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

01-8

Airbag system On Board Diagnostic
(OBD), initiating


Requirements

Power supply and fuses for relevant system
OK

Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder

VAG1551 Scan Tool (ST) connected page 01
-1

Ignition switched on

Notes:
Malfunctions which have only occurred briefly
are classified as "Sporadic malfunctions" and
are identified by the "/SP" on the right side of
the display.
To eliminate these sporadic malfunctions, erase
DTC memory before starting repair work.
Additional operating instructions can be
Pa
ge 7 of 74 Airba
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(with and without side airba
g)
On Board Dia
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)
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

01-9

Rapid data transfer
HELP
Insert address word XX

Indicated on display
Address word for the airbag system: 15
- Press buttons -1- and -5- to insert "Airbag" address word 15.
Rapid data transfer
Q
15 - Airba
g

Indicated on display
- Press -Q- button to confirm input.
Rapid data transfer Scan Tool sends address word 15

Indicated on display
Vehicles 1997:
8A0959655D
Airbag V AUDI
D02
Coding 00766
WSC 06812

Indicated on display after about 5 seconds
Vehicles 1997 up to 1999: VIN 8DXA 200 000
8D0959655C
Airbag 7
AUDI D00
Codin
g 00102
WSC 06812

Vehicles 1999 : from VIN 8D XA 200 001 - Indicated on display after approx. 5 seconds
8D0959655J
Airbag Front+Side
0004
Coding 01106
WSC 06812

- Indicated on display after approx. 5 seconds:
Front and side airbag or front and side curtain airbag
Pa
ge 9 of 74 Airba
g system
(with and without side airba
g)
On Board Dia
gnostic
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)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-10

All vehicles

-
Press button to advance through program
sequence. Rapid data transfer
HELP
Select function XX

Indicated on display
Note:
A list of available functions is printed out when the HELP button is
pressed.
On Board Diagnostic (OBD) functions
The following functions are possible:
01 - Check Control Module Versions page 01
-41

02 - Check DTC Memory page 01
-11

03 - Output Diagnostic Test Mode (vehicles 1997 1998 only page
01
-44
) (vehicles 1999 only page 01
-46
)
05 - Erase DTC Memory page 01
-137

06 - End Output page 01
-139

07 - Code Control Module page 01
-51

08 - Read Measuring Value Block page 01
-57

Note:
Pa
ge 10 of 74 Airba
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g)
On Board Dia
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)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.BD04.01.2

01-11

Check DTC Memory (scan tool function
02)


Note:
The DTC display information is updated only
when initiating the On Board Diagnostic (OBD) or
"Erase DTC Memory" function 05.

- Switch printer on by pressing PRINT button
(indicator lamp in button lights up).

Carrying out "Check DTC Memory" function
02
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -2- to select "Check DTC Memory" function 02.
Rapid data transfer
Q
02 - Check DTC Memor
y

Indicated on display
- Press -Q- button to confirm input.
X DTC recognized

Indicated on display (number of stored Diagnostic Trouble Codes, DTCs).
or:
No DTC recognized

If the message "No DTC recognized" is displayed, the program can be
returned to the starting point by pressing the button.
Pa
ge 12 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

01-12

Rapid data transfer
HELP
Select function XX

Indicated on display
If something else is displayed:
Scan tool operating instructions - Erase DTC Memory (function 05) page 01
-137
.
- End Output (function 06) page 01
-139
.
- Disconnect VAG1551 Scan Tool (ST) from Data Link Connector (DLC).
Pa
ge 13 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

01-13
Diagnostic Trouble Code (DTC) table, airbag system

Notes:

In the following table, all the possible malfunctions that can be recognized by the airbag control module -J234- are listed
according to their DTC code numbers. Existing malfunctions will be printed with their 5-digit DTC only if the VAG1551
printer is switched on.
If a malfunction occurs persistently, the airbag Malfunction Indicator Lamp (MIL) -K75- will light up and remain lit until the
malfunction is repaired and the DTC memory has been erased.
If a malfunction occurs only occasionally or if the DTC memory is not erased after a malfunction is repaired, the
malfunction will be displayed as a sporadic malfunction. Such malfunctions are identified by the letters "/SP" to the right on
the VAG1551 display and will cause -K75- to light up continuously.
Before replacing a component shown as malfunctioning, check the wiring to the component for short or open circuit
according to the wiring diagram.
The three digit malfunction type number appearing next to the DTC is a data code which can be disregarded.
Pa
ge 14 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

01-14

DTC


VAG 1551 scan tool
display Possible cause
Corrective action
00532
Supply voltage B+
Supply voltage too low
Battery discharged or faulty
Short circuit in vehicle
electrical system - Recharge or replace battery.
- Repair short circuit in vehicle electrical system.
00588
Airbag Igniter-Driver
Side-N95
Resistance value too
large Open circuit in wiring
Spiral spring faulty
Driver-side airbag unit 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-.
00588
Airbag Igniter-Driver
Side-N95
Resistance value too
small
Short circuit in wiring
Spiral spring faulty
Driver-side airbag unit faulty
Airbag control module -J234-
faulty Electrical Wiring Diagrams, Troubleshooting & Component
Locations binder - Repair wiring according to wiring diagram.
- Check spiral spring.
Pa
ge 15 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

01-15

DTC


VAG 1551 scan tool display
Possible cause
Corrective action
00588
Drivers side airbag igniter -N95-
Short circuit to B+
Wire damagedAirbag control module -J234-
malfunctioning
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram
- Replace airbag control module -J234-
00588
Drivers side airbag igniter -N95-
Short circuit to Ground
Wire damagedDriver-side airbag unit
malfunctioning Airbag control module -J234-
malfunctioning
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram
- Replace driver-side airbag unit
- Replace airbag control module -J234-
Pa
ge 17 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

01-16

DTC


VAG 1551 scan tool
display Possible cause
Corrective action
00589
Airbag Igniter 1-Passenger
Side-N131
Resistance value too large

Open circuit in wiringPassenger-side airbag unit
faulty Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace passenger-side airbag unit.
- Replace airbag control module -J234-.
00589
Airbag Igniter 1-Passenger
Side-N131
Resistance value too small
Short circuit in wiringPassenger-side airbag unit
faulty Airbag control module -
J234- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram.
- Replace passenger-side airbag unit.
- Replace airbag control module -J234-.
Pa
ge 18 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

01-17

DTC


VAG 1551 scan tool display
Possible cause
Corrective action
00589
Passengers side airbag igniter 1 -
N131- Short circuit to B+
Wire damagedAirbag control module -J234-
malfunctioning Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram
- Replace airbag control module -J234-
00589
Passengers side airbag igniter 1 -
N131- Short circuit to Ground
Wire damagedPassenger-side airbag unit
malfunctioning Airbag control module -J234-
malfunctioning Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder - Repair wiring according to wiring diagram
- Replace passenger-side airbag unit
- Replace airbag control module -J234-
Pa
ge 19 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