belt AUDI A4 1999 B5 / 1.G Airbag Service OBD Workshop Manual

01-5


Airbag system (with and
without side airbag) On Board
Diagnostic (OBD)

General Information


Vehicles 1997
The airbag system includes a driver-side airbag,
passenger-side airbag, and two front seat belt
tensioners. These are ignited centrally by the
airbag control module -J234- if the specified
activation criteria are met during a crash.

Vehicles 1997 1999 : up to VIN 8D XA 200
000 The airbag system includes a driver-side airbag,
passenger-side airbag, two front seat belt
tensioners, side airbag, driver's side, side airbag,
passenger side, and two or three (1998 and on )
rear seat belt tensioners. If the specified
activation criteria are met during a crash, they
are ignited centrally by the airbag control module
-J234-.
Regardless of the type of crash or crash
intensity, the airbag control module sends a
"crash signal" to the central locking control
module. This function provides passive security.
With the help of the central locking system, it
unlocks the doors, opens the rear lid and blocks
Pa
ge 1 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-6

1999 vehicles : from VIN 8D XA 200 001 Airbag system includes: side airbag, passenger-
side airbag, two front seat belt tensioners, two
front side airbags, two or three rear seat belt
tensioners and side curtain airbags. In a crash
situation, these are ignited centrally by the airbag
control module -J234- when specified triggering
criteria are met.
In a crash situation, the control module sends a
crash signal to the central locking control
module. This function is a passive safety feature.
It releases door locks and the rear lid lock via the
central locking system if an airbag and/or belt
tensioner is triggered. Also, inside door lock
switches are blocked and interior lighting is
switched on. The "crash signal" can be checked
using output Diagnostic Test Mode (DTM)
page 01
-44
.
When the airbags and/or belt tensioners are
deployed, the control module will record the DTC
"Crash data stored."
Airbag control module -J234- must be replaced
following:

The 1st driver-side/passenger-side airbag
deployment.
The 3rd time front seat belt tensioners and/or
Pa
ge 3 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-18

V.A.G 1551 print-out
Possible malfunction cause
Corrective action
00589
Igniter 1 for airbag (passenger's
side) -N131
Short to Ground
Wiring damagedFront passenger's airbag
unit faulty Airbag control unit -J234
faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair per wiring diagram
- Replace front passenger's airbag unit
- Replace airbag control unit -J234
00591
Left Seat Belt Switch -E24
Implausible switch condition
Left belt lock switch faulty- Replace left belt lock switch
00591
Left Seat Belt Switch -E24
Short circuit to positive Wiring damaged
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Check and repair wiring harness
- Repair per wiring diagram
00591
Left Seat Belt Switch -E24
Short circuit to Ground
Wiring damaged
Electrical Wiring Diagrams, Troubleshooting & - Check and repair wiring harness
- Repair per wiring diagram
Pa
ge 20 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-19

V.A.G 1551 print-out
Possible malfunction
cause Corrective action
00592
Right Seat Belt Switch -
E25
Implausible switch
condition
Right belt lock switch
faulty - Replace right belt lock switch
00592
Right Seat Belt Switch -
E25
Short circuit to positive Wiring damaged
Electrical Wiring Diagrams, Troubleshooting & Component
Locations binder - Check and repair wiring harness
- Repair per wiring diagram
00592
Right Seat Belt Switch -
E25
Short circuit to Ground
Wiring damaged
Electrical Wiring Diagrams, Troubleshooting & Component
Locations binder - Check and repair wiring harness
- Repair per wiring diagram
Pa
ge 22 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-20

DTC


VAG 1551 scan tool
display Possible cause
Corrective action
00594
Airbag Ignition
Circuit
Short circuit to B+
Wiring damaged
Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting & Component
Locations binder - Repair wiring according to wiring diagram.
- Replace airbag control module -J234-.
00594
Airbag Ignition
Circuit
Short circuit to
Ground
Wiring damaged
Spiral spring faulty
Driver-side airbag faulty
Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting & Component
Locations binder - Repair wiring according to wiring diagram.
- Check spiral spring.
- Replace driver-side airbag unit.
- Replace airbag control module -J234-.
00595
Crash Data Stored

Frontal collision
Side collision- Replace airbag control module, airbag units, seat belt tensioners
and if necessary, faulty components.
Pa
ge 23 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-21

DTC


VAG 1551 scan tool
display Possible cause
Corrective action
00654
Seat Belt Tensioner
Igniter,L-N153
Resistance value too
large
Open circuit in wiring
Harness connector for left seat belt
tensioner igniter disconnected
Seat belt tensioner igniter faulty
Airbag control module -J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Reconnect harness connector.
- Replace left seat belt tensioner.
- Replace airbag control module -J234-.
00654
Seat Belt Tensioner
Igniter,L-N153
Resistance value too
small
Short circuit in wiring
Left seat belt tensioner igniter faulty
Airbag control module -J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace left seat belt tensioner.
- Replace airbag control module -J234-.
00654
Seat Belt Tensioner
Igniter,L-N153
Wiring damaged
Airbag control module -J234- faulty
Electrical Wiring Diagrams, Troubleshooting & - Repair wiring according to wiring diagram.
Pa
ge 24 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-22

DTC


VAG 1551 scan tool
display Possible cause
Corrective action
00654
Seat Belt Tensioner
Igniter,L-N153
Short circuit to Ground
Wiring damaged
Left seat belt tensioner igniter faulty
Airbag control module -J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace left seat belt tensioner.
- Replace airbag control module -J234-.
00655
Seat Belt Tensioner
Igniter,R-N154
Resistance value too
large
Open circuit in wiring
Harness connector for right seat belt
tensioner igniter disconnected
Seat belt tensioner igniter faulty
Airbag control module -J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Reconnect harness connector.
- Replace right seat belt tensioner.
- Replace airbag control module -J234-.
Pa
ge 26 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-23

DTC


VAG 1551 scan tool
display Possible cause
Corrective action
00655
Seat Belt Tensioner
Igniter,R-N154
Resistance value too small
Short circuit in wiring
Right seat belt tensioner
igniter faulty
Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace right seat belt tensioner.
- Replace airbag control module -J234-.
00655
Seat Belt Tensioner
Igniter,R-N154
Short circuit to B+
Wiring damaged
Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace airbag control module -J234-.
00655
Seat Belt Tensioner
Igniter,R-N154
Short circuit to Ground
Wiring damaged
Right seat belt tensioner
igniter faulty
Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace right seat belt tensioner.
Pa
ge 27 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-27
Vehicles 1997 : DTC


VAG 1551 scan tool display
Possible cause
Corrective action
01211
Igniter for Belt Tens., Rr., Driver-N196
(sensor for lateral acceleration)
Resistance value too large
Wiring damagedSeat belt tensioner
igniter -N196- faulty Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace seat belt tensioner igniter -N196-.
- Replace airbag control module -J234-.
01211
Igniter for Belt Tens., Rr., Driver-N196
Resistance value too small
Wiring damagedSeat belt tensioner
igniter -N196- faulty Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace seat belt tensioner igniter -N196-
- Replace airbag control module -J234-.
Pa
ge 32 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-28

DTC


VAG 1551 scan tool
display Possible cause
Corrective action
01211
Igniter for Belt Tens., Rr.,
Driver-N196
Short circuit to B+
Wiring damaged
Airbag control module -J234-
faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace airbag control module -J234-.
01211
Igniter for Belt Tens., Rr.,
Driver-N196
Short circuit to Ground
Wiring damaged
Seat belt tensioner igniter -
N196- faulty
Airbag control module -J234-
faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace seat belt tensioner igniter -N196-.
- Replace airbag control module -J234-.
01211
Igniter for Belt Tens., Rr.,
Driver-N196
Open circuit
Wiring damaged
Seat belt tensioner igniter -
N196- faulty
Airbag control module -J234-
faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace seat belt tensioner igniter -N196-.
Pa
ge 33 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
(OBD
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2