Volkswagen Jetta / Bora: Electrical System Manual - part 74

♦

The above adaptations can only be carried out in conjunction

with certain equipment configurations.

♦

The “Motorway signaling”, “comfort signaling”, or “tap signal‐

ing” means that one touch of the turn signal lever will activate

the turn signals (1-5 times) (turn signal cycles).

♦

If the onboard supply control unit -J519- is to be replaced, first

carry out the procedure

⇒ “5.1.2 Coding onboard supply control unit J519 ”,

page 293

 , so that access can be gained to the codes stored

within.

Fault detection and fault display:
The onboard supply control unit -J519- is equipped with self-di‐

agnosis, which is designed to ease fault finding.
For fault finding, use the vehicle diagnosis, testing and informa‐

tion system -VAS 5051A- in “guided fault finding” mode.

5.1.1

Removing and installing onboard supply

control unit -J519-

Note

If the onboard supply control unit -J519- is to be replaced, first

carry out the procedure

⇒ “5.1.2 Coding onboard supply control unit J519 ”, page 293

 ,

so that access can be gained to the codes stored within.

Removing:
The removal of the onboard supply control unit -J519- corre‐

sponds to the removal of the relay carrier on onboard supply

control unit, on left of dash panel 

⇒ page 286

 .

Installing:
The installation of the onboard supply control unit -J519- corre‐

sponds to the installation of the relay carrier on onboard supply

control unit, on left of dash panel 

⇒ page 286

 .

5.1.2

Coding onboard supply control unit -

J519-

– Connect Vehicle Diagnosis, Testing and Information System

-VAS 5051A- 

⇒ page 281

 .

– Select “guided fault finding” in Vehicle Diagnosis, Testing and

Information System -VAS 5051A- .

– Using the “Go to” key, select “Function/component selection”

and the following menu items one after the other:

♦ Body
♦ Electrical System
♦ 01 - On Board Diagnostic capable systems
♦ Onboard supply control unit
♦ Onboard supply control unit functions
♦ Code control unit

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5. Control units    

293

Modifying headlight cleaning system

The “active time” of the headlight cleaning system can be variably

adjusted to between 0 and 12.75 seconds.
– Connect the vehicle diagnosis, testing and information system

-VAS 5051A- to 

⇒ page 281

– Select “guided fault finding” in Vehicle Diagnosis, Testing and

Information System -VAS 5051A- .

– Using the “Go to” key, select “Function/component selection”

and the following menu items one after the other:

♦ Body
♦ Electrical System
♦ 01 - On Board Diagnostic capable systems
♦ Onboard supply control unit
♦ Onboard supply control unit functions
♦ Modifying headlight cleaning system

5.2

Data bus diagnostic interface -J533-

Note

Additional information:

⇒ Current flow diagrams, Electrical fault finding and Fitting loca‐

tions
⇒  Operating instructions
General description:
The diagnosis interface for data bus -J533- (gateway) is a sepa‐

rate control unit. It has the following functions in the vehicle:
♦ Responsible for exchange of data between CAN data bus sys‐

tems “drive train CAN data bus”, “convenience CAN data bus”

and “Infotainment CAN data bus”

♦ Converts diagnostic data from CAN data bus systems to COM

wire and vice versa. In this way, data can also be used by the

the vehicle diagnosis, testing and information system -VAS

5051A-

Note

If the data bus diagnostic interface -J533- is to be removed, first

carry out the procedure

⇒ “5.2.1 Renewing data bus diagnostic interface J533 ”,

page 295

 , so that access can be gained to the codes stored

within.

Fault detection and fault display:
The data bus diagnostic interface -J533- is equipped with self-

diagnosis, which is designed to ease fault finding.
For fault finding, use the vehicle diagnosis, testing and informa‐

tion system -VAS 5051A- in “guided fault finding” mode.

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294

Renewing data bus diagnostic interface

-J533-

– Connect Vehicle Diagnosis, Testing and Information System

-VAS 5051A- 

⇒ page 281

 .

– Select “guided fault finding” in Vehicle Diagnosis, Testing and

Information System -VAS 5051A- .

– Using the “Go to” key, select “Function/component selection”

and the following menu items one after the other:

♦ Body
♦ Electrical System
♦ 01 - On Board Diagnostic capable systems
♦ Data bus diagnostic interface
♦ Data bus diagnostic interface functions
♦ Renewing data bus diagnostic interface

5.2.2

Removing and installing data bus diag‐

nostic interface -J533-

Removing:

Note

Before removing data bus diagnostic interface -J533- , it is es‐

sential that the following work procedure

⇒ “1.1 Renewing dash panel insert”, page 150

 is carried out, so

that access can be gained to the codes stored within.

– Switch off ignition and all electrical consumers and pull out

ignition key.

– Remove cover, footwell, on driver side ⇒  General body re‐

– Release connector -1- and pull connector off data bus diag‐

nostic interface -J533- -2-.

– Push securing pins -3- together -arrows- and pull out of holes.
Installing:
Install in reverse order of removal.

5.3

Central control unit for convenience sys‐

tem -J393-

Note

Additional information:

⇒ Current flow diagrams, Electrical fault finding and Fitting loca‐

tions

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5. Control units    

295

for the following in the vehicle:
♦ Sliding/tilting sunroof control (release instruction)
♦ Power window control (release instruction)
♦ Central locking control
♦ Anti-theft alarm system control
♦ Radio-wave receiver
♦ Rear lid lock
♦ Comfort operation
Some of the above functions can be adapted 

⇒ page 298

 .

Fault detection and fault display:
The convenience system central control unit -J393- is equipped

with self-diagnosis, which is designed to ease fault finding.
For fault finding, use the vehicle diagnosis, testing and informa‐

tion system -VAS 5051A- in “guided fault finding” mode.

5.3.1

Removing and installing convenience

system central control unit -J393-

Removing:
– Switch off ignition and all electrical consumers and pull out

ignition key.

– Remove glove compartment ⇒  General body repairs, interior;

Rep. Gr.  68 ; Compartments, covers and trim; Removing and

installing glove compartment .

– Pull locking lug -1- off convenience system central control unit

-J393- bracket in -direction of arrow- and move the conven‐

ience system central control unit -J393- until the recesses

-2- align with the recesses -3-.

Note

The connectors may only be unlocked and pulled off if the re‐

cesses -arrows- of the connectors and the bracket align exactly.

– Unlock connectors and pull them off convenience system cen‐

tral control unit -J393- .

Note

The connector number depends on vehicle equipment.

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296