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

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.
Pa
ge 2 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
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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
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

01-9
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

01-10

DTC
Possible cause
Corrective action
VAG1551 Scan Tool display
00668
Battery Positive Voltage (B+)
Term. 30

Signal too low
Battery discharged or faultyShort circuit in vehicle electrical
system - Charge or replace battery.
- Repair short circuit in vehicle electrical system.
00849
S Contact on Ignition Starter
Switch

Open circuit
Ignition/starter switch -D- faultyOpen circuit in wiring
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Replace ignition/starter switch -D-.
- Trace malfunction using wiring diagram.
00850
Control Output Active, Radio
Amplifier

Short circuit to Ground
Wiring damagedActive amplifier faulty
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Trace malfunction using wiring diagram.
- Replace active amplifier.
Pa
ge 11 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

01-11

DTC
Possible cause
Corrective action
VAG1551 Scan Tool
display
00852
Loudspeaker front

Short circuit
Open circuit
Wiring damaged
Front loudspeaker
faulty
Open circuit in wiring Electrical Wiring Diagrams, Troubleshooting & Component
Locations - Trace malfunction using wiring diagram.
- Replace faulty loudspeaker.
- Repair open circuit.
00853
Loudspeaker rear

Short circuit
Open circuit
Wiring damaged
Rear loudspeaker
faulty
Open circuit in wiring Electrical Wiring Diagrams, Troubleshooting & Component
Locations - Trace malfunction using wiring diagram.
- Replace faulty loudspeaker.
- Repair open circuit.
Pa
ge 12 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

01-12

DTC
Possible cause
Corrective action
VAG1551 Scan Tool
display
00854
Output Radio Display
Dash Panel Insert

No signal
Open circuit in wiring
Instrument cluster
combination processor faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Repair Manual, Electrical Equipment, Repair Group 90;
removing and installing instrument cluster
- Trace malfunction using wiring diagram.
- Replace faulty instrument cluster.
00855
Connection to CD
Changer

No signal
Open circuit in wiring
Voltage supply to CD changer
unit interrupted
CD changer unit -R41- faulty Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Trace malfunction using wiring diagram.
- Check voltage supply to CD changer unit using wiring
diagram.
- Replace CD changer unit.
Pa
ge 13 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

01-13

DTC
Possible cause
Corrective action
VAG1551 Scan Tool
display
00856
Radio Antenna

Short circuit
Open circuit
Open circuit in wiring
Short circuit in antenna wire
Electrical Wiring Diagrams, Troubleshooting &
Component Locations - Trace malfunction using wiring diagram.
- Check antenna wire.
01044
Control Module incorrectly
coded
Radio not coded to match
configuration in vehicle - Code radio according to vehicle.
65535
Control Module
Malfunctioning Radio faulty- Replace radio.
Pa
ge 14 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