wiring AUDI A4 1999 B5 / 1.G Radio System Workshop Manual

91-2

Notes:

A new generation of the radio is being used for
model year 1998. The "Delta" radio will be
replaced by the "Concert" radio which has On
Board Diagnostic (OBD) capability.
When addressing customer complaints, it is
absolutely necessary to know the functions and
the operation of the radio system.
For additional information:

Radio operating instructions

When retrofitting, repairing or
troubleshooting:

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

Radio installation instructions
Repair Manual "Body Interior" contains detailed
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91-3

Retrofitting radio systems

The connectors on the factory-installed radio
wiring harness are designed for genuine Audi
radios.
Radios with different types of connectors must
be installed using adapter wires.

CAUTION!

When connecting the vehicle speed sensor
signal wire (on radios with the GALA
function), take particular care to avoid short
circuits, which could result in vehicle
malfunctions (e.g. in the engine management
system).
Vehicle malfunctions may also occur if the
vehicle speed sensor signal wire is connected
to radios supplied by other manufacturers.
If a non-stock radio is installed ("Concert" m.y.
1998 ) it can have a negative effect on the
antenna amplifier. The original Audi radio units
supply power to the antenna amplifier through
the center wire of the HF cable.

Retrofitting CD systems
The wiring for the CD changer is installed in the
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91-34

Checking cable between radio and CD
changer

- Switch radio off.

- Press MODE button on radio while turning radio
on.
Do not press the MODE button again.

If the cable connection is OK:
The radio display indicates: "CONNECT" and
"CD"

If the cable connection is NOT OK:
The radio display indicates: "NO CDC"

- Check electrical connections on CD changer.

- Repeat check as described above.
If not OK:

- Check wiring connections Electrical Wiring
Diagrams Troubleshooting & Component
Locations
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE02.91.1