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Volkswagen Golf Service & Repair Manual: Digital sound package control unit -J525-, vehicles with Volkswagen sound system

Volkswagen Golf Service & Repair Manual / Communication / Infotainment / Sound system / Digital sound package control unit -J525-, vehicles with Volkswagen sound system

Special tools and workshop equipment required
   
Torque wrench -V.A.G 1783-
 

Digital sound package control unit -J525-, vehicles with Volkswagen sound system

Protective cap for wiring harness connector -VAS 6223/9-
If the control unit is replaced, select the Replace function of the respective control unit in Guided fault finding → Vehicle diagnostic tester.
Removing
–  Move front seat to rearmost using longitudinal adjustment mechanism and raise to highest position.
–  Switch off ignition and all electrical consumers, and remove ignition key.
 

Digital sound package control unit -J525-, vehicles with Volkswagen sound system

–  Pull out spreader rivets -2-, slide cover -1- straight in direction of travel and remove it.
 

Digital sound package control unit -J525-, vehicles with Volkswagen sound system

–  Release and unplug connector -2- on digital sound package control unit -J525--1-.
 

Digital sound package control unit -J525-, vehicles with Volkswagen sound system

–  Push protective cap for cable connector -VAS 6223/9--1- onto connector of MOST bus -2-.
 

Digital sound package control unit -J525-, vehicles with Volkswagen sound system

–  Release and unplug connector -3- on digital sound package control unit -J525--1-.
–  Remove bolts -4-.
–  Swing digital sound package control unit -J525--1- out of retainer.
Installing
Install in the reverse order of removal. When doing this, note the following:
  Note
When installing, ensure that the digital sound package control unit -J525- is seated correctly in the groove of the retainer.
When installing the cover, ensure that it is properly fitted on the front edge of the retainer.
 

Digital sound package control unit -J525-, vehicles with Volkswagen sound system

Specified torques
Component Specified torque
Bolt -4- on retainer 3 Nm
 
     
Electrical connectors on digital sound package control unit -J525-
1 -  Multi-pin connector, 38-pin
2 -  MOST bus, 2-pin
 

Digital sound package control unit -J525-, vehicles with Volkswagen sound system

Overview of fitting locations- sound system, vehicles with Dynaudio sound system
On vehicles equipped with a Dynaudio sound system, high-quality Dynaudio loudspeakers can be found at standard fitting locations. The Dynaudio sound system can be ide ...

Digital sound package control unit -J525-, vehicles with Dynaudio
Special tools and workshop equipment required     Torque wrench -V.A.G 1783-   ...

Other materials:

Safety precautions for working on vehicles with Start/Stop system
Risk of injury due to unexpected engine start In vehicles with activated Start/Stop system, the engine may start up unexpectedly. The status of the Start/Stop system is indicated by a message in the dash panel insert. –  Deactivate Start/Stop syste ...

Starting conditions for auxiliary heater, supplementary heater mode
Terminal 15 (ignition) on Engine speed > 600 rpm Coolant temperature < 72 °C Ambient temperature < 5 °C Reserve fuel level not reached ...

Control and regulating unit for air conditioning system -J127
This control and regulating unit switches off the refrigerant flow through the second evaporator if the temperature at the cooling fins of the second evaporator falls to the freezing point of water (icing protection).   ...

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