1999 AUDI A8 ignition

01-35

To reduce the risk of personal injury and/or
damage of electric and electronic
components, always observe the following:

Always switch the ignition off before connecting
or disconnecting testers or measurement tools.
It is possible that the control module will
recognize a malfunction and store a DTC during
some tests. After completing all tests and
repairs, check DTC memory and erase the
memory.
Always switch ignition off before disconnecting
and connecting the battery to avoid damaging
the transmission control module.
Pa
ge 2 of 10 On Board Dia
gnostic
(OBD
), initiatin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.AT02.01.3

01-37

- Switch ignition off.

For vehicles up to m. y. 2000

- The Data Link Connector (DLC) is located behind the cover in the rear
ash tray (center console) for vehicles up to m. y. 2000
- Open rear ashtray (center console) and remove cover for DLC.

- Connect VAS5051 tester to vehicle with VAS5051/1 diagnostic cable.
Alternately, V.A.G1551 Scan Tool can also be used, using VAG1551/3
adapter.
Pa
ge 5 of 10 On Board Dia
gnostic
(OBD
), initiatin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.AT02.01.3

01-39

VAG - On Board Dia
gnostic HELP
1 - Rapid data transfer2 - Blink code output

Indicated on display
1)
1) Operating modes 1 and 2 are displayed alternately
Notes:
Scan tool V.A.G 1551 operating instructions. Get additional operating instructions by pressing the HELP key of
V.A.G 1551. Use the key to advance within the program sequence. An automatic check (keys 00) can be done in operating mode 1
"Rapid data transfer". This way all vehicle control modules will be
checked automatically.
- Switch on ignition.
- Switch on printer with the Print key (indicator lamp in key lights up).
- Press key 1 for "Rapid data transfer" mode.
Rapid data transfer
HELP
Enter address word XX

Indicated on display:
- Press keys 0 and 2. (Enter the address word "transmission electronics"
with 02.)
Rapid data transfer
Q
02 Transmission electronics

Indicated on display:
- Press Q button to confirm entry.
Pa
ge 7 of 10 On Board Dia
gnostic
(OBD
), initiatin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.AT02.01.3