WARNING: This page is about a different car, the 2017 Volkswagen Touareg, 2016 Volkswagen Touareg, and 2015 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

Digital Sound System Control Module -J525-

Fig 1: Digital Sound System Control Module -J525-

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

A - MOST bus

B - 18-Pin Connector

C - 32-Pin Connector

A - MOST Bus

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Optical MOST bus fiber-optic cable, opt. 1
Optical MOST bus fiber-optic cable, opt. 2

18-Pin Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Microphone 1, positive
Microphone 1, shield
Not Assigned
Right Rear Audio (+), only RCD 550
Left Rear Audio (+), only RCD 550
Right Front Audio (+), only RCD 550
Left Front Audio (+), only RCD 550
Not Assigned
CAN Bus Infotainment (CAN-High), only RCD 550
Microphone 1, negative
Not Assigned
Not Assigned
Right Rear Audio (-), only RCD 550
Left Rear Audio (-), only RCD 550
Right Front Audio (-), only RCD 550
Left Front Audio (-), only RCD 550
Ground/Ring break diagnosis (CAN-Bus Ground on RCD 550, Ring break diagnosis on RNS 850)
CAN Bus Infotainment (CAN-Low), only RCD 550

32-Pin Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Power supply, positive, terminal 30
Power Supply, Negative, Terminal 31
Left Rear Treble Speaker, Positive
Right Rear Treble Speaker, Positive
Mid-range center speaker, positive
Left Front Mid-Range Speaker, Positive
Right Front Mid-Range Speaker, Positive
Left Front Treble Speaker, Positive
Right Front Treble Speaker, Positive
Right Rear Treble Speaker, Positive
Treble center speaker, negative
Treble center speaker, positive
Not Assigned
Not Assigned
Left Rear Treble Speaker, Negative
Right Rear Treble Speaker, Negative
Mid-range center speaker, negative
Left Front Mid-Range Speaker, Negative
Right Front Bass Speaker, Negative
Left Front Treble Speaker, Negative
Right Front Bass Speaker, Negative
Right Rear Treble Speaker, Negative
Left Rear Treble Speaker, Positive
Left Front Bass Speaker, Negative
Left Front Bass Speaker, Positive
Not Assigned
Not Assigned
Left Rear Bass Speaker, Negative
Right Front Bass Speaker, Positive
Right Front Bass Speaker, Negative
Not Assigned
Not Assigned

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Digital Sound System Control Module -J525-, CONNECTOR OVERVIEW

Use the Manual With the Right Hardware

When to See a Mechanic