AUDI A4 1998 B5 / 1.G Radio OBD Workshop Manual

01-1


Radio, On Board Diagnostic
(OBD) (m.y. 1998 )

General information


Technical features of radio systems
The new generation of the Audi radio system has
extensive On Board Diagnostic (OBD) capability.
All radio units have a Diagnostic Trouble Code
(DTC) memory. If a malfunction occurs in one of
the components or wires which is monitored by
the system, a record of the type of malfunction is
stored in DTC memory.
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE02.01.1

01-2

Radio On Board Diagnostic (OBD),
initiating program


Test requirements

Fuse OK per wiring diagram

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

VAG1551 Scan Tool (ST) connected page 01
-108


Ignition switched on

Notes:
If the display remains blank, check the voltage
supply of the VAG1551 Scan Tool (ST)
according to the wiring diagram.
Additional operating instructions can be printed
out by pressing the HELP button.
The button is used to advance through the
program sequence.
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE02.01.1

If an incorrect entry is made, press the -C-
button to escape.
In "Rapid data transfer" operating mode 1 the
"Automatic Test Sequence" function 00 can be
carried out. This checks DTC memory of all
vehicle control modules (with OBD capability)
automatically.
Pa
ge 3 of 34 Radio, On Board Dia
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(OBD
) (m.
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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.EE02.01.1

01-3

- Switch ignition on.

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

- Press button -1- to select "Rapid data transfer"
operating mode 1. Rapid data transfer
HELP
Insert address word XX

Indicated on display
Address word for radio: 56
- Press buttons -5- and -6- to insert "Radio" address word 56.
Rapid data transfer
Q
56 - Radio

Indicated on display
Note:
While the On Board Diagnostic (OBD) program is running "DIAG" will
appear on the radio unit display. - Press -Q- button to confirm input.
Pa
ge 4 of 34 Radio, On Board Dia
gnostic
(OBD
) (m.
y. 1998 [micro]
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE02.01.1

01-4

4B0035186A
Radio
D01
Codin
g 00017
WSC 06812

Indicated on display (after about 5 seconds):
Note:
Check coding against coding table page 01
-22
.
4B0035186A: Part No. for radio ( parts catalog)

Radio: component designation
D01: software version installed in radio
Coding 00017: radio coding
WSC 06812: dealership number
-
Press button.
Pa
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) (m.
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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.EE02.01.1

01-5

Rapid data transfer
HELP
Control module does not answer

Electrical Wiring Diagrams, Troubleshooting & Component Locations - If display shows one of the following messages, carry out
troubleshooting procedure as described in troubleshooting program for
diagnostic wiring.
Rapid data transfer
HELP
Error in communication link

Rapid data transfer
HELP
K wire not switchin
g to Ground

Rapid data transfer
HELP
K wire not switchin
g to B+

Pa
ge 6 of 34 Radio, On Board Dia
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(OBD
) (m.
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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.EE02.01.1

01-6

Rapid data transfer
HELP
Select function XX

Indicated on display
After the HELP button is pressed, a list of the possible functions is printed
out.
On Board Diagnostic (OBD) functions
The following functions are possible:
02 - Check DTC Memory page 01
-7
03 - Output Diagnostic Test Mode (DTM) page 01
-14

05 - Erase DTC Memory page 01
-16

06 - End Output page 01
-18

07 - Code Control Module page 01
-19

08 - Read Measuring Value Block page 01
-25
-
Press button to advance through program sequence.
Pa
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) (m.
y. 1998 [micro]
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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.EE02.01.1

01-7

Check DTC Memory (scan tool function
02)


Note:
The displayed malfunction is only updated when
the On Board Diagnostic (OBD) program is
initiated or when "Erase DTC Memory" function
05 is used.

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

Indicated on display
- Press -Q- button to confirm input.
X DTC reco
gnized!

Indicated on display (the number of stored DTCs)
Stored DTCs are displayed and printed out one after the other.
- Check printout against DTC table and repair all malfunctions as
necessary page 01
-9 .
Pa
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(OBD
) (m.
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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.EE02.01.1

01-8

No DTC recognized!

If "No DTC recognized" is displayed the program will return to the starting
point ("Select function XX" prompt) after the button is pressed.
Rapid data transfer
HELP
Select function XX

Indicated on display
If anything else is displayed:
Scan Tool operating instructions - End output (function 06) page 01
-18
.
- Switch ignition off and disconnect connections from Data Link
Connector (DLC).
Pa
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(OBD
) (m.
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE02.01.1

01-9
Diagnostic Trouble Code (DTC) table for radio system

Notes:

The following table lists all the malfunctions (stored as Diagnostic Trouble Codes, or DTCs) that can be recognized by the
radio system and printed out by the VAG1551 Scan Tool (ST). The DTCs are listed in order according to their 5-digit
numbers.
The DTCs only appear on the print-out from the scan tool.
Before replacing a component shown as faulty, check the wiring and connections to the component as well as Ground
(GND) connections according to the wiring diagram.
When a repair has been carried out, the DTC memory must always be checked again and then erased using the
VAG1551 scan tool.
Static and sporadic malfunctions are stored as DTCs in the DTC memory. If a malfunction occurs and persists for at least
2 seconds, it is identified as a static malfunction. If the malfunction does not occur again it is registered as a sporadic
malfunction and "/SP" will appear at the right of the display.
When the ignition is switched on, all existing malfunctions are automatically re-classified as sporadic malfunctions and will
only be registered as static malfunctions if they still occur after testing.
Sporadic malfunctions which no longer occur after 50 driving cycles (ignition on for at least 5 minutes, road speed of more
than 30 km/h or 19 mph) are erased automatically.
Pa
ge 10 of 34 Radio, On Board Dia
gnostic
(OBD
) (m.
y. 1998 [micro]
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE02.01.1