AUTOMOTIVE ELECTRICIANS
WIRING-DIAGRAMS

AUDI A4 2002 – Airbags for driver and front passenger with belt tensioners and side airbags . Wiring diagrams, Pin Connector, Location

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Wiring Diagram AUDI A4 2002 - Airbags on driver’s and front passenger’s side - belt tensioners - igniters



Wiring Diagram AUDI A4 2002 - Airbags on driver’s and front passenger’s side - belt tensioners - igniters
DIgnition/starter switch
F138Airbag coil connector, return spring with slip ring
J234Airbag control unit
N95Airbag igniter, driver's side
N131Airbag igniter 1, front passenger's side
N153Belt tensioner igniter -1-, driver's side
N154Belt tensioner igniter -2-, front passenger's side
T2a2-pin connector, yellow-blue, vehicle interior, on driver's seat
T2b2-pin connector, yellow-blue, vehicle interior, on front passenger's seat
T4e4-pin connector, yellow, on steering column electronics control unit
T4f4-pin connector, yellow, vehicle interior, near glove box
   109 Earth connection, in airbag wiring harness
   312 Earth connection -2-, in airbag wiring harness
   637 Earth point, airbag control unit
   A2 Positive (+) connection (15), in dash panel wiring harness
Short circuit bridge becomes effective when connector is unplugged.

Wiring Diagram AUDI A4 2002 - Curtain airbags (driver’s and front passenger’s side) - igniters



Wiring Diagram AUDI A4 2002 - Curtain airbags (driver’s and front passenger’s side) - igniters
J234Airbag control unit
N251Curtain airbag igniter, driver's side
N252Curtain airbag igniter, front passenger's side
T2l2-pin connector, yellow-blue, connector point, vehicle interior, headliner, front left
T2m2-pin connector, yellow-blue, connector point, vehicle interior, headliner, front right
T4g4-pin connector, yellow, connector point, vehicle interior, headliner, front left
T4h4-pin connector, yellow, connector point, vehicle interior, headliner, front right
   249 Earth connection -2-, in interior wiring harness
   277 Earth connection -3-, in interior wiring harness
*Only models with curtain airbags (saloons)
**Only models with curtain airbags (Avant)
Short circuit bridge becomes effective when connector is unplugged.

Wiring Diagram AUDI A4 2002 - Airbag deactivation on front passenger’s side



Wiring Diagram AUDI A4 2002 - Airbag deactivation on front passenger’s side
E26Glove box light switch
E224Airbag disabling key switch, front passenger's side
J234Airbag control unit
J393Convenience system central control unit
K145Airbag disabled warning lamp, front passenger's side
T12d12-pin connector, brown, glove box
T12h12-pin connector, black, on convenience system central control unit
T17f17-pin connector, orange, connector point, A pillar, left
WInterior light, front
W6Glove box light
   109 Earth connection, in airbag wiring harness
   238 Earth connection -1-, in interior wiring harness
   B250 Positive (+) connection, in roof wiring harness
*Only applies to models with airbag disabling key switch
#Phased-in modification

Wiring Diagram AUDI A4 2002 - Side airbags (driver’s and front passenger’s side) - igniters



Wiring Diagram AUDI A4 2002 - Side airbags (driver’s and front passenger’s side) - igniters
J234Airbag control unit
J393Convenience system central control unit
J526Telephone, telematics control unit
N199Side airbag igniter, driver's side
N200Side airbag igniter, front passenger's side
T3c3-pin connector, yellow, vehicle interior, near driver's seat
T3d3-pin connector, yellow, vehicle interior, near front passenger's seat
T12i12-pin connector, black, on convenience system central control unit (used to be connector 3)
T17d17-pin connector, red, connector point, electronics box, plenum chamber
   312 Earth connection 2, in airbag wiring harness
   A125 Connection (crash signal), in dash panel wiring harness
*⇒ Applicable engine Current Flow Diagram
**Applies to models with seat adjustment ⇒ applicable Current Flow Diagram
***⇒ Applicable Current Flow Diagram: Telematics
Short circuit bridge becomes effective when connector is unplugged.

Wiring Diagram AUDI A4 2002 - Rear side airbags (driver’s and front passenger’s side) - igniters - side airbag crash sensors



Wiring Diagram AUDI A4 2002 - Rear side airbags (driver’s and front passenger’s side) - igniters - side airbag crash sensors
G179Side airbag crash sensor, driver's side
G180Side airbag crash sensor, front passenger's side
G256Rear side airbag crash sensor, driver's side
G257Rear side airbag crash sensor, front passenger's side
J234Airbag control unit
N201Rear side airbag igniter, driver's side
N202Rear side airbag igniter, front passenger's side
T4i4-pin connector, yellow, connector point: vehicle interior, rear left
T4j4-pin connector, yellow, connector point: vehicle interior, rear right
   109 Earth connection, in airbag wiring harness
   312 Earth connection -2-, in airbag wiring harness
Short circuit bridge becomes effective when connector is unplugged.

Wiring Diagram AUDI A4 2002 - Belt switches - rear belt tensioners



Wiring Diagram AUDI A4 2002 - Belt switches - rear belt tensioners
E24Belt switch, driver's side
E25Belt switch, front passenger's side
F140Front left belt switch
F141Front right belt switch
J234Airbag control unit
N196Rear belt tensioner igniter, driver's side
N197Rear belt tensioner igniter, front passenger's side
N198Rear belt tensioner igniter, centre
T8b8-pin connector, black, belt switch, driver's side
T8c8-pin connector, black, belt switch, front passenger's side
   109 Earth connection in airbag wiring harness
   277 Earth connection 3, in interior wiring harness
*Only applies to models with belt switches
**Only applies to models with rear belt tensioners
***Only applies to models with seat belt warning

Wiring Diagram AUDI A4 2002 - Front airbag crash sensors for driver’s and front passenger’s side - control unit with display in dash panel insert



Wiring Diagram AUDI A4 2002 - Front airbag crash sensors for driver’s and front passenger’s side - control unit with display in dash panel insert
G283Front airbag crash sensor, driver's side
G284Front airbag crash sensor, front passenger's side
J234Airbag control unit
J285Control unit with display in dash panel insert
K75Airbag warning lamp
T1616-pin connector, black, diagnostic connector
T17a17-pin connector, red, connector point, A pillar, left
T17c17-pin connector, red, connector point, A pillar, right
T32a32-pin connector, green, on dash panel insert
   109 Earth connection, in airbag wiring harness
   A76 Connection (diagnosis wire K), in dash panel wiring harness
   A121 Connection (high bus), in dash panel wiring harness
   A122 Connection (low bus), in dash panel wiring harness
•Data bus wire (CAN bus)


AUDI A4 2002 Control units overview

Control units overview
   
AUDI A4 2002 Control units overview
1 -  Heated windscreen control unit -J505-
q   Location → page 804/4
2 -  CD changer -R41-
q   Location → page 804/13
3 -  Fresh air blower control unit -J126-
q   Location ⇒ page → 804/7
4 -  Headlight range control, control unit -J431-
q   Location → page 804/7
5 -  Radio -R-
q   not for navigation system
q   Location → page 804/11
5 -  Navigation operating electronics control unit -J402-
q   for navigation system RNS-D only
q   Location → page 804/11
5 -  Control unit with display for radio and navigation system -J503-
q   for navigation system RNS-Low only
q   Location → page 804/13

   

Audi A4 Fitting Locations No.  804 / 2
   
AUDI A4 2002 Control units overview
5 -  Navigation system with CD drive control unit -J401-
q   Location for navigation system NS-Low → page 804/12
q   Location for navigation system RNS-E → page 804/12
6 -  Telephone and telematics control unit, telematics -J526-
q   Location → page 804/14
6 -  Language input control unit -J507-
q   Location → page 804/14
7 -  Steering column electronics control unit -J527-
q   Location → page 804/8
8 -  Front passenger side door control unit -J387-
q   Location → page 804/16
9 -  Display control unit in dash panel insert -J285-
q   Location → page 804/8
10 -  Airbag control unit -J234-
q   Location → page 804/9
11 -  Driver door control unit -J386-
q   Location → page 804/16

   

Audi A4 Fitting Locations No.  804 / 3
   
AUDI A4 2002 Control units overview
12 -  Convenience system central control unit -J393-
q   Location → page 804/15
13 -  Onboard power supply control unit -J519-
q   Location → page 804/9
14 -  Motronic control unit -J220-
14 -  Diesel direct injection system control unit -J248-
14 -  Simos control unit -J361-
q   Location → page 804/4
15 -  Automatic gearbox control unit -J217-
q   not for models with multitronic®
q   Location → page 804/5
16 -  ABS control unit -J104-
q   Location → page 804/6
17 -  Automatic gearbox control unit -J217-
q   for models with multitronic® only
q   Location → page 804/5
18 -  Radiator fan control unit -J293-
q   Location → page 804/6

   

Audi A4 Fitting Locations No.  804 / 4
Heated windscreen control unit -J505-
   
Location:
On right in plenum chamber, next to battery


AUDI A4 2002 Motronic control unit -J220-, diesel direct injection system control unit -J248-, Simos control unit -J361-

Motronic control unit -J220-, diesel direct injection system control unit -J248-, Simos control unit -J361-
 
AUDI A4 2002 Motronic control unit -J220-, diesel direct injection system control unit -J248-, Simos control unit -J361-
Location:
On electronics box in plenum chamber
 
AUDI A4 2002 Motronic control unit -J220-, diesel direct injection system control unit -J248-, Simos control unit -J361-

Audi A4 Fitting Locations No.  804 / 5
   


AUDI A4 2002 Automatic gearbox control unit -J217-

Automatic gearbox control unit -J217-
not for models with multitronic®
Location:
 
AUDI A4 2002 Automatic gearbox control unit -J217-
In electronics box in plenum chamber
for models with multitronic® only
Location:
In gearbox
 
AUDI A4 2002 Automatic gearbox control unit -J217-

Audi A4 Fitting Locations No.  804 / 6


AUDI A4 2002 ABS control unit -J104-

ABS control unit -J104-
   
Location:
In engine compartment, on front left hydraulic unit


AUDI A4 2002 Radiator fan control unit -J293-

Radiator fan control unit -J293-
 
AUDI A4 2002 Radiator fan control unit -J293-
Location:
on radiator fan
 
AUDI A4 2002 Radiator fan control unit -J293-

Audi A4 Fitting Locations No.  804 / 7


AUDI A4 2002 Fresh air blower control unit -J126-

Fresh air blower control unit -J126-
   
Location:
Behind the glove box, in fresh air blower


AUDI A4 2002 Headlight range control, control unit -J431-

Headlight range control, control unit -J431-
 
AUDI A4 2002 Headlight range control, control unit -J431-
Location:
Behind the glove box
 
AUDI A4 2002 Headlight range control, control unit -J431-

Audi A4 Fitting Locations No.  804 / 8


AUDI A4 2002 Steering column electronics control unit -J527-

Steering column electronics control unit -J527-
   
Location:
On steering column


AUDI A4 2002 Display control unit in dash panel insert -J285-

Display control unit in dash panel insert -J285-
 
AUDI A4 2002 Display control unit in dash panel insert -J285-
Location:
In the dash panel behind the display unit
 
AUDI A4 2002 Display control unit in dash panel insert -J285-

Audi A4 Fitting Locations No.  804 / 9


AUDI A4 2002 Airbag control unit -J234-

Airbag control unit -J234-
   
Location:
On centre tunnel, under handbrake lever


AUDI A4 2002 Onboard power supply control unit -J519-

Onboard power supply control unit -J519-
 
AUDI A4 2002 Onboard power supply control unit -J519-
Location:
Behind driver's storage compartment
 
AUDI A4 2002 Onboard power supply control unit -J519-

Audi A4 Fitting Locations No.  804 / 10


AUDI A4 2002 Trailer detector control unit -J345-

Trailer detector control unit -J345-
   
Location:
In left luggage compartment, behind side trim


AUDI A4 2002 Parking aid control unit -J446-

Parking aid control unit -J446-
 
AUDI A4 2002 Parking aid control unit -J446-
Location:
In left luggage compartment, behind side trim, on apron
 
AUDI A4 2002 Parking aid control unit -J446-

Audi A4 Fitting Locations No.  804 / 11
   


AUDI A4 2002 Navigation operating electronics control unit -J402-

Navigation operating electronics control unit -J402-
for navigation system RNS-D only
Location:
in centre console
 
AUDI A4 2002 Navigation operating electronics control unit -J402-


AUDI A4 2002 Radio -R-

Radio -R-
not for navigation system
Location:
in centre console
 
AUDI A4 2002 Radio -R-

Audi A4 Fitting Locations No.  804 / 12
   


AUDI A4 2002 Navigation system with CD drive control unit -J401-

Navigation system with CD drive control unit -J401-
For navigation system NS-Low only
Location:
 
AUDI A4 2002 Navigation system with CD drive control unit -J401-
in centre console
For navigation system RNS-E only
Location:
in centre console
 
AUDI A4 2002 Navigation system with CD drive control unit -J401-

Audi A4 Fitting Locations No.  804 / 13
   


AUDI A4 2002 Control unit with display for radio and navigation system -J503-

Control unit with display for radio and navigation system -J503-
for navigation system RNS-Low only
Location:
in centre console


AUDI A4 2002 CD changer -R41-

CD changer -R41-
 
AUDI A4 2002 CD changer -R41-
Location:
In glove compartment
 
AUDI A4 2002 CD changer -R41-

Audi A4 Fitting Locations No.  804 / 14
   


AUDI A4 2002 Telephone and telematics control unit, telematics -J526-

Telephone and telematics control unit, telematics -J526-
For models with telematics only
Location:
in electronics box under front passenger seat
 
AUDI A4 2002 Telephone and telematics control unit, telematics -J526-


AUDI A4 2002 Language input control unit -J507-

Language input control unit -J507-
For models with telematics only
Location:
in electronics box under front passenger seat
 
AUDI A4 2002 Language input control unit -J507-

Audi A4 Fitting Locations No.  804 / 15


AUDI A4 2002 Convenience system central control unit -J393-

Convenience system central control unit -J393-
   
Location:
on sill, front left
 
AUDI A4 2002 Convenience system central control unit -J393-

Audi A4 Fitting Locations No.  804 / 16


AUDI A4 2002 Driver door control unit -J386-

Driver door control unit -J386-
   
Location:
In window regulator motor integrated


AUDI A4 2002 Front passenger side door control unit -J387-

Front passenger side door control unit -J387-
 
AUDI A4 2002 Front passenger side door control unit -J387-
Location:
In window regulator motor integrated
 
AUDI A4 2002 Front passenger side door control unit -J387-
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