960243

eSelf Study Program 960243
The 2015 A3 Cabriolet
2
Audi of America, LLC
Service Training
Created in the U.S.A.
Created 06/2014
Course Number 960243
©2014 Audi of America, LLC
All rights reserved. Information contained in this manual is based on
the latest information available at the time of printing and is subject to
the copyright and other intellectual property rights of Audi of America,
LLC., its affiliated companies and its licensors. All rights are reserved
to make changes at any time without notice. No part of this document
may be reproduced, stored in a retrieval system, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording
or otherwise, nor may these materials be modified or reposted to other
sites without the prior expressed written permission of the publisher.
All requests for permission to copy and redistribute information should
be referred to Audi of America, LLC.
Always check Technical Bulletins and the latest electronic service repair
literature for information that may supersede any information included
in this booklet.
Revision 1: 5/28/2014
3
Contents
Introduction.......................................................................................7
Body...................................................................................................9
Structure/materials ................................................................................................................................................. 9
Convertible top................................................................................ 13
Movable convertible top well ................................................................................................................................ 15
Convertible top box lid/service position .............................................................................................................. 16
Convertible top frame ........................................................................................................................................... 17
Hydraulic unit ......................................................................................................................................................... 18
Convertible top control system....................................................... 19
Component locations ............................................................................................................................................ 19
Convertible top operation ..................................................................................................................................... 21
Components of the convertible top control system ........................................................................................... 33
Emergency operation ............................................................................................................................................ 45
Data bus overview .................................................................................................................................................. 48
Occupant protection........................................................................ 49
Side airbag .............................................................................................................................................................. 51
Electrical wiring harness for side airbag ............................................................................................................. 52
Driver Side Rear Side Airbag Crash Sensor G256 ................................................................................................ 52
Rollover protection ................................................................................................................................................ 53
Cassettes with protective roll bars ...................................................................................................................... 54
Driver Side Rollover Protection Igniter N646 and
Front Passenger Side Rollover Protection Igniter N647 .................................................................................... 54
Resetting a deployed protective roll bar .............................................................................................................. 56
Diagnostics ............................................................................................................................................................. 56
Engines............................................................................................ 57
1.8L and 2.0L TFSI engines ................................................................................................................................... 57
Engine/transmission combinations................................................. 59
Suspension...................................................................................... 61
Overall concept ..................................................................................................................................................... 61
Overview ................................................................................................................................................................. 62
Electrical system............................................................................. 63
Installation locations of control modules ........................................................................................................... 63
Topology ................................................................................................................................................................. 65
Climatronic...................................................................................... 67
Operation ................................................................................................................................................................ 68
Infotainment................................................................................... 71
Overview of versions .............................................................................................................................................. 71
Antenna system ..................................................................................................................................................... 75
Service............................................................................................. 77
Service interval overview for North American region ......................................................................................... 77
Self Study Program......................................................................... 78
Knowledge Assessment.................................................................. 80
4
This eSSP contains video links which you
can use to access interactive media.
Note
This eSelf Study Program teaches a basic knowledge of the design and functions of new models,
new automotive components or technologies.
It is not a Repair Manual! All values given are intended as a guideline only.
For maintenance and repair work, always refer to the current technical literature.
5
Reference
Audi A3 Cabriolet ’15
Sporty, elegant and multi-faceted - the new 2015 Audi A3
Cabriolet. This compact four seater impresses at first
glance with its flowing lines and and soft top. It is also at
the top of its class technically with systematic lightweight
design, new engines, sophisticated networking and high
performance driver assistance systems.
The A3 Cabriolet has a soft top that is stretched over a
lightweight magnesium and steel kinematic mechanism.
At the press of a button,the top opens or closes electrohydraulically in less than 18 seconds; even when driving up
to speeds of 31 mph (50 km/h). The fully automatic top
has a glass rear window with an electric rear defroster. An
active rollover protection system protects the occupants in
case of a rollover accident.
As with every Audi, workmanship quality is uncompromisingly high, and the vehicle’s controls are simple, intuitive and
convenient. The A3 Cabriolet offers enough room for four
adults. The rear seats can be folded down to create a wide
through-load area when the top is up. The interior features
new steering wheel and seat designs as well as an electromechanical parking brake operated by a push button on the
center console.
All engines in the new A3 Cabriolet combine the high technologies of direct fuel injection and turbocharging. On
average, the two engines offered at market launch have
excellent fuel economy while offering a high performance
driving experience (1.8 and 2.0L).
The chassis of the A3 Cabriolet uses sophisticated technology that delivers sporty handling, superior vehicle safety
and a high level of comfort. Some components of the
MacPherson strut front suspension are made of aluminum
while the four-link rear suspension handles longitudinal
and transverse forces separately. The power steering
system features an efficient electro-mechanical drive.
The ABS/ESP system has all the features offered on other
Audi vehicles which provide safe, stable and predictable
operation.
623_001
6
Introduction
55.4 in (1409 mm)
Dimensions
37.2 in (1526 mm)
61.2 in (1555 mm)
60.07 in (1526 mm)
70.5 in (1793 mm)
77.1 in (1960 mm)
34.21 in (869 mm)
102.16 in (2595 mm)
mm
)
21
2 (9
26.9 in (685 mm)
36.
39.3
in (10
00 m
m)
623_002
37.67 in (957 mm)
174.05 in (4421 mm)
623_003
7
39.3 in (1000 mm)
45.7 in (1162 mm)1
47.3 in (1203 mm)2
54.8 in (1392 mm)1
57.7 in (1468 mm)2
38.7 in
(984 mm)
623_004
Length
174.05 in (4421 mm)
Cabin width, front1)
57.7 in (1468 mm)
Width
70.5 in (1793 mm)
Cabin width, rear
47.3 in (1203 mm)
Height
55.4 in (1409 mm)3)
Headroom, front2)
39.3 in (1000 mm)
Track width, front
61.2 in (1555 mm)
Headroom, rear
36.2 in (921 mm)
Track width, rear
60.07 in (1526 mm)
Load sill height
26.9 in (685.0 mm)
Wheelbase
102.1 in (2595 mm)
Trunk capacity
11.3 cu ft (320 l)
Trailer load
with brake at a gradient of 8 %
3968.3 lb (1800 kg)
Fuel tank capacity
13.2 gal (50.0 l)
Curb weight
3152.6 lb (1403 kg)
Drag coefficient in cw
0.30
Max. gross weight
4254.9 lb (1930 kg)
Shoulder room width
Maximum headroom
3)
excluding mirror
1)
2)
8
Body
Structure/materials
The body of the 2015 A3 Cabriolet is based on the 2015 A3
sedan. Thanks to Audi ultra-lightweight technology, convertible specific elements such as the ‘A’ pillar, front roof
frame, rear bulkhead and the underbody are designed so
they do not add undesirable weight to the vehicle.
Lightweight steel components
The front fenders, doors, convertible top box lid, trunk lid and
rear bumper cross member are made from lightweight steel.
The front bumper cross member and hood are made from
aluminum.
9
Key:
623_106
Ultra-high strength hot-formed steel
Advanced high strength steel
High strength steel
Low strength steel
Sheet aluminium
Aluminium section
10
A-pillar reinforcement
The 2015 A3 cabriolet affords a high level of safety in the
event of a rollover accident through its extremely stiff
two-component A-pillar structure.
The A-pillar is constructed with a modern high tensile
strength inner plate and a ultra-high strength hot-formed
steel reinforcement tube.
Reinforcing tube
Inner A pillar
623_107
Side member, sill, and seat cross member reinforcements
Various additional reinforcements are used to ensure the
body structure meets the high convertible specific strength
requirements in the side member, sill, seat cross member
and B-pillar areas. To provide better side impact protection, the seat cross member located between the B-pillars
is made from ultra-high strength hot-formed steel.
Seat cross-member
B-pillar with
reinforcements
Reinforcement
Side member/sill
623_108
11
Rear bulkhead
Additional body strengthening is provided by the rear
bulkhead. High strength sheet steel is used to provide
extremely high rigidity in crash relevant areas like the
rollover protection system mounting points.
This not only provides optimum safety for the vehicle
occupants, it also increases the stiffness of the occupant
cell significantly.
Rollover protection system mounting
Rear bulkhead
623_109
Door side impact reinforcement
Side impact protection
623_110
Additional reinforcements
12
Convertible top
The Audi A3 Cabriolet roof is a classical soft top design
known as a K fold system.
The frame is made of magnesium, aluminum and steel components. It opens electro-hydraulically in less than 18
seconds even while driving at speeds up to 31 mph (50 km/h).
When the top is opened it folds into three layers and is stored
in its own well.
The soft top is made from rugged materials and has an
integral heated glass rear window. This makes the A3
Cabriolet suitable even for winter use.
The complete convertible top (frame and cover) weighs
approximately 112 lb (51 kg).
Roof bow
Roof bow
Welting stitched into the convertible top cover slides
into grooves in the roof bows. The cover can be removed
and installed by pulling or pushing it from the sides,
simplifing repairs. The interior headliner clips to the
underside of the roof bows.
Convertible top cover with
sound insulating foam
Convertible top
cover welting
Roof bow
Headliner retaining strip
Headliner
623_111
13
Convertible top fabric
The convertible top cover itself is a three-layered structure.
The outer layer is made of an acrylic nitrile fabric, the
middle layer of butyl rubber while the inner layer is a polyester fabric. The cover is a three part design; it has a middle
panel and two side sections.
Convertible top cover
Sound insulating foam
Interior lining
623_112
Rear window
The glass rear window is made of 3.15
mm toughened safety glass and is
electrically heated. It is bonded to the
convertible top cover.
AM antenna (AM2, R11)
AM2 is sewn into the convertible
top material.
Tensioning strut
The tensioning strut sits on the convertible top box lid when the top is closed and
locked into position. This allows the
hydraulic system to be depressurized after
closing.
623_113
!
Note
The integrated glass rear window cannot be replaced separately from the convertible top cover.
14
Movable convertible top well
A movable convertible top well is located in the luggage
compartment of the A3 Cabriolet.
The top can only be lowered when the movable convertible
top well is in its lowest position. It is lowered manually by
using a pull handle.
Windbreak
The windbreak reduces drafts inside the vehicle for greater
comfort when driving with the top down.
It attaches to the rear side trim panels behind the front
seats and is then moved into an upright position.
The windbreak can remain installed in the vehicle when the
convertible top is closed or it can be stored in its own bag in
the luggage compartment when removed.
15
When the convertible top is closed, the movable convertible top well can be raised to provide more room in the
luggage compartment.
Convertible top box lid/service position
The convertible top box lid is a lightweight steel component that protects the top when it is down. The lid is
opened and closed by two hydraulic cylinders mounted on
the left and right hinges.
Convertible top box lid
T 10038
During repair work on the convertible top, both the top and
the convertible top box lid must be moved into a service
position. To prevent the top from closing, both knee hinges
must be pushed towards the tensioning strut at the upper
pivot point as far as the stop.
T 40306
T 40306
A tensioning strap (T10038) and two hooks (T40306) are
then attached to the top centrally at the front and rear
edges and hold the top in its assembly position.
Knee hinge
623_114
Movable convertible top well top well,
upper position
Convertible top, lower position
623_115
16
Convertible top frame
Roof bows 1 - 4 are made from extruded aluminum sections. Because of its complex design, the front roof bow is
made from high grade magnesium. The use of these materials enables the top frame to meet high standards for
stability and strength.
The convertible top frame is bolted to the car body on both
the left and right side with a main bearing attached to a
mounting plate. The position of the plate is defined by the
reference point system (RFS) of the car body during manufacturing and cannot be changed.
Roof bow tensioning strap
Front roof bow
Convertible top
locking motor
Roof bow 1
Roof bow 2
Roof bow 3
Convertible top lock
Roof bow 4
Hydraulic cylinder
for tensioning strut
Front roof
rod
AM antennas
Tensioning strut
Rear roof rod
Main side bar
Hydraulic cylinder
Convertible top box lid
Hydraulic cylinder
for tensioning strut
Rear window
Main bearing with
hydraulic cylinder for
convertible top
Hydraulic unit
Hydraulic cylinder
Convertible top box lid
623_116
Main bearing service tools
T40307
Two spacers (special tool T40307) are inserted into the left
and right main bearings from above when the top is
removed. They remain installed in the main bearings during
the time the top is removed and stored during repairs.
When the top is removed, the spacers replace the missing
stop buffers on the car body and prevent damage to the top
cover and frame.
!
17
Note
Please follow the instructions given in the Electronics Service Information during all work on the convertible top.
Hydraulic unit
An electric motor, valve block (including pump and valves)
and an oil tank make up the hydraulic unit.
The pump rotation only needs to be reversed to move the
tensioning strut into position when raising the top.
Plastic sheathed flexible metal spiral hoses connect the
hydraulic cylinders to the hydraulic unit. Relays J588 and
J321 are clipped onto the hydraulic unit and control the
operating current for the clockwise and counter-clockwise
operation of the pump.
Pump pressure is limited to 2611 psi (180 bar) by pressure
limiting valves.
When the system is at rest, the hydraulic fluid can flow
back from the hydraulic cylinders to the fluid reservoir
unpressurized. This operating feature also allows the
emergency operation of the top.
When the top is being raised or lowered, the pump runs
and valves 1 - 3 control the flow of fluid according to the
required sequence of movements.
Plastic-sheathed flexible
metal spiral hose
Valve block
Power Convertible Top Valve 2
N341
Electric motor
Power Convertible Top Valve 1
N272
Power Convertible Top Valve 3
N342
Oil filler bolt
Oil reservoir
Convertible Top Hydraulic
Pump Relay 2
623_118
Convertible Top Hydraulic
Pump Relay J321
Bleeding the system
Hydraulic cylinder
No bleeding process needs to be done after repairs to the
hydraulic system. The system is bled automatically
during operation.
Bi-directional hydraulic cylinders are used. They are activated
according to the convertible top movement sequence.
Solenoid valves
The hydraulic system uses 3/2 way valves (3 connections
and 2 switch positions) which are operated by solenoids.
Oil flows from the hydraulic cylinders and into the oil reservoir when the valves are de-energized and from the pump
to the cylinders when energized.
The valves are activated by Convertible Top Control
Module J256 for up to five minutes. The top can be emergency operated immediately after the valves have been
switched off. When the valves are de-energized after five
minutes, the hydraulic system depressurizes.
18
Convertible top control system
Component locations
F412
F294
F295
V223
F411
J285
E137
19
Key
J256
J285
E137
Power Top Operation Switch
F171
F202
F293
F294
F295
F404
F407
F408
F411
F412
F517
F519
F520
Convertible Top Open Position Switch
Convertible Top Front Closed Position Switch
Convertible Top Compartment Latch -Unlocked- Switch
Convertible Top Latch -Open- Switch
Convertible Top Latch -Closed- Switch
Convertible Top Compartment -Locked- Switch
Convertible Top Compartment -Open- Switch
Upper Tensioning Bow Switch
Left Convertible Top Closed Position Switch
Right Convertible Top Closed Position Switch
Lower Bracket Switch
Convertible Top Compartment Cover -Closed- Switch
Lower Convertible Top Compartment Enclosure Switch
J321
J588
Convertible Top Control Module
Instrument Cluster Control Module (diagram showing
convertible top status)
Convertible Top Hydraulic Pump Relay
Convertible Top Hydraulic Pump Relay 2
N272
N341
N342
Power Convertible Top Valve 1
Power Convertible Top Valve 2
Power Convertible Top Valve 3
V118
V222
V223
Convertible Top Hydraulic Pump
Convertible Top Compartment Cover Locking Motor
Convertible Top Locking Motor
F520
F519
F404
F293
V222
J256
N341
N272
N342
F171
J588
F202
F408
F407
V118
623_023
J321
F517
20
Convertible top operation
Power Top Operation Switch E137
The convertible top opening cycle is started by pulling
Power Top Operation Switch E137. To open the convertible
top completely, the switch must remain pulled until the
opening cycle is complete. When the switch is released, the
convertible top cycle stops instantaneously. If the switch is
pulled again, the convertible top continues to open. If the
switch is pressed, the convertible top closes.
The switch must also be remain pressed during the
closing cycle.
If the convertible top is closed and the switch is pulled and
then released again, the side windows will lower to a
defined level. The convertible top cycle will not start. If the
button is kept pressed for 5 seconds, the side windows
close again.
623_024
Power Top Operation Switch E137
Graphic displays for convertible top operation
The operation of the convertible top is indicated graphically
in the Driver Information System (DIS) of Instrument
Cluster Control Module J285.
The display will either be in color or monochrome depending on the Instrument Cluster version.
As soon as the top starts to open or close, the graphic
display appears in the DIS.
A curved arrow over the convertible top indicates the direction of the convertible top. If the arrow tip is pointing back,
the convertible top is opening. If the arrow tip is pointing
forward, the convertible top is closing.
Convertible top opening cycle
21
623_025
Convertible top opening cycle
623_026
If no arrow is displayed over the convertible top, the convertible top cycle has been initiated but aborted. The convertible top is in an intermediate position.
Convertible top cycle aborted, intermediate position
623_027
Convertible top cycle aborted, intermediate position
623_028
If the convertible top cycle has been completed, the status
of the convertible top (opened or closed) is indicated for
approximately 2 seconds. An audible signal sounds at the
same time.
Convertible top cycle completed, convertible
top closed
623_029
Convertible top cycle completed, convertible
top closed
623_030
Convertible top cycle completed, convertible
top open
623_051
Convertible top cycle completed, convertible
top open
623_052
22
If convertible top operation is not possible, an audible
warning is sounded by the Instrument Cluster and one of
nine visual warnings is given in the DIS.
The warning is given if:
• The convertible top is in the intermediate position.
• There is a DTC in the fault memory.
• The vehicle is traveling faster than 3.1 mph (5 km/h).
Warnings are indicated via the color DIS as follows:
Triangle with exclamation mark in the driver information
and warning lamps tab
Yellow vehicle-with-convertible-top icon in the
status line
Convertible top:
malfunction!
Displayed text
you can continue driving
(limited functionality).
See owner's manual
Yellow central warning lamp
623_031
Warnings are indicated via the monochrome DIS as follows:
Exclamation mark in driver information tab and warning
lamps tab
Vehicle convertible top icon in the status line
Convertible top:
malfunction!
Displayed text
you can continue driving
(limited functionality).
See owner's manual
Yellow central warning lamp
623_032
23
Other reasons why a convertible top operation is not
possible are displayed as messages.
Display of the 9 functional or visual messages in the DIS:
•
The yellow warning lamp is NOT activated when the functional or visual messages messages are displayed.
•
Messages are indicated by a white vehicle-with-convertible-top icon in the status line in both the color and monochromeDriver Information System displays.
•
Message texts are NOT included in the driver information and warning lamps tab.
If the convertible top is in a limit position (open or closed) and a convertible top cycle is initiated in the limit stop direction,
no actions are initiated and no messages are displayed.
To activate messages, the following conditions must be met:
The trunk lid is open and the convertible top operating
switch is actuated.
Convertible top:
Please close
boot lid
623_033
The convertible top well is in the upper position and the
convertible top operating switch is actuated in the "open"
direction.
Convertible top:
Please
lower convertible
top well
623_034
The convertible top is in a limit position (open or closed),
the vehicle is travelling faster than 31 mph (50 km/h) and
the convertible top operating switch is actuated.
Convertible top:
no operation
possible.
Speed
too high
623_035
24
A convertible top cycle is currently active and the vehicle's
speed increases to over 31 mph (50 km/h).
or
the convertible top is in an intermediate position and the
vehicle speed exceeds 31 mph (50 km/h).
Convertible top:
not in limit position.
Speed
too high
623_036
The ambient temperature is below 5 °F (-15 °C), the convertible top is closed and the the operating switch is actuated in the “open” direction.
An open convertible top can be closed at temperatures
below 5 °F (-15 °F).
Convertible top:
no operation
possible.
Ambient temperature
too low
623_037
Convertible Top Control Module J256 has registered a DTC
and the switch is actuated.
Convertible top:
no operation
possible
623_038
25
The vehicle battery voltage has dropped below a threshold
value; the ignition is switched ON, the engine is not running,
and the convertible top operating switch is actuated.
Convertible top:
no operation possible.
Engine must be running
623_039
The overload protection is active and the convertible top
operating switch is actuated.
Convertible top:
no operation
possible
623_040
Convertible Top Control Module J256 has registered a DTC,
the limit position (open or closed) has been reached and
the convertible top operating switch is released.
Convertible top:
malfunction!
You can continue driving
623_041
26
Convertible top opening sequence
To open the convertible top, the following conditions must be met:
• The vehicle must not be travelling faster than 31 mph (50 km/h)
• The power top operation switch E137 must be pulled and held
• The ambient temperature must be above 5 °F (-15 °C)
•
•
•
•
The convertible top well must be in the lower position
The trunk lid must be closed
The vehicle battery voltage must be sufficient
Both front and rear side windows must have pinch protection activated
Initial situation: the convertible top is closed
Assuming the previous conditions are met and Power Top
Operation Switch E137 remains pulled up, all the side
windows will lower to a defined position.
623_043
623_042
Convertible Top Operation Switch E137
A vehicle image appears in the Driver Information System
display showing the vehicle with a convertible top and a
curved arrow. The arrow tip is pointing back.
Convertible top opening cycle
623_044
The Release Button in Rear Lid Handle E234 is deactivated
so the trunk lid cannot be opened.
27
Convertible top opening cycle
623_045
If the rear window defroster is ON, it is switched OFF. The
rear window defroster can only be switched ON when the
convertible top is fully closed.
The catch hooks in the upper part of the lock in the windshield frame area are opened. The tensioning strut begins
to move into the upright position.
623_046
At the same time, Convertible Top Compartment Cover
Locking Motor V222 opens the convertible top box lid. The
tensioning strut moves into the upright position. The convertible top box lid opens fully.
623_047
The convertible top retracts and folds down into the convertible top well. Meanwhile, the catch hooks close again.
623_048
After that, the convertible top box lid closes and V222 locks
it into position.
623_049
An acoustic signal and graphic display indicate that the
convertible top cycle is complete and the convertible top is
fully open.
Convertible top cycle completed, convertible
top open
623_051
Convertible top cycle completed, convertible
top open
623_052
Finally, the side windows raise to their closed position and
the Release Button in Rear Lid Handle E234 is re-activated
so the trunk lid can be opened.
623_050
28
Convertible top closing sequence
To be able to close the convertible top, the following conditions
must be met:
•
•
•
•
The vehicle must not be travelling faster than 31 mph (50 km/h)
The function must be activated
The trunk lid must be closed
The vehicle battery voltage must be sufficient
Initial situation: the convertible top is open
Assuming the previous conditions are met and Power Top
Operation Switch E137 remains pressed, all the side
windows will lower to a defined position.
623_046a
623_042
Power Top Operation Switch E137
A vehicle image appears in the Driver Information System
display showing the vehicle with a convertible top and a
curved arrow. The arrow tip is pointing forward.
Convertible top closing cycle
623_053
The Release Button in Rear Lid Handle E234 is deactivated
so the trunk lid cannot be opened.
29
Convertible top closing cycle
623_054
Convertible Top Compartment Cover Locking Motor V222
unlocks the convertible top box lid. The convertible top box
lid opens fully.
623_046b
The convertible top lifts up out of the convertible top box
and the catch hooks in the upper part of the convertible top
lock open.
623_046c
The tensioning strut moves into the upper position and the
convertible top box lid closes fully. V222 locks the convertible top box lid.
623_046d
The convertible top continues to run until it settles on top
of the windshield frame. At the same time, the tensioning
strut moves down. The catch hooks then lock the convertible top in place.
623_046e
An acoustic signal and graphic display indicate that the
convertible top cycle is complete and the convertible top is
fully closed.
Convertible top cycle completed, convertible
top closed
623_055
If E137 is kept pressed, the side windows raise to their
closed position.
Convertible top cycle completed, convertible
top closed
623_056
The Release Button in Rear Lid Handle E234 is re-activated
so the trunk lid can be opened. The rear window defroster
can be switched on again.
30
Opening the convertible top with the vehicle key
The convertible top can be opened and closed using the
vehicle key in the driver’s door lock cylinder. The following
conditions must be met:
•
•
•
•
The convertible top well must be in the lower position.
The trunk lid must be closed.
The ambient temperature must be above 5 °F (-15 °C).
The battery voltage must be sufficient.
To lower the convertible top:
•
•
Insert the key in the driver’s door lock cylinder and turn
it in the “open” direction, then release.
Turn the key to the “open” direction again within 2
seconds and hold it in that position.
The convertible top cycle will start. The key must be held in
the “open” position during the convertible top cycle. If the
key is released, the cycle will immediately stop. To resume
the cycle, the key must again be turned in the “open” direction and held in that position.
If the key is turned in the “close” direction and held in this
position, the convertible top will close again.
623_057
Closing the convertible top with the vehicle key
The convertible top can also be closed using the car key.
Before this can be done, the following conditions must
be met:
• The trunk lid must be closed.
• The battery voltage must be sufficient.
To close the convertible top:
•
•
Insert the key in the driver’s door lock cylinder and turn
it in the “close” direction, then release.
Turn the key to the “close” direction again within 2
seconds and hold it in that position.
The convertible top cycle will start. The key must be held in
the “close” position during the convertible top cycle. If the
key is released, the cycle will immediately stop. To resume
the cycle, the key must again be turned in the “close”
direction and held in that position.
If the key is turned in the “open” direction and held in this
position, the convertible top will open again.
623_058
!
31
Note
When opening or closing the convertible top with the vehicle key, there may be a short delay between the time the key is
turned to when the operation begins.
Operating the convertible top while driving
The convertible top can be opened or closed using Power Top
Operation Switch E137 up to a speed of 31 mph (50 km/h).
If the vehicle speed increases to over 31 mph (50 km/h)
during the top cycle, the driver will be alerted both audibly
and visually. The top cycle is stopped and a the top comes
to a standstill in its current position. The cycle will not
resume until the vehicle speed has dropped below 31 mph
(50 km/h) or less.
Convertible top:
not in limit position.
Speed
too high
To do this, the operating switch must be kept pulled or pressed.
Message text
623_059
A convertible top cycle cannot be initiated if the vehicle is
travelling at a speed over 31 mph (50 km/h). In this case
too, the driver is alerted by audible and visual warnings.
Convertible top:
no operation
possible.
Speed
too high
Message text
623_060
32
Components of the convertible top control system
Power Top Operation Switch E137
The Power Top Operation Switch E137 is located in the
center console.
623_061
Power Top Operation Switch E137
Hall sensors
Controlled operation of the convertible top is only possible if
Convertible Top Control Module J256 receives information
from various sensors and switches during each phase of the
operating cycle. The sensors and switches indicate the
current position of certain parts of the top assembly to
J256.
J256 uses this information to control the actuators, and
thus, the operation of the top.
In a Hall sensor, a magnetic field acts perpendicular to the
direction of current flow in an electrical conductor resulting
in voltage differences. These voltage differences are converted to signals and utilized by Convertible Top Control
Module J256.
The distance between a Hall sensor and permanent magnet
is typically 0.1 in (3 mm).
The following Hall sensors react to the fields generated by
permanents magnets:
• Lower Convertible Top Compartment Enclosure Switch F520
• Left Convertible Top Closed Position Switch F411
• Right Convertible Top Closed Position Switch F412
• Convertible Top Compartment Cover -Closed- Switch F519
• Convertible Top Front Closed Position Switch F202
• Convertible Top Open Position Switch F171
Hall sensor
Permanent magnet
• Left Tensioning Bow Switch F408
These Hall sensors are referred to as monopolar or unipolar
Hall sensors. They react to the south pole of a permanent
magnet.
623_063
Switching distance
33
Upper Tensioning Bow Switch F408
Upper Tensioning Bow Switch F408 is a Hall-type sensor
installed on the long tensioning strut pivot arm on the left
hand side of the vehicle. A permanent magnet is attached
to the joint on the pivot arm.
When the tensioning arm reaches its upper position, F408
and the permanent magnet are facing one another. In this
position, Convertible Top Control Module J256 detects that
the tensioning strut is up.
Upper Tensioning Bow Switch F408
623_069
Lower Convertible Top Compartment Enclosure Switch F520
F520 is installed on the movable convertible top well at the
right hand side of the vehicle. It is a Hall sensor that detects
whether the movable convertible top well is in the lowered
position. The convertible top cannot be opened when the
movable convertible top well is in the upper position.
Handle
Movable convertible top well
The convertible top well has to be manually raised or lowered
by pulling or pushing on its handle. When the convertible top
is closed and the top well raised, an additional 1.4 cu ft (40
liters) of load capacity is available in the trunk and greater
access to the seat pass thru is available..
Lower Convertible Top Compartment Enclosure Switch F520
623_064
Left Convertible Top Closed Position Switch F411 and
Right Convertible Top Closed Position Switch F412
F411 and F412 are located on the left and right hand
convertible latch locks. They are both Hall sensors.
Convertible Top Locking Motor V223 engages and disengages the catch hooks on the convertible top. When the
catch hooks are engaged in the locks, each switch sends a
signal to the Convertible Top Control Module J256 indicating the top is closed.
Catch hook
Convertible Top Closed Position Switch
Permanent magnet
623_065
34
Convertible Top Compartment Cover -closed- Switch F519
F519 is located on Convertible Top Compartment Cover
Locking Motor V222. It is a Hall sensor.
A permanent magnet is attached to the striker. When the
convertible top box lid is closed, the magnet is directly
facing F519. Convertible Top Control Module J256 detects
that the top box lid is closed.
Striker on convertible
top compartment
Convertible Top
Compartment Cover
-closed- Switch F519
623_066
Convertible Top Front Closed Position Switch F202
F202 is installed in the direction of travel on the stationary
part of the main bearing bolted to the body on the left
hand side of the vehicle. It is a Hall sensor.
A permanent magnet is attached to the moving part of the
main bearing. If the magnet stops within the detection
range of the switch, Convertible Top Control Module J256
detects that the top is in the closed position.
Permanent magnet
623_067
Convertible Top Front Closed Position Switch F202
35
Convertible Top Open Position Switch F171
F171 is installed on the stationary part of the main bearing
on the left hand side of the vehicle. The switch is a Hall
sensor.
A permanent magnet is attached to the moving part of the
main bearing. If the magnet stops within the detection
range of the switch, Convertible Top Control Module J256
knows that the top is in its fully open position (stowed in
the convertible top compartment).
Permanent magnet
623_068
Convertible Top Open Position Switch F171
Convertible Top Compartment Cover Locking Motor V222
V222 locks the convertible top box lid. It is activated by
Convertible Top Control Module J256.
623_070
Convertible Top Compartment Cover Locking Motor V222
36
Convertible Top Compartment Latch -unlocked- Switch F293
and Convertible Top Compartment -locked- Switch F404
Both switches are integrated in Convertible Top Compartment Cover Locking Motor V222. These switches tell Convertible Top Control Module J256 whether the convertible
top box lid latch is engaged or disengaged.
Convertible Top Compartment Latch
-unlocked- Switch F293
The microswitches are actuated by tabs on the toothed
segment.
This switch tells Convertible Top Control Module J256
whether the convertible top box lid latch is engaged or
disengaged.
623_070
Convertible Top Compartment -locked- Switch F404
Trunk lid
The convertible top can only be operated when the trunk lid
is closed. When an opening or closing cycle is initiated,
Vehicle Electrical System Control Module J519 prevents the
trunk lid from being opened via the Release Button in the
Rear Lid Handle E234.
623_072
Switch for releasing the trunk lid
If a convertible top cycle is initiated when the trunk lid is
opened, a message is displayed in the DIS advising the
driver to close it.
Convertible top:
Please close
trunk lid
37
623_073
Convertible Top Hydraulic Pump V118
V118 includes:
•
•
•
•
•
Convertible Top Hydraulic Pump Relay J321
Convertible Top Hydraulic Pump Relay 2 J588
Power Convertible Top Valve 1 N272
Power Convertible Top Valve 2 N341
Power Convertible Top Valve 3 N342
The hydraulic pump together with the relays and valves
form a unit. The hydraulic pump is installed in the trunk,
behind the luggage compartment trim on the left-hand
side as seen in the direction of travel. The hydraulic pump is
housed in an acoustic enclosure which provides sound
insulation during pump operation.
623_074
Convertible Top Hydraulic Pump V118
Convertible Top Control Module J256 controls the hydraulic
pump via the two relays. The relays control the clockwise
and counter-clockwise operation of the pump.
relay. By switching the relay being operated, the direction
of the motor is controlled which in turn changes the direction of fluid flow from the pump.
This is done by operating only one of the two relays to
supply power to the pump. The non-operated relay supplies
the ground circuit for the pump via the 87a terminal on the
The valves guide the oil flow through the hydraulic lines
and into the hydraulic cylinders.
Power Convertible Top Valve 2
N341
Power Convertible Top Valve 1
N272
Power Convertible Top Valve 3
N342
Convertible Top Hydraulic
Pump Relay J321
623_118
Convertible Top Hydraulic
Pump Relay 2 J588
38
The hydraulic system is self-locking. This means that the
pressure generated by the pump is maintained within the
system for approximately 5 minutes. After 5 minutes, the
valves are de-energized and the hydraulic system de-pressurizes.
Collision of the convertible top and convertible top box lid
If the convertible top is in an intermediate position and the
hydraulic system de-pressurizes, the top will collapse
depending on its position. Also, the convertible top box lid
may close depending on its position.
In the worst case scenario, the convertible top will collide
with the convertible top box lid and may become damaged.
It may happen that neither the convertible top box lid nor
the convertible top reaches one of its limit positions. In
this case, it is no longer possible to operate the convertible
top because Convertible Top Control Module J256 receives
implausible signals. When this happens, the driver will be
alerted by a message in the DIS.
623_076
To continue operating the convertible top, the convertible
top box lid must be moved manually into a limit position.
The top cycle can then be resumed. If the limit position
was reached by opening the convertible top box lid, it must
be secured to prevent it from slamming shut.
The hydraulic system can also be de-pressurized by switching the ignition off and then push or pull the Power Top
Operation Switch E137 for approximately 5 seconds.
623_077
Power Top Operation Switch E137
39
Hydraulic cylinders
The convertible top and convertible top box lid are operated
by three pairs of hydraulic cylinders.
Two cylinders are responsible for operating the convertible
top box lid. Two are responsible for the tensioning strut
and two are responsible for the convertible top.
Cylinder pair for
tensioning strut
Cylinder pair for convertible top
Cylinder pair for
convertible top box
lid
623_078
The hydraulic cylinders operate in two working directions.
Compression stage
Hydraulic cylinder
Tension stage
Piston rod
623_079
Hydraulic connection
Hydraulic line
Hydraulic connection
Pistons
40
Lower Bracket Switch F517
F517 is integrated in the hydraulic cylinder responsible for
movement of the tensioning strut and is located on the left
hand side of the vehicle. It is a Hall sensor and can be
replaced separately from the cylinder.
When the tensioning strut is in its lowest position (tensioned), the cylinder is fully extended. The Hall sensor then
sends a signal to Convertible Top Control Module J256 that
the tensioning strut is down.
623_080
Lower Bracket Switch F517
Convertible Top Compartment -open- Switch F407
F407 is integrated in the left hand side hydraulic cylinder
responsible for movement of the convertible top box lid.
It is a Hall sensor and can be replaced separately from
the cylinder.
When the convertible top box lid is fully opened, the Hall
sensor sends a signal to Convertible Top Control Module J256.
623_081
F407 is attached to the cylinder
41
Hydraulic cylinders at main bearings
The two hydraulic cylinders responsible for the movement
of the convertible top are mounted at the main bearings.
623_082
Hydraulic cylinder of main bearing , (left hand side)
Convertible Top Control Module J256
Convertible Top Control Module J256
J256 controls and monitors each individual convertible top
operating cycle. It collects the information generated by
the sensors as well as information from other data bus
users. It evaluates and controls the actuators accordingly
and it communicates over the Convenience CAN.
J256 is located on the left hand side of the luggage compartment behind the trim cover for Convertible Top Hydraulic
Pump V118.
623_083
J256 is also responsible for system diagnostics. If implausible signals are detected or received at the wrong time, the
convertible top cycle is stopped and a DTC is recorded. A
warning message to the driver is also displayed in the DIS.
Convertible top:
malfunction!
You can continue driving
623_084
42
To protect Convertible Top Hydraulic Pump V118 from
being overloaded, its run-time is monitored by J256.
If the top has been running continuously for approximately
2 minutes and is closed by this time, J256 suppresses
further operation of the top for approximately 10 minutes.
The maximum continuous operation of the hydraulic pump
is limited to approximately 170 seconds at which time the
pump shuts off regardless of the top’s current position.
Further operation of the pump is subsequently suppressed
for approximately 20 minutes to prevent it from overheating. The driver is warned by a message in the DIS.
Convertible top:
no operation
possible
623_085
Convertible Top Locking Motor V223
V223 is attached to the front of the convertible top in the
middle. The motor uses a linkage to operate the two catch
hooks which lock the roof to the window frame.
623_086
Catch hook
43
Convertible Top
Locking Motor V223
Linkage
Convertible Top Latch -closed- Switch F295
Convertible Top Latch -closed- Switch F295 is integrated
with Convertible Top Locking Motor V223. It is a Hall
sensor type switch.
When V223 has locked the convertible top latches, a retaining plate is within the detection range of F295. This produces a “locked closed” signal which is sent to Convertible
Top Control Module J256.
Convertible Top Latch
-closed- Switch F295
Retaining plate
623_087
Convertible Top Latch -open- Switch F294
F294 is also integrated with Convertible Top Locking Motor
V223. It is a Hall sensor configured as an incremental
encoder or rotary encoder. It measures the number of
revolutions of V223.
Convertible Top Control Module J256 evaluates the signals
generated by the Hall sensor. When the corresponding
number of revolutions have been registered, J256 detects
“convertible top lock open.”
Convertible Top Latch -open- Switch F294
623_088
44
Emergency operation
In the event of a malfunction, the convertible top can be
closed manually. If possible this should be done by two
people.
Closing the convertible top
The emergency procedure cannot be done unless the
hydraulic system has been de-pressurized. The system
de-pressurizes automatically approximately 5 minutes after
the ignition is switched off. It can also be de-pressurized by
pushing or pulling Convertible Top Operation Switch E137
for approximately 5 seconds after the ignition has been
switched off.
•
•
•
•
!
!
Conditions:
Parking brake applied
All side windows lowered
Ignition switched off
Hydraulic system de-pressurized
The wheel bolt wrench from the vehicle tool kit is required
for manual operation of the convertible top.
CAUTION
Be careful to prevent the top tensioning bow from striking the convertible top storage compartment cover if it is in the raised
position when depressurizing the hydraulic system.
CAUTION
To reduce the risk of injury or damage to the vehicle, do not reach into the convertible top linkage or other moving parts
during the emergency operating procedure.
First, the convertible top box lid must be unlocked. To do this:
•
Open the trunk and fold down the right seat by pulling
the lever in the direction of the arrow.
.
623_014
•
Remove the wheel bolt wrench from the vehicle tool kit
and close the trunk lid.
From inside the vehicle,
•
Pull down the release loop (arrow) and unlock the
convertible top box lid.
623_015
45
•
Push the covers on both sides of the vehicle in the
direction of the arrow until they engage.
623_016
To prevent the convertible top box lid from closing involuntarily and causing injury or damage,
•
Move the lid into the upright position (1) and hold it
there.
•
Push back the left and right knee hinges (arrow 2) until
they hold the top in its fully open position.
623_017
•
Remove the trim cover and insert the wheel bolt wrench.
To open or disengage the catch hooks,
•
Turn the box wrench clockwise as far as it will go and
then remove it.
623_018
•
Lift out the convertible top completely (in the direction
of the arrow) by grabbing it from the front edge.
•
Raise the convertible top tensioning strut until the
convertible top box lid can be closed.
623_019
46
Note:
Two people should always perform this procedure to avoid the
risk of injury or damage to the convertible top components.
•
Release the convertible top box lid (1) by pulling the
hinges forward and slowly lowering the lid until it
closes.
•
Lower the tensioning strut (2) until it rests on the
convertilbe top box lid.
623_020
•
Push the convertible top firmly into the windshield
frame (arrow).
623_021
•
Insert the wheel bolt wrench and turn it counter clockwise until the latch hooks are fully engage in the windshield frame.
•
Remove the wrench and stow it in the vehicle tool kit.
623_022
Reference
Please refer to the Owner’s Manual for further information on emergency operation.
47
Data bus overview
The overview shows the information exchanged via data bus.
Instrument Cluster Control Module J285
Display convertible top message in the DIS ← I
Ambient temperature → O
Driver Side Rear Window Regulator Motor Control
Module J1016
Front Passenger Side Rear Window Regulator Motor
Control Module J1017
Side window closing ← I
Lower side windows ← I
(LIN users of door control units J386 and J387)
Driver Door Control Module J386
Passenger Door Control Module J387
Locked and closed status of convertible top ← I
Side window closing ← I
Lower side windows ← I
Side window closing → O (to LIN users J1016 and J1017)
Side window opening → O (to LIN users J1016 and J1017)
Vehicle Electrical System Control Module J519 (= BCM_01)
Convertible Top Control Module J256
Locked and closed status of convertible top ← O
Unlocked status of convertible top ← O
Locked and open status of convertible top ← O
Convertible top in intermediate position ← O
Convertible top opening movement ← O
Convertible top closing movement ← O
Trunk lid release enabled/disabled ← O
Side window closing → O
Lower side windows ← O
Display convertible top message in the DIS → O
Comfort request via key ← O
Speed signal → I
Ambient temperature → I
Convenience opening and closing request signal → I
Sleep mode readiness → I
Rear window heater on/off status → I
NO contact on/off status → I
Terminal 15 status → I
Enable convertible top operation ← I
Trunk lid status → I
Actual and nominal status of external vehicle locking → I
Locked and closed status of convertible top ← I
Locked and open status of convertible top ← I
Convertible top in intermediate position ← I
Trunk lid release enabled/disabled ← I
Comfort request via key ← I
Rear window heater on/off status → O
NO contact on/off status → O
Terminal 15 status → O
Convenience opening and closing request signal → O
Enable convertible top operation → O
Actual and nominal status of external vehicle locking → O
Trunk lid status → O
Sleep mode readiness → O
Climatronic Control Module J255
Locked and closed status of convertible top ← I
Locked and open status of convertible top ← I
Convertible top opening movement ← I
Convertible top closing movement ← I
Data Bus On Board Diagnostic Interface J533 (Gateway)
Locked and closed status of convertible top ← I
Unlocked status of convertible top ← I
Locked and open status of convertible top ← I
Comfort request via key ← I
Speed signal → O
Sleep mode readiness → O
Access/Start Authorization Control Module J518
Locked and closed status of convertible top ← I
Convertible top opening movement ← I
Convertible top closing movement ← I
Comfort request via key ← I
Key:
Data bus in general
←I
→O
LIN bus
Trailer detector control unit J345
Receiving data (input)
Sending data (output)
Comfort request via key ← E
623_071
48
Occupant protection
The A3 Cabriolet has the following occupant protection equipment:
• Airbag Control Module
• Driver and passenger front airbags
• Front side airbags (head/thorax airbag)
• Knee airbags
• Front airbag crash sensors
• Side impact sensors in the front doors
• Centrally located rear side impact sensor
• Front inertia reel safety belts with electric and pyrotechnic tensioners
• Safety belt warning for all seats
• Front passenger seat occupancy detection sensor
• Rollover protection
623_005
Key for following page
E24
E25
E258
E259
Driver Seat Belt Switch
Front Passenger Seat Belt Switch
Driver Side Rear Seat Belt Switch
Passenger Side rear Seat Belt Switch
G452
G179
G180
G256
G283
G284
G551
G552
G553
G554
Front Passenger Seat Occupant Sensor
Driver Side Airbag Crash Sensor
Front Passenger Side Airbag Crash Sensor
Centrally located Rear Side Airbag Crash Sensor
Driver Front Airbag Crash Sensor
Passenger Side Front Airbag Crash Sensor
Driver Belt Force Limiter
Front Passenger Belt Force Limiter
Driver Seat Position Sensor
Passenger Seat Position Sensor
J234
J285
J533
J706
J854
J855
Airbag Control Module
Instrument Cluster Control Module
Data Bus On Board Diagnostic Interface
Passenger Occupant Detection System Control Module
Left Front Seat Belt Tensioner Control Module
Right Front Seat Belt Tensioner Control Module
K19
K75
K145
Seat Belt Indicator Lamp
Airbag Indicator Lamp
Front Passenger Airbag Disabled Indicator Lamp
N95
N131
N132
N153
N154
N199
N200
N295
N296
N297
N298
N646
N647
Driver Airbag Igniter
Front Passenger Airbag Igniter 1
Front Passenger Airbag Igniter 2
Driver Seat Belt Tensioner Igniter 1
Front Passenger Seat Belt Tensioner Igniter 1
Driver Thorax Airbag Igniter
Front Passenger Thorax Airbag Igniter
Driver Knee Airbag Igniter
Front Passenger Knee Airbag Igniter
Driver’s Seat Belt Tensioner Igniter 2
Front Passenger Seat Belt Igniter 2
Driver Side Rollover Protection Igniter
Front Passenger Side Rollover Protection Igniter
T16
Data Link Connector
Powertrain CAN bus
Convenience CAN bus
Diagnostics CAN bus
Input signal
Output signal
49
623_006a
50
Side airbag
The front driver and passenger side airbags are designed as
head thorax airbags. They are designed to protect the body
and head of the front occupant.
By integrating the side airbags in the front seat backrests,
the occupant is optimally positioned relative to the front
occupants irrespective of their seating adjustment.
623_011
The side airbags are activated by Airbag Control Module
J234. The signal first ignites the priming charge which in
turn ignites the solid propellant.
The gases expelled during the combustion of the propellant
charge flow through the outlet orifices via the filter into
the airbag which unfolds and fully inflates. The seal
between the outlet orifices protects the pyrotechnic material from moisture and is destroyed by the heat generated.
Seal
Filter
(contains the propellant charge)
Priming charge
623_012
Igniter
Propellant charge
Outlet orifices
51
Electrical wiring harness for side airbag
The electrical wiring harness for the front side airbags can
now be replaced without replacing the complete airbag
module if it is damaged.
This is because the ground wire used to protect the pyrotechnic devices from static connects directly to the airbag
module. When connected, the ground wire connects the
gas generator housing to the vehicle body.
Cover
Locking device
Contact
Mechanically encoded housing
609_014a
609_014
Driver Side Rear Side Airbag Crash Sensor G256
G256 is a capacitive acceleration sensor. Although it is
designated as being for the driver’s side rear, it is installed
at the center of the back seat area.
If a deployable impact is detected, the Airbag Control
Module deploys the safety belt tensioners.
If G256 senses a side impact, it sends its signal to Airbag
Control Module J234. The ‘Y’ sensor in the Airbag Control
Module performs a plausibility check.
Driver Side Rear Side Airbag
Crash Sensor G256
623_013
52
Rollover protection
The A3 Cabriolet is equipped with a rollover protection
system. Together with the strength of the body and rigid
A-pillars, a protective area is created for the occupants
during a rollover accident.
In all crash events in which the airbags and/or safety belt
tensioners are ignited, the rollover protection deploys as a
precautionary measure. If no rollover occurs in the course
of the event, the system can be reset.
An additional sensor detects an imminent rollover and
deploys the protection system. The sensor is located in
Airbag Control Module J234 and cannot be replaced
separately. If an imminent rollover is detected, the
protection system is deployed and the pyrotechnic safety
belt tensioners are ignited.
623_005a
53
Cassettes with protective roll bars
The rollover protection system on the A3 Cabriolet consists
of two cassettes that hold the protective roll bars and other
components. Different cassettes are used for the driver
and passenger side of the vehicle. The cassettes must be
installed on the correct side of the vehicle.
The correct installation direction of each cassette is indicated by a stamped arrow. A specific tightening sequence
must be followed when they are installed.
Arrow indicating
installation direction
Spring
Release lever
Cassette
Ratchet rail
Pawl
623_007
Driver Side Rollover Protection Igniter N646 and
Front Passenger Side Rollover Protection Igniter N647
The retractable protective roll bars are pre-loaded by a
spring. The bar is held in its lowered position by the U bar
of the rollover protection trigger. When the trigger is
energized by Airbag Control Module J234, it releases the
U bar and the bar deploys upward in approximately
130 milliseconds.
When the protective roll bar reaches its fully extended
position, a pawl engages the ratchet rail and locks the bar
in position.
U bar
Spring
623_008
Rollover protection trigger
Rollover protection trigger
54
When the convertible top is open, the protective roll bar
travels approximately 12.5 in (320 mm) when it is deployed.
When the convertible top is closed, the travel of the bar is
limited and it deploys approximately 7.4 in (190 mm). This
helps minimize damage to the convertible top.
Attaching points
Ratchet rail
Spring
Pawl
623_009
Preloaded position
55
Fully extended position when
convertible top is closed
Fully extended position when
convertible top is open
Resetting a deployed protective roll bar
Pulling the release lever 1 pulls the pawl 2 out of the
ratchet rail 3 and releases the bar.
The rollover protection system can be reset by pushing back
the bar 4 at the same time (the U bar must lock into place).
1
4
2
3
623_010
Diagnostics
N646 and N647 are monitored by Airbag Control Module
J234. The Airbag Control Module records each deployment
of the rollover protection system. The protection system
can be tested by deploying through an Output check diagnosis using the VAS Scan Tool.
The number of deployments is limited and can be read from
the MVBs. Once 127 deployments have been recorded, a
DTC (rollover protection system faulty) is registered by J234
and the cassettes have to be replaced.
Therefore, unnecessary deployments should be avoided.
Please consult the maintenance schedule to determine
when a check of the system should be performed.
Reference
For further information about the rollover protection system, refer to the Electronics Service Information,
Guided Fault Finding and the maintenance schedule.
56
Engines
1.8L and 2.0L TFSI engines
Technical feature overview
Cylinder head with Integrated Exhaust Manifold (IEM)
609_156_a
2.0L TFSI engine shown. The 1.8L TFSI engine
does not have continuously adjustable exhaust
camshaft timing.
Optimized thermal management
Engine Temperature Control Actuator
N493
609_156_b
57
Both the 1.8L TFSI and 2.0L TFSI engines for the North
American market will only have the FSI injection system.
The dual injection may be introduced at a later date.
Combined FSI/MPI injection
609_156_c
Friction optimization and lightweight design
609_156
609_156_d
Reference
For detailed information about the 1.8L and 2.0L TFSI engines, please see eSelf-Study Program 920243,
Third generation Audi 1.8L and 2.0L engines from the EA888 model family.
58
Engine/transmission combinations
1.8l TFSI engine
OD9 front
2.0l TFSI engine
0D9 quattro
59
Notes
60
Suspension
Overall concept
By using key suspension components from the 2015 A3
sedan, special emphasis was placed on lightweight design
as part of the Audi Ultra Strategy. Some suspension components are made from aluminum.
623_103
The front and rear axle carriers are connected to the car body by
additional cross pieces. This provides a high level of vehicle rigidity
and reduction of vibration.
623_104
61
Overview
Continental ESC MK100
second generation tire pressure
monitoring system
Three-spoke sports wheel in various
versions as options
17” wheels standard, 18” and 19”
optional on some models
15“ or 16” inch brakes
standard
623_105
15" rear wheel brakes with
electro-mechanical parking brake
(EPB)
Four-link rear axle for front
wheel drive and quattro drive
ACC is optional
MacPherson strut front axle in
combina­tion with aluminum sub
frame and steering knuckle.
Electro-mechanical steering
with Servotronic function as
standard
Tandem master brake cylinder with
single 10“ or 11“ brake servo
Reference
For detailed information about the design and function of the electro-mechanical steering system, refer to eSelf-Study
Program 960143, The 2015 Audi A3Running Gear and Suspension System.
62
Electrical system
Installation locations of control modules
Some of the control modules shown in the overview may
be optional or country specific and not available in the
North American market.
Refer to the current service literature for details of control
module positions, as well as instructions for installation
and removal.
J387
J668
J104
J250
J794
J500
R242
E380
J685
J428
J234
J587
J518
J745
J533
J285
J527
J525
J764
J623
J791
J667
J519
J386
Key:
E380 Multimedia System Control Head
J104
J234
J250
J255
J256
J285
J386
J387
63
ABS/ESP Control Module
Airbag Control Module
ECD Control Module (electronically controlled damping)
Climatronic Control Module
Convertible Top Operation Control Module
Instrument Cluster Control Module
Driver Door Control Module
Passenger Door Control Module
J428
J492
J500
J518
J519
J525
J527
J533
J527
Distance Regulation Control Module
All Wheel Drive Control Module
Power Steering Control Module
Access/Start Authorization Control Module
Vehicle Electrical System Control Module 1
Digital Sound System Control Module
Steering Column Electronics Control Module
Data Bus On Board Diagnostic Interface (Gateway)
Steering Column Electronics Control Module
J1017
J769
J772
J492
J770
J256
J1016
623_097
J623
J667
J668
J685
J745
J764
J769
J770
J772
Engine Control Module
Left Headlamp Power Output Stage
Right Headlamp Power Output Stage
Front Information Display Control Head
Cornering Lamp and Headlamp Range Control Module
Electronic Steering Column Lock Control Module
Lane Change Assistance Control Module
Lane Change Assistance Control Module 2
Rear View Camera System Control Module
J791 Parallel Parking Assistance Control Module
J794 Information Electronics Control Module 1
J1016 Rear Driver Side Window Control Module
J1017 Rear Passenger Side Window Control Module
R242 Driver Assistance Systems Front Camera
64
Topology
Light switch
E1
Left Headlamp
Power Output
Stage J667
Anti-theft Alarm
System Sensor
G578
Wiper Motor
Control Module
J400
Right Headlamp
Power Output
Stage J668
Alarm horn
H12
Rain/Light
Recognition Sensor
G397
or
Left Head Area
Heater Control
Module J846
Vehicle Electrical
System Control
Module J519
Right Head Area
Heater Control
Module J847
Instrument Cluster
Control Module
J285
Humidity sensor
G355
Power Output
Module for Left
LED Headlight
Power Output
Module for Right
LED Headlight
Convertible Top
Control Module
J256
Lane Change
Assistance Control
Module 2 J770
Steering Column
Electronics Control
Module J527
Data Link Connector
Rear Passenger Side
Window Control
Module J1016
Driver Door Control
Module J386
Rear Driver Side
Window Control
Module J1017
Passenger Door
Control Module
J387
Trailer detector
control unit
J345
Data Bus On Board Diagnostic Interface J533 (Gateway)
Nox Sensor Control
Module
J583*
Engine Control
Module
J623
Access/Start
Authorization
Control Module
J518
Nox Sensor Control
Module 2
J881*
Electronic Steering
Column Lock
Control Module
J764
Passenger Occupant
Detection System
Control Module
J706
Vehicle tracking
system interface
control unit
J843
Left Front Seat
Belt Tensioner
Control Module
J854
Special vehicle control unit
J608
Right Front Seat
Belt Tensioner
Control Module
J855
Climatronic Control
Module J255
Airbag
Control Module
J234
Transmission
Control Module
J217
Selector Lever
Sensor System
Control Module
J587
Refrigerant Circuit
Pressure Sensor
G805
65
*TDI engine only
Fresh Air Blower
Control Motor
J126
Humidity Sensor in
Fresh Air Intake
Duct
G657
Air quality sensor
G238
Structure-Borne
Sound Control
Module J869
The topology shows all control modules with connectivity
to the data bus system. Some of the control modules
shown here are optional or country-specific equipment, or
may be introduced at a later date.
Cornering Lamp and
Headlamp Range
Control Module
J745
or
For example: Cornering Light and Headlamp Range Control
Module J745 is never installed in combination with Headlamp Range Control Module J431; only one or the other is
installed.
Multimedia System
Control Head E380
Headlamp Range
Control Module
J431
Front Information
Display Control
Head J685
Lane Change
Assistance Control
Module J769
Driver Assistance
Systems Front
Camera
R242
or
Automatic High
Beam Assistance
Control Module
J844
Digital Sound System Control
Module J525
Lane Change
Assistance Control
Module J769
Information
Electronics Control
Module 1 J794
ABS/ESP Control
Module J104
Power Steering
Control Module
J500
All Wheel Drive
Control Module
J492
Parallel Parking
Assistance Control
Module J791
Battery Monitoring
Control Module
J367
Generator
C
R
Media Oriented Systems Transport
Rearview Camera
System Control
Module J772
Multifunction
Steering Wheel
Control Module
J453
Electronic Damping
Control Module
J250
623_098
Key:
Powertrain CAN bus
Infotainment CAN bus
LIN bus
Convenience CAN bus
Diagnostics CAN bus
Sub-bus systems
Extended CAN bus
Suspension CAN bus
MOST bus
"OR" configuration
66
Climatronic
The A3 Cabriolet will come with Climatronic dual-zone air
conditioning as standard equipment.
The Climatronic system has a moisture and enthalpy*
control system. The moisture control system is used to
detect windshield fogging.
A/C Compressor Regulator Valve N280
Climate Control Module J255
Right Head Area Heater
Control Module J847
623_096
Left Head Area Heater
Control Module J846
* Enthalpy is the heat content of a system at a constant pressure.
67
Left vent frame
Operation
Summary of main functions:
Climatronic
Control panel and control module
Climatronic Control Module J255 with display
Functions on the control panel
Two rotary controls for drive and passenger side vent temperature
AC button
AUTO button
Rotary blower control
Defroster button
Manual air recirculation button
Heated rear window button
Three buttons for setting the air distribution
Optional seat heater button, three-stage
Number of temperature zones
2
Air flow and air flow distribution in the occupant cell
Defroster vents
Dash panel vents, left-centre-right
Footwell vents, right/left
Rear footwell vents, right/left
Rear vents
Moisture and enthalpy control system
yes
Automatic aire recycle control
yes
Air quality sensor
yes
Sun sensor
yes
Interior moisture sensor
yes
Exterior moisture sensor
yes
Glove compartment cooling
no
68
Head area heating*
Head Area Heater Control Modules J846/J847
Head area heating is optional for the front seats of the A3
Cabriolet. Sport seats can also be ordered with head area
heating as an option.
Head area heating via the air vents on the upper edge of the
backrest provides warmth in the head, neck and shoulder
areas of the driver and front passenger.
PTC heating
element
Head area heating can be switched on when the engine is
running, even if the convertible top is open.
623_091
Fan
The front seats with head space heating have no air intakes.
The air required for head space heating is aspirated from
the entire seat.
To ensure that enough air flows to Head Area Heater
Control Modules J846 and J847, neither the seat fabric nor
the rear seat cover are hermetically sealed.
623_092
Head space heating
button, driver's seat
Climatronic Control Module J255
The head area heater system is switched on and off by
switches integrated in Climatronic Control Module J255
just above the seat heater switches.
Three settings can be selected. When the system is on, its
setting is indicated by LEDs.
The head area heater intensity level depends on the setting
selected and on the position of the convertible top. If the
convertible top is open, the heating output of the PTC
element and the air flow rate are increased in each setting.
*Head area heating not available for North America at launch.
69
623_093
Seat heater button,
driver's seat
The head area heating system has a maximum power
consumption of approximately 20A per front seat module.
Climatronic Control Module J255 receives input from the
heater switches and sends it to Vehicle Electrical System
Control Module J519 over the Convenience CAN. J519
transmits the activated head area heater setting and
convertible top open or closed position by LIN signal.
HSH button,
left
The Head Area Heater Control Modules then actuate the
corresponding blower setting and the heating output of the
PTC element.
Head Area Heater Control Modules J846 and J847 are
identical and are may be installed on either the left or
right seat by a pin coding assignment.
HSH button,
right
Convenience
CAN bus
LIN
623_094
J255
J519
J846
J847
SH1
SH2
Head space heating (HSH) button, left
Head space heating (HSH) button, right
Climatronic Control Module
Vehicle Electrical System Control Module
Left Head Area Heater Control Module
Right Head Area Heater Control Module
Fuse 1 on fuse holder H
Fuse 2 on fuse holder H
* PIN coding wire
LIN
Convenience CAN bus
70
Infotainment
In response to the speed at which the development cycles
for information and entertainment systems occur, the
automotive industry has had to shorten its development
cycles as well. Keeping up to date with the latest advances
is a growing challenge for car makers.
To meet this challenge, the Volkswagen Group has introduced the Modular Infotainment Platform (MIB).
Central to the development of the MIB, Information
Electronics Control Module 1 J794, has been re-designed
as a modular component. The control module architecture
allows the hardware to be easily and economically
updated so that it always incorporates the latest technological advances.
An important component is the graphics processor made by
market-leader Nvidia, with whom Audi enjoys a very successful business relationship. The latest Nvidia processors
will continue to be used in Audi vehicles in the future. The
new platform means that it will be possible to use the
same central processing units (J794) across the entire
Group. So, in the future it will be possible to run brand
specific variants on four standardized hardware platforms.
Overview of versions
In the North American market, the following versions of
the MIB will be available on the 2015 Audi A3:
•
•
Standard MIB - MMI radio
High-spec MIB
•
MMI navigation plus
•
MMI navigation plus with Audi connect
Click here for a closer look at the Audi
A3 sedan Modular Infotainment
System.
Reference
For more information about the infotainment systems of the 2015 A3, please see eSelf-Study Program 970143,
Modular Infotainment Platform (MIB).
71
Standard MIB - MMI radio
High spec MIB
MMI navigation plus
High spec MIB
MMI navigation plus with Audi connect
5.8“ TFT color monitor with
400 x 240 pixel resolution
7.0“ TFT color monitor with
800 x 480 pixel resolution
7.0“ TFT color monitor with
800 x 480 pixel resolution
2D navigation system
3D hard drive navigation system
MMI touch
AM/FM radio with phase diversity
AM/FM radio with phase diversity and TMC
tuner
AM/FM radio with phase diversity and background tuner
Car menu
Car menu
Car menu
CD drive (MP3, WMA, AAC1))
CD drive (MP3, WMA, AAC)
DVD drive (audio/video, MP3, AAC, WMA,
MPEG4)
1 SD card reader (SDHC cards with up to
32 GB of memory)
2 SD card readers (SDHC cards with up to
32 GB of memory)
2 SD card readers (SDHC cards with up to
32 GB of memory)
approximately 10 GB for jukebox
AUX (with AMI)
Audi music interface with iPod cable (UE7)
Audi music interface with iPod cable (UE7)
Audi Sound System (9VD)
Audi Sound System (9VD)
Audi Sound System (9VD)
Bluetooth interface for HFP and A2DP
(9ZX)
Bluetooth interface for HFP and A2DP
(9ZX)
Speech dialogue system
Premium speech dialogue system
1 sim card reader
Bluetooth interface for HFP and A2DP
(9ZX) and speech dialogue system
Optional
Audi music interface with iPod cable
(UE7)
Bluetooth car phone BTA (market-dependent,
Audi connect incl. car phone)
(9ZK)
SDARS HD radio
(QV3)
1)
SDARS HD radio
(QV3)
SDARS HD radio
(QV3)
Bang & Olufsen Sound System
(9VS)
Bang & Olufsen Sound System
(9VS)
The MMI Radio can only play back AAC files only if the optional Audi music interface is installed.
72
Optional Bang & Olufsen sound system
The speakers are driven through an external 13-channel
amplifier (Digital Sound System Control Module J525) with
a total power output of 625W.
Surround sound is provided by 13 high-performance speakers
including center speakers and, instead of a subwoofer, two
special Kickbass speakers (R17/R15) each delivering 100W.
R20
R208
R22
R23
R104
R17
R16
R21
R103
J525
R14
R105
R15
Key:
J525
R14
R15
R16
R17
R20
R21
R22
R23
R103
R104
R105
R106
R208
73
Digital Sound System Control Module
Left Rear Treble Speaker
Left Rear Bass Speaker
Right Rear Treble Speaker
Right Rear Bass Speaker
Left Front Treble Speaker
Left Front Bass Speaker
Right Front Treble Speaker
Right Front Bass Speaker
Left Front Mid-range Speaker
Right Front Mid-range Speaker
Left Mid-range Speaker
Right Mid-range Speaker
Center Speaker
R106
623_100
Notes
74
Antenna system
To ensure optimal AM reception when the convertible top is
open and closed, two antennas for AM reception are
installed on the A3 Cabriolet.
When the convertible top is closed, the signals from the
convertible top antenna and Antenna Amplifier R24 are
combined to give better reception.
The AM1 antenna is integrated in the right rear trim panel,
while AM2 R11 is built into the convertible top.
If the convertible top is open, only Antenna Amplifier R24
provides a signal.
R83 R56 R50
R55
R82
Key:
R11
R24
R50
R55
R56
R65
R78
R82
R83
R111
R112
R172
R183
R205
R248
R267
75
Antenna (AM2)
Antenna Amplifier (AM1)
GPS Antenna
TV Antenna 1 (not for the North American market
TV Antenna 2 (not for the North American market
Telephone Antenna
TV tuner (not for the North American market)
TV Antenna Amplifier 1 (not for the North American Market)
TV Antenna Amplifier 2 (not for the North American Market)
Antenna Amplifier 2
Antenna Amplifier 3
Satellite Tuner Antenna
Digital Radio Antenna
GSM Antenna
Radio Antenna
GSM Antenna 2
R183
R112
R11
R78
R111
R24
R248
623_102
R65
R172
R267
R205
623_101
76
Service
Service interval overview for North American region
Service recommendations can be viewed through the MMI.
• Oil change service
• Mileage based service events
• time based service events
Flexible service event
(ROW)
Mileage based service event
Time based service event
625_073a
vic
e
nge
Oil
cha
ns
tio
Ins
pec
ser
er v
vic
Oil
cha
nge
ser
ser
ion
Ins
pec
t
ice
e
ea
vic
vic
e
ser
Oil
cha
nge
and
nd
o
oil
il c
cha
han
ge
nge
The first recommended oil change for A3 Cabriolets in the
North American region is at 5000 mi (8000 km) or at one
year from the date of delivery. An oil change and inspection service is recommended at 15,000 mi (24,000 km) Oil
change service is recommended 10,000 mi (16,000 km)
thereafter with. See the chart below.
5000 mi (8000 km)
1 year
15,000 mi (24,000 km)
2 years
25,000 mi (40,000 km)
3 years
35,000 mi (56,000 km)
4 years
45,000 mi (72,000 km)
625_080
77
Self Study Program
eSelf-Study Program 920243
The Audi 1.8L and 2.0L Third Generation
EA888 Engines
1
SSP 970343
The 2015 Audi A3 Vehicle
Electronics and Drivers Assistance
Systems
SSP 920243
Audi 1.8L and 2.0L Third
Generation EA888 Engines
eSelf Study Program 960143
The 2015 Audi A3
Running Gear and Suspension System
SSP 970143
Modular Infotainment Platform
(MIB)
SSP 960143
The 2015 Audi A3 Running Gear
and Suspension Systems
SSP 970243
The 2015 Audi A3 Onboard Power
Supply and Networking Systems
SSP 920143
The Audi 2.0L Third Generation
TDI Engine
78
79
Knowledge Assessment
An On-Line Knowledge Assessment (exam) is Available for this eSelf-Study Program.
The Knowledge Assessment is required for Certification.
You can find this Knowledge Assessment at:
www.accessaudi.com
From the accessaudi.com Homepage:
•
Click on the “ACADEMY” tab
•
Click on the “Academy site” link
•
Click on the Course Catalog Search and select “960243b - 2015 A3 Cabriolet”
Please submit any questions or inquiries via the Academy CRC Online Support Form
which is located under the “Support” tab or the “Contact Us” tab of the Academy CRC.
Thank you for reading this eSelf-Study Program and taking the assessment.
80
960243
All rights reserved.
Technical specifications are
subject to change without notice.
Audi of America, LLC
2200 Ferdinand Porsche Drive
Herndon, VA 20171
81