NHTSA ID Number: 10118334
Manufacturer Communication Number: SSP 970563 A
TSB/Document Date: 2017-10-04
Summary
This Self-Study Program helps answer where the fuse and relay panels are located in the Audi
A4, what locations are electrical components installed on the car, which bus systems are used in the car, what the tasks are for the control modules, what are the versions of the exterior lighting and how the individual light functions are implemented in the vehicle.
Engine Control Module
Left Rear Information Display Control Head Control Module
Right Rear Information Display Control Head Control Module
Front Information Display Control Head
Electronic Steering Column Lock Control Module
Lane Change Assistance Control Module
Lane Change Assistance Control Module 2
Rearview Camera System Control Module
Drivetrain Control Module
J792 Active Steering Control Module
J794 Information Electronics Control Module 1
J844 Automatic High Beam Assist Control Module
J850 Distance Regulation Control Module 2
J898 Windshield Projection Head Up Display Control Module
J926 Driver Side Rear Door Control Module
J927 Passenger Side Rear Door Control Module
J928 Peripheral Camera Control Module
J1018 Left Light Control Module
J1023 Right Light Control Module
R242 Driver Assistance Systems Front Camera
9
Topology
Flap Control
Motors
1 – 15
Front A/C Display Control Head
E87
Driver Side Rear Door
Control Module
J926
Driver Door Control
Module
J386
Fresh Air Blower
Control Module
J126
Passenger Side
Rear Door Control
Module
J927
Front Passenger
Door Control Module
J387
High Pressure
Sensor
G65
Memory Seat/
Steering Column
Adjustment Control
Module
J136
Rear A/C Display Control Head
E265
Humidity Sensor In
Fresh Air Intake
Duct
G657
Air Quality Sensor
G238
Data Link Connector
Electronic Steering
Column Lock
Control Module
J764
Data Bus On Board Diagnostic Interface
J533
Power Sunroof
Control Module
J245
Left Front Seat
Backrest Fan 1
V512
Garage Door
Opener Control
Head
E284
Light switch
E1
Left Front Seat
Cushion Fan 1
V514
Garage Door
Opener Control
Module
J530
Wiper Motor
Control Module
J400
Right Front Seat
Backrest Fan 1
V516
Automatic
Dimming Interior
Rearview Mirror
Y7
Rain/Light
Recognition Sensor
G397
Right Front Seat
Cushion Fan 1
V518
Roof Electronics
Control Module
J528
Humidity Sensor
G355
Vehicle Electrical System Control Module
J519
Anti-Theft Alarm
System Sensor
G578
Interior light
module
Comfort System Central Control Module
J393
Key:
Convenience CAN
10
Diagnostics CAN
Hybrid CAN
FlexRay
Extended CAN
Modular Infotainment Platform (MIB) CAN
Infotainment CAN
LIN bus
Interior light
module
Left Rear
Information Display
Control Head
Control Module
J648
Multifunction
Steering Wheel
Control Module
J453
Driver Volume
Control
E67
Right Rear
Information Display
Control Head
Control Module
J649
Multimedia Button
Module
E817
Multimedia System
Control Head
E380
Battery Monitoring
Control Module
J367
Front Information
Display Control
Head
J685
Selector Lever
Sensor System
Control Module
J587
Digital Sound
System Control
Module
J525
Information
Electronics Control
Module 1
J794
Instrument Cluster
Control Module
J285
Windshield
Projection Head Up
Display Control
Module
J898
Peripheral Camera
Control Module
J928
or
Left Light Control
Module
J1018
Driver Assistance
Systems Front
Camera
R242
Engine Control
Module
J623
Right Light Control
Module
J1023
ABS Control
Module
J104
Radiator Shutter
Motor
V544
Left LED Headlamp
Power Output
Module 1
A31
Power Steering
Control Module
J500
Radiator Shutter
Adjustment Motor 2
V550
Right LED Headlamp
Power Output
Module 1
A27
Drivetrain Control
Module
J775
Active Steering
Control Module
J792
Left Front Seat Belt
Tensioner Control
Module
J854
Lane Change
Assistance Control
Module
J769
Steering Column
Electronics Control
Module
J527
Airbag Control
Module
J234
Right Front Seat
Belt Tensioner
Control Module
J855
Lane Change
Assistance Control
Module 2
J770
Distance
Regulation Control
Module
J428
Distance
Regulation Control
Module 2
J850
Passenger Occupant
Detection System
Control Module
J706
All Wheel Drive
Control Module
J492
Transmission
Control Module
J217
Transmission
Electric Pump 2
V553
Control Unit 1 for
Driving and
Convenience Functions
E791
Rearview Camera
System Control
Module
J772
Automatic High
Beam Assist Control
Module
J844
644_114_rev
Sub-bus systems
"OR" configuration
MOST bus
Ethernet port for diagnose interface VAS 6154
LVDS
FBAS
11
Bus systems used on the Audi A4
Bus system
Cable
color
Configuration
Max. data
transfer rate
Property
Hybrid CAN
Electrical two-wire bus system
500 kbit/s
not single wire capable
Convenience CAN
Electrical two-wire bus system
500 kbit/s
not single wire capable
Extended CAN
Electrical two-wire bus system
500 kbit/s
not single wire capable
Infotainment CAN
Electrical two-wire bus system
500 kbit/s
not single wire capable
Modular Infotainment
Platform (MIB) CAN
Electrical two-wire bus system
500 kbit/s
not single wire capable
Diagnostics CAN
Electrical two-wire bus system
500 kbit/s
not single wire capable
FlexRay
Electrical two-wire bus system
10 Mbit/s
not single wire capable
MOST bus
Fiber-optic bus system
150 Mbit/s
Ring structure:
an open circuit will
result in total system
failure
LIN bus
Electrical single-wire bus system
20 kbit/s
single wire capable
Sub-bus system
Electrical two-wire bus system
500 kbit/s
not single wire capable
LVDS
Electrical two-wire bus system
approx. 200 Mbit/s
not single wire capable
FBAS
Electrical single-wire bus system
approx. 80 Mbit/s
single wire capable
The network diagram on page 10 provides a schematic
overview of the communication paths between the control
modules in the Audi A4. The bus systems used in the
Audi A4 are identical to those of the Audi Q7.
If we compare the 2017 Audi A4 with the predecessor
model), new features in the area of data transmission are
the FlexRay, MOST150 and LVDS buses.
In spite of the many similarities with the 2017 Audi Q7,
there are a few differences that are not exclusively equipment-specific. For this reason, the topologies in the areas
of infotainment and FlexRay are described below.
Infotainment topology
In the Audi A4 three control modules are integrated in the
MOST ring in the following order:
• Information Electronics Control Module 1 J794.
• Instrument Cluster Control Module J285.
• Digital Sound System Control Module J525.
When compared to the 2017 Q7, the difference is that the
DVD Changer is not on the MOST ring in the 2017 A4.
Driver Volume Control E67 is configured as the LIN slave of
Multimedia System Control Head E380.
J525
R78
(not for the NAR)
E67
E817
E380
J794
J285
J685
J587
J898
J533
J928
or
Key:
J772
Infotainment CAN
Modular Infotainment Platform (MIB) CAN
LIN bus
MOST bus
LVDS
FBAS
Ring break diagnostics line
"OR" configuration
Reference
For further information and general descriptions of the MOST150 and FlexRay buses, refer to Self-Study Program
970163, The 2017 Audi Q7 On-board Power Supply and Networking System.
12
646_051
FlexRay topology
A configuration in which more than one control module is
connected to a branch is known as a "daisy chain connection".
Data Bus On Board Diagnostic Interface J533 is the controller for the FlexRay bus. All FlexRay control modules are
connected to J533 via 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.
In the Audi A4, six branches are used: branches 1 – 5 and
branch 8. The pins of branches 6 and 7 are reserved in the
current version of J533, but are still not assigned.
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TSB/Document ID: SSP 970563 A
Replacement Service Bulletin Number:
MFR Communication Date: 2015-01-12
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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