
500 kbit/s
not single wire capable
Extended CAN
Electrical two-core bus system
500 kbit/s
not single wire capable
Display and Operation CAN
Electrical two-core bus system
500 kbit/s
not single wire capable
Modular Infotainment
Platform (MIB) CAN
Electrical two-core bus system
500 kbit/s
not single wire capable
Diagnostics CAN
Electrical two-core bus system
500 kbit/s
not single wire capable
FlexRay
Electrical two-core bus system
10 Mbit/s
not single wire capable
MOST bus (150)
Fiber-optic bus system
150 Mbit/s
Ring structure:
an open circuit will result in
total system failure
LIN bus
Electrical single-core bus system
20 kbit/s
Capable of single-core operation
Sub-bus system
Electrical two-core bus system
500 kbit/s
not single wire capable
LVDS
Electrical two-core bus system
approx. 200 Mbit/s
not single wire capable
MOST 150
LVDS
The MOST 150 bus was first used in the 2015 Audi A3 and
subsequently in the 2016 Audi
TT and 2017 Audi Q7
models. In the Audi R8 up to three control modules are
integrated in the MOST ring in the following order:
LVDS (Low Voltage Differential Signal) is used for image
transfer between Information Electronics Control Module 1
J794 and Instrument Cluster Control Module J285.
›› Information Electronics Control Module 1 J794.
›› Instrument Cluster Control Module J285.
›› Digital Sound System Control Module.
J794 acts both as the diagnosis manager and as the system
manager for the MOST bus. As always with the MOST bus in
Audi vehicles, the control modules are interconnected by an
electronic ring break diagnostics wire. This line is only
required for electronic ring break diagnostics in the event
of a fault.
Unlike with the FlexRay, the sheathing of the LVDS wires
not only protects against mechanical stresses and moisture, but also shields against electromagnetic interference.
In the event of a fault, LVDS lines must always be completely replaced.
FlexRay
ABS Control Module J104 and Sensor Electronics Control
Module J849 are the only two modules transferring data
over the FlexRay data bus.
The FlexRay wires are twisted in the same way as the CAN
wires. They are additionally sheathed. However, the sheathing does not provide shielding against electromagnetic
interference; it only minimizes effects of external influences, such as dampness and temperature on the core’s
characteristic impedance. In principle, sections of FlexRay
lines can be replaced. Always follow the instructions in
ElsaPro regarding replacement of FlexRay wires.
Reference
For further information about the FlexRay bus, refer to eSelf Study Program 970103, The 2011 Audi A8 Convenience
Electronics and Networking Systems. For information about the LVDS and MOST 150 buses, refer to eSelf Study Program
970153, The 2016 Audi TT Vehicle Electrics, Electronics and Infotainment Systems, and eSelf-Study Program 970163, The
2017 Audi Q7 Onboard Power Supply and Networking System.
7
Special features of the control modules used
The control modules used in the R8 are adopted from
various other Audi models. Because of this, there are differences in enabling, encoding and the Test Plans that can be
performed during control module replacement.
Some control modules use an old procedure that is based
on a comparison of target and actual values.
Old procedure modules
Other control modules use a new procedure. The new
procedure adopts, where possible, custom adjustments and
activations in addition to the coding of the control module.
The following table identifies the old and new modules of
the 2017 R8.
New procedure modules
Control module designation
Address
Word
01
Engine Control Module 2 J624
11
Transmission Control Module J217
02
All Wheel Drive Control Module J492
22
Driver Door Control Module J386
42
Front Passenger Door Control Module J387
52
ABS Control Module J104
03
Power Steering Control Module J500
44
Cornering Lamp And Headlamp Range Control
Module J745
Control module designation
Address
Word
Automatic High Beam Assist Control Module
J844
20
Electronic Damping Control Module J250
14
Airbag Control Module J234
15
Seat Belt Microphone Control Module J886
A6
Instrument Cluster Control Module J285
17
Digital Sound System Control Module J525
47
Front A/C Display Control Head E87
08
Rearview Camera System Control Module
J772
6C
55
65
Information Electronics Control Module 1
J794
5F
Tire Pressure Monitoring Control Module J502
Steering Column Electronics Control Module
J527
16
Selector Lever Sensor System Control Module
J587
81
Data Bus On Board Diagnostic Interface J533
19
Active Steering Control Module J792
18
Sensor Electronics Control Module J849
3B
Electromechanical Parking Brake Control
Module J540
53
Transmission Control Module 2 J1006
C2
Memory Seat/Steering Column Adjustment
Control Module J136
06
Front Passenger Memory Seat Control Module
J521
36
Comfort System Central Control Module J393
46
Vehicle Electrical System Control Module
J519
09
8
Control module profiles
Gateway
Designation
Data Bus On Board Diagnostic Interface J533
Equipment
Always installed
Installation location
On the bulkhead at the top left
Task
››
››
››
››
Address Word
19
Data bus communication
›› User of Convenience CAN, Powertrain CAN, Chassis CAN, Display and Operation CAN,
Extended CAN, Diagnostic CAN and FlexRay buses.
›› LIN master of Battery Monitoring Control Module J367 and Alternator C
Special features
›› Not a participant of the Modular Infotainment Platform (MIB) CAN
›› Not a participant of the MOST bus
Network system gateway
Controller for FlexRay bus
Diagnostic master
Energy management control
Data Bus On Board Diagnostic Interface
J533
641_129
Connection
J533 is the controller for the FlexRay bus. All FlexRay
control modules are connected to J533 within various
branches. In this configuration J533 is referred to as the
"active hub" or "active node". If only one control module is
connected to a branch, this is referred to as a "point to
point" connection.
J104
47 Ω
47 Ω
Only two FlexRay users are connected to J533 in the
Audi R8.
››
››
ABS Control Module J104 is connected to branch 1.
Sensor Electronics Control Module J849 connected to
Branch 4.
This illustration differentiates between the bus positive
cable (pink) and the bus negative cable (green) regarding
the configuration of the control modules and thus reflects
the actual situation.
Two resistors each having a resistance of 47 Ω (94 Ω in
total) are connected to the end of each branch in the
control module. After disconnecting the control module
connector, the resistance value of 94 Ω can be measured by
connecting a multimeter between the connecting pins of
the bus positive and the bus negative at the relevant
control module.
9
Branch 1
47 Ω
47 Ω
47 Ω
47 Ω
J533
Branch 4
47 Ω
47 Ω
J849
641_130
Onboard power supply
Designation
Vehicle Electrical System Control Module J519 /
also referred to as BCM1 (Body Control Module 1)
Equipment
Always installed
Installation location
In the footwell on the right above the fuse box
Task
Exterior lights master and activation of the front lights
Limp-home turn signal master in case of failure of J393
Interior lighting master
A/C functions
›› Activation of front seat heating
›› Activation of A/C Compressor Regulator Valve N280 and A/C Clutch N25
Integration functions
›› Parking
›› Park assist
›› Activation of front and rear acoustic signal generators
Other functions
›› Reading input from the following senders/sensors/switches:
›› Ambient temperature
›› New engine coolant, windshield washer fluid, brake fluid
›› Brake pad wear
›› Hood contact
›› Temperature sensor for seats
›› Start-stop button, rear spoiler, park assist, ESP, hazard warning flashers
›› Activating the following actuators/control elements:
›› Signal horn
›› Windshield washer pump
›› Heating the windshield washer jets
›› Seat heater, front
›› Engine bay lights
›› Interior lights, glove box light
Address Word
09
Data bus communication
›› Convenience CAN user
›› J519 is the LIN master for:
›› LIN 1: Light Switch E1, Rain/Light Recognition Sensor G397, Humidity Sensor G355 and
Wiper Motor Control Module J400
›› LIN 2: High Pressure Sensor G65, Humidity Sensor In Fresh Air Intake Duct G657, Air
Quality Sensor G238, and Garage Door Opener Control Module J530
›› LIN 3: Left and Right Auxiliary High Beam Bulbs M67 and M68
Special feature
Fault finding notes:
Regarding the LIN slave configuration, J519 has a duplicated pin. For example, LIN 1 is distributed to 2 pins (A18, C2) which are, however, connected internally within the control
module. This means that the control modules connected to pin C2 are also affected in the
event of a short circuit to positive or negative at pin A18.
Vehicle Electrical System Control Module
J519
641_131
10
Comfort/convenience system
Designation
Comfort System Central Control Module J393 /
also referred to as BCM2 (Body Control Module 2)
Equipment
Always installed
Installation location
Below the parcel shelf on the left
Task
Central locking system master
Turn signal master
Integration functions
›› Terminal management system
›› Entry and start authorization
›› Immobilizer (master)
›› Anti-theft alarm system
Other functions
›› Reading input from the following senders/sensors/switches:
›› Brake light switch
›› Ignition starter button
›› P signal
›› Central locking antenna
›› Capacitive sensors of door handles
›› Entry and start authorization antennas
›› Activating the following actuators/control elements:
›› Rear lights
›› Signal for dynamic turn signal operation
›› Rear hatch motor
›› Luggage compartment release
›› Fuel tank flap lock
›› Relay for external sockets
›› Terminal 15 relay
›› Luggage compartment lights
›› Rear lighting
Address Word
46
Data bus communication
›› Convenience CAN participant
›› J393 is the LIN master for:
›› LIN 1: Garage Door Opener Control Head E284, Anti-Theft Alarm System Sensor G578
and Rear Spoiler Control Module J223
›› LIN 2: Alarm Horn H12
›› LIN 3: Electronic Steering Column Lock Control Module J764 and Anti-Theft Immobilizer
Reader Coil D2
Special features
›› J393 is the immobilizer system master
›› The central locking antenna is integrated with the control module printed circuit board
Comfort System Central Control Module
J393
641_132
11
Driver control modules
Designation
Driver Door Control Module J386
Equipment
Always installed
Installation location
In driver's door
Task
Controlling the electrical and electronic components in and on the driver's door
›› Reading input from the following senders/sensors/switches:
›› Switches/buttons on the door panel, for example: window lifters, rear hatch release,
electric door mirrors, central locking
›› Activating the following actuators/control elements:
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TSB/Document ID: SSP 970173
Replacement Service Bulletin Number:
MFR Communication Date: 2016-02-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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