Audi A4: Control Module/Digital Sound System Amplifier, Removing and Installing
Special tools and workshop equipment required
- Fiber-Optic Repair Set - Connector Protective Caps -VAS6223/9-.
The Digital Sound System Control Module -J525--1- is located behind the left luggage compartment side trim panel.
Note
If replacing the control module, select the "Replace control module" function for the corresponding control module on the Vehicle Diagnostic Tester.
Removing
- Turn off the ignition and all electrical equipment and remove the ignition key.
- Open the left storage compartment in the luggage compartment.
The bracket with the Digital Sound System Control Module -J525- must be removed first.
- Release and disconnect the connectors -1- from the Digital Sound System Control Module -J525--2-.
- Insert the Fiber-Optic Repair Set - Connector Protective Caps -VAS6223/9--1- onto the MOST Bus connector -2-.
- Remove the nuts -arrows- on the bracket and remove the Digital Sound System Control Module -J525--2- with the bracket.
- Remove the bolts -arrows- and remove the Digital Sound System Control Module -J525--1- from the bracket -2-.
Installing
- Install in reverse order of removal. Note the following:
Tightening Specifications
- Refer to → Chapter "Component Location Overview - Sound System, Speaker, Sedan"
- Refer to → Chapter "Component Location Overview - Sound System, Speaker, Avant"
READ NEXT:
Left and Right Rear Treble Speaker -R14-/-R16-, Removing and Installing
The Left Rear Treble Speaker -R14-/Right Rear Treble Speaker
-R16--1- are inside the rear doors
at the top.
Removing and installing is identical.
Removing
- Turn off the ignition and all electr
Front Midrange Speaker, Removing and Installing
The Left Front Midrange Speaker -R103-/Right Front Midrange
Speaker -R104--1- are located in
the center of the front doors.
Removing and installing is identical.
Removing
- Turn off the ignitio
Subwoofer -R211-, Removing and Installing
Subwoofer -R211-, Removing and Installing, Sedan
The Subwoofer -R211- is located in the rear shelf.
Removing
- Turn off the ignition and all electrical equipment and
remove the ignition key.
-&n
SEE MORE:
Overview - Wheel Bearing
Overview - Wheel Bearing, FWD
1 - Wheel Bearing Unit
Removing and installing. Refer to
→ Chapter "Wheel Bearing Unit, Removing and Installing, FWD".
Handling the wheel bearing. Refer to
→ Fig. "Wheel Bearing, Handling".
2 - Front Seal
3 - Wheel Bear
Service Station, Connecting with No Connection on Low- and High Pressure
Side of Refrigerant Circuit
General Information
On the following vehicles, no service connection is provided
for the service station on the low-pressure side of the
refrigerant circuit; adapters must be used to connect the
service station to the refrigerant circuit on these vehicles:
Audi 80, Audi Cabrio, Audi Coupe
Audi
