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.
646_036
31
Electronic Stability Control (ESC)
Designation
ABS Control Module J104
Equipment
Always installed
Installation location
On left hand side of engine compartment
Tasks
Controlling:
• Anti lock braking system (ABS)
• Electronic Stability Control (ESC)
• Traction Control System (TCS)
• Electronic Differential Lock (EDL)
• Torque vectoring
• Multi-collision braking
• Electro-mechanical parking brake (EPB)
Address Word
03
Data bus communication
FlexRay participant
Special features
• The control module can be replaced separately from the valve block. ESD protective mat
VAS 6613 must be used.
• The electro-mechanical parking brake softward is integrated in the ABS control module.
Address word 53 is no longer used for electro-mechanical parking brake.
646_037
ABS Control Module
J104
32
Information electronics
Designation
Information Electronics Control Module 1 J794
Equipment
Always installed
Installation location
In glove compartment
Task
Controlling the infotainment systems
Address Word
5F
Data bus communication
• Infotainment CAN bus user
• MOST participant
• J794 is connected to the Front Information Display Control Head J685 and the Multimedia
System Control Head E380 via the Modular Infotainment System (MIB) CAN.
Special features
• J794 is the system manager and the ring break diagnostics master for the MOST bus.
• J794 is connected to the Instrument Cluster Control Module J285 and the Front Information Display Control Head J685 via LVDS bus (image transfer for navigation display in
instrument cluster or MMI display).
Information Electronics Control Module 1
J794
646_038
33
Sound amplification
Designation
Digital Sound System Control Module J525
Equipment
Optional equipment (PR no.: 9VS)
Installation location
In left hand side of luggage compartment, behind luggage compartment side trim
Task
Activation of up to 19 speakers
Address Word
47
Data bus communication
MOST participant
646_040
Digital Sound System Control Module
J525
34
Suspension control
Designation
Drivetrain Control Module J775
Equipment
Standard equipment with optional Audi adaptive suspension system
Installation location
Under center console storage bin
Tasks
Wheel damping control
• Reading input (senders/sensors/switches)
• Level control system sensors
• Activation (actuators/control elements)
• Damper adjustment valves
Address Word
74
Data bus communication
FlexRay participant
Special feature
J775 is responsible for driving dynamics control.
Drivetrain Control Module
J775
646_042
Power steering
Designation
Power Steering Control Module J500
Equipment
Always installed
Installation location
Connected to the steering gear.
Tasks
Controlling:
• Power steering
• Servotronic speed-responsive power steering
• Corrective steering inputs in conjunction with Audi active lane assist, park assist, evasion
assist and trailer assist
• Corrective steering inputs in conjunction with ESC
Address Word
44
Data bus communication
FlexRay participant
Special feature
The control module and power steering motor can only be replaced together with the steering
gear.
Power Steering Control Module
J500
646_043
35
Dynamic steering (not available at model introduction)
Designation
Active Steering Control Module J792
Equipment
Optional equipment (PR no.: 1N8)
Installation location
In driver's side footwell, under the floor covering
Tasks
• Calculating the super-imposition angle required to implement the variable steering ratio.
• Correcting the calculated super-imposition angle of the stabilizing function through ESC
intervention.
• Reading input (senders/sensors/switches)
• Index sensor
• Motor position sensor
• Activation (actuators/control elements)
• Dynamic steering actuator
• Dynamic steering lock
Address Word
1B
Data bus communication
FlexRay participant
Special features
Basic setting is necessary after:
• replacement by a new or different Active Steering Control Module J792
• replacement by a new or different steering column
• replacement by a new or different Steering Angle Sensor G85 or recalibration
• Changing the wheel alignment values
• Disconnecting the actuator from the steering column or the actuator from the steering
gear
646_044
Active Steering Control Module
J792
36
Exterior lighting
Headlight variants
Two headlight variants are available for the 2017 Audi A4:
• Xenon headlight (ECE1) and SAE2)) standard equipment
on Premium models
• LED headlight (ECE1) and SAE2)) standard equipment
for Premium plus and Prestige models
The headlights are connected to the vehicle body by adjusting elements. This makes it possible to align them precisely
with the other body components. Before the headlights can
be removed, the bumper cover must be removed and the
headlight washer nozzle unclipped from the headlight.
In the event of damage to the upper and inner headlight
attachments, repair tabs can be attached to the headlight
housing. The parts marked "Service" in the exploded-view
illustrations of the headlights on the following pages can
be replaced individually in the event of damage.
For information as well as the corresponding spare part
numbers, please refer to the repair literature and ETKA.
Xenon headlight
The illustration shows the left headlight in the ECE1) version. The SAE version is similar.
Sealing cover in headlight housing – access for changing bulb in foglight
"Service"
Left Headlamp Beam Adjustment
Motor
V48
Reflectors for LED daytime running light and side light
Left Front Turn Signal Bulb
M5
"Service"
Left HID Headlamp Bulb
L13
"Service"
Left Front Fog Lamp Bulb
L22
"Service"
1)
ECE = for European market
2)
SAE = for North American Region
646_054
Note
Left Front Fog Lamp Bulb L22 (for the all-weather light function) can be accessed via a cover on the back of the headlight
housing and can be replaced after the headlight has been installed.
37
LED headlights
Left Headlamp Beam Adjustment
Motor
V48
Left LED Headlamp Power Output
Module 1
A31
"Service"
Headlight module
Left Light Control Module
J1018
"Service"
Low beam module
Fiber optic cable for daytime running light /
side light, turn signal
646_055
38
Xenon headlight
The illustration shows the left hand headlight in the ECE1) version. The SAE version is similar.
Daytime running light/
parking light
Low beam/
main beam
646_057
All weather light
Light functions
Type of bulb used
Power
Daytime running light
4 LEDs
5 watts
Side light
Parking light is dimmed if light function is active
Gas discharge lamp D5S
Changes over from low beam using shutter
All weather light
Bulb H8
35 watts
Bulb PSY24W
24 watts
1 LED
0.5 watts
Turn signal
Sidemarker (SAE only )
2)
25 watts
Special features of the light functions
The daytime running lights are switched off for the duration of a turning cycle. The all-weather light is switched off
during the turning signal cycle as soon as the vehicle
exceeds a speed of 25 mph (40 km/h). The all-weather light
in both versions is deactivated during the turn signaling
cycle as soon as the vehicle exceeds a speed of 40 kph.
1)
ECE = for European market
2)
SAE = for North American Region
Left and Right Low Beam Headlamp Reflector Motors V294
and V295 are used for switching between low and high
beams. The LEDs for the side light function and the low
beams of the gas discharge lamps are used for the Coming
Home/Leaving Home function.
39
Schematic diagram of the activation mechanism
Vehicle Electrical System Control Module
J519
Convenience CAN
−− Voltage supply
−− Activation of light functions
−− Calculation/activation of headlight range adjustment
Discrete lines
Gas discharge headlight
(left hand side of vehicle)
−− Control module
−− Low beam shutter
−− Fog light bulb, left
−− Turn signal bulb, front left
−− LEDs for parking lights and daytime running lights
−− LEDs for front left side marker light (SAE2))
−− Beam-height adjustment servo motor
646_058
Activation
Service
Vehicle Electrical System Control Module J519 is responsible for power supply as well as for activating all bulbs in
the headlight. J519 also activates the low beam shutter
and the headlight range adjustment control motors.
The basic setting of the headlight range adjustment function is configured by J519. The foglamp bulb can be
replaced with the headlights installed. This bulb can be
accessed via a cover on the back of the headlight housing.
The headlight must be removed in order to replace the gas
discharge lamp or the turn signal lamp.
Headlight range adjustment
The gas discharge headlight has automatic static headlight
range adjustment. This means that changes in headlight
range are compensated for when the vehicle is loaded
differently. However, changes caused by rolling movements
of the vehicle under acceleration and braking are not compensated.
J519 receives information about ride height from either
Comfort System Central Control Module J393 or, if
installed, Drivetrain Control Module J775.
1)
ECE = for European market
2)
SAE = for North American Region
40
Optional equipment
The xenon headlight can be combined with main beam
assist (PR no.: 8G1).
LED headlight
The figure shows the left hand headlight in the ECE1) version.
Daytime light/
side light/
turn signal
646_059
Daytime running light/
parking light
Turning light/
all-weather light/
static cornering light
Daytime running light/
parking light
Light functions
Type of bulb used
Power
Daytime running light
7 LEDs with plastic optical fibers
18 watts
Side light
Parking light is dimmed if light function is active
11 LEDs
20 watts
6 LEDs
20 watts
All weather light
3 LEDs
10 watts
Turning light
0 - 25 mph (0 - 40 km/h), turn signal responsive
Static cornering light
0 - 43 mph (0 - 70 km/h), steering angle responsive
8 LEDs
18 watts
Sidemarker (SAE only2))
1 LED
0.5 watts
Special features of the light functions
The "upper" daytime running light is dimmed for the duration of the turn signaling cycle. The "lower" daytime
running light is dimmed to side light level. The all-weather
light is not affected by turn signal operation.
1)
ECE = for European market
2)
SAE = for North American Region
The LEDs for the side light function and the low beam
function are used for the Coming Home / Leaving Home
function.
41
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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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