Volkswagen Golf / Golf GTI / Golf Variant. Service manual - part 980

Fault finding is performed via 

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 as a “connecting cable”. Fiber optic

cables are routed inside corrugated tubes for protection.
Replace complete fiber optic cable if possible.
The front surface of the connectors must not be dirty.
If disconnecting the connectors: Attach Fiber-Optic Repair Set -

Connector Protective Caps - VAS6223/9- .
When installing fiber optic cables, make sure not to go below the

minimum bending radius of 25 mm. Do not crush or kink fiber optic

cables.
Fiber-optic cable, repairing. Refer to

⇒ “1.1 General Repair Information”, page 1

 .

1.2

Component Location Overview - Info‐

tainment System

⇒ “1.2.1 Component Location Overview - Infotainment System,

Sedan”, page 9
⇒ “1.2.2 Component Location Overview - Infotainment System,

Wagon”, page 11

1.2.1

Component Location Overview - Infotainment System, Sedan

1 - Multifunction Buttons in

Steering Wheel

❑ Left Multifunction But‐

tons On Steering Wheel

- E440-

❑ Right Multifunction But‐

tons On Steering Wheel

- E441-

❑ Removing and instal‐

ling. Refer to

⇒ “8.3 Right/Left Multi‐

function Buttons On

Steering Wheel E441 /

E440 , Removing and

Installing”, page 56

 .

2 - Front Information Display

Control Head - J685-

❑ Inside the center of the

instrument panel

❑ Removing and instal‐

ling. Refer to

⇒ “1.3 Infotainment Sys‐

tem Display, Removing

and Installing”,

page 12

 .

3 - Information Electronics

Control Module 1 - J794-

❑ In the glove compart‐

ment

❑ Connector assignment.

Refer to ⇒ Wiring dia‐

grams, Troubleshooting

& Component locations.

❑ Removing and instal‐

ling. Refer to

⇒ “1.4  Information Elec‐

tronics Control Module 1

J794 , Removing and Installing”, page 13

 .

4 - Rear Window Antennas
5 - Roof Antenna - RX5-

❑ Removing and installing. Refer to 

⇒ “3.5.1 Roof Antenna, Removing and Installing, Sedan”, page 35

 .

6 - Connection for External Multimedia Devices

❑ In the front center console storage compartment
❑ Removing and installing. Refer to

⇒ “9.2  External Audio Source Connection R199 , Removing and Installing”, page 61

 .

7 - Digital Sound System Control Module - J525-

❑ Under the left front seat
❑ Connector assignment. Refer to ⇒ Wiring diagrams, Troubleshooting & Component locations.
❑ Removing and installing. Refer to

⇒ “2.3 Control Module/Digital Sound System Amplifier, Removing and Installing”, page 20

 .

1.2.2

Component Location Overview - Infotainment System, Wagon

1 - Multifunction Buttons in

Steering Wheel

❑ Left Multifunction But‐

tons On Steering Wheel

- E440-

❑ Right Multifunction But‐

tons On Steering Wheel

- E441-

❑ Removing and instal‐

ling. Refer to

⇒ “8.3 Right/Left Multi‐

function Buttons On

Steering Wheel E441 /

E440 , Removing and

Installing”, page 56

 .

2 - Front Information Display

Control Head - J685-

❑ Inside the center of the

instrument panel

❑ Removing and instal‐

ling. Refer to

⇒ “1.3 Infotainment Sys‐

tem Display, Removing

and Installing”,

page 12

 .

3 - Roof Antenna - RX5-

❑ Removing and instal‐

ling. Refer to

⇒ “3.5.1 Roof Antenna,

Removing and Instal‐

ling, Sedan”,

page 35

 .

4 - Information Electronics

Control Module 1 - J794-

❑ In the glove compart‐

ment

❑ Connector assignment. Refer to ⇒ Wiring diagrams, Troubleshooting & Component locations.
❑ Removing and installing. Refer to

⇒ “1.4  Information Electronics Control Module 1 J794 , Removing and Installing”, page 13

 .

5 - USB Charging Socket 1 - U37-

❑ In the front armrest storage compartment
❑ Removing and installing. Refer to

⇒ “9.4  USB Charging Socket 1 U37 , Removing and Installing”, page 62

 .

6 - Connection for External Multimedia Devices

❑ In the front center console storage compartment
❑ Removing and installing. Refer to

⇒ “9.2.2  External Audio Source Connection R199 , Removing and Installing”, page 61

 .

7 - Digital Sound System Control Module - J525-

❑ Under the left front seat
❑ Connector assignment. Refer to ⇒ Wiring diagrams, Troubleshooting & Component locations.
❑ Removing and installing. Refer to

⇒ “2.3 Control Module/Digital Sound System Amplifier, Removing and Installing”, page 20

 .

1.3

Infotainment System Display, Removing

and Installing

Special tools and workshop equipment required
♦ Trim Removal Wedge - 3409-
♦ Radio Removal Tool - T10057-
Removing
– Turn off the ignition and all electrical equipment.
– Remove the ignition key, if equipped.

Caution

Risk of damaging the component surfaces.

♦ When positioning a prying tool, put commercially available

adhesive tape over the component in the visible area.

– Remove the instrument panel center trim (together with the

center vent). Refer to ⇒  Body Interior; Rep. Gr.  70 ; Instrument

Panel; Instrument Panel Vent, Removing and Installing .

– Insert the Radio Removal Tool - T10057- into the release slots

-1- on the Front Information Display Control Head - J685- .

– Release the upper locking mechanisms -1- by pushing in di‐

rection of travel.

– Release the lower locking mechanisms -1- by pushing in di‐

rection of travel.

– Remove the Front Information Display Control Head - J685-

-2-.

– Release and disconnect the connectors.
Installing
Install in reverse order of removal. Note the following:

Caution

Risk of damaging the components.

♦ When inserting the Front Information Display Control

Head - J685- , do not push on the display and the control

equipment.

– Install the Front Information Display Control Head - J685- until

it engages.