Overview - Sound System, Standard Sound System (9VD)

The standard sound system consists of the following components:

• One loud speaker on the left side, center and right side of the instrument panel
• One speaker in the left and right front doors
• One speaker in the left and right B-pillars
• One loud speaker in the left and right rear doors
• Subwoofer -R211- in the rear luggage compartment floor
• Information Electronics Control Module 1 -J794- behind the glove compartment

Fig 1: 9VD - Audi Sound System Circuit Diagram

Courtesy of AUDI

1. Information Electronics Control Module 1 -J794- behind the glove compartment
2. Left Front Treble Speaker -R20- /Right Front Treble Speaker -R22- on Left and Right Sides of the Panel
3. Left Front Bass Speaker -R21- /Right Front Bass Speaker -R23- in the Lower Front Doors
4. Left Rear Treble Speaker -R14- /Right Rear Treble Speaker -R16- in the B-Pillars on the Left and Right Side
5. Left Rear Bass Speaker -R15- /Right Rear Bass Speaker -R17- at Bottom of the Rear Doors
6. Center Speaker -R208- in the Center Instrument Panel
7. Subwoofer -R211- in the rear luggage compartment floor
8. MOST Bus

Fault Finding is performed using the "Guided Fault Finding" on the Vehicle Diagnostic Tester.

Notes on MOST bus

The optical data bus "MOST bus" is used in addition to the CAN bus.

A fiber-optic cable is used. Fiber optic cables are routed inside corrugated tubes for protection.

Replace the complete fiber-optic cable if possible.

The front surfaces of the connectors must not get dirty.

If the connectors are disconnected: connect the Fiber-Optic Repair Set - Connector Protective Caps:VAS6223/9  from the Fiber-Optic Repair Set:VAS6223A  .

Fig 2: Fiber-Optic Conductor Repair Set VAS 6223A

Courtesy of AUDI

When routing fiber-optic cables, make sure not to go below the minimum bending radius of 25 mm. Do not crush or kink the fiber-optic cables.

Fiber-optic cable repair. Refer to FIBER-OPTIC CABLES, REPAIRING .