Volkswagen Jetta / Bora: Electrical System Manual - part 75

-J393- .

– Pull locking lug -1- in -direction of arrow B- and push conven‐

ience system central control unit -J393- -2- out of the bracket

in -direction of arrow A-.

Installing:
Installation is performed in the reverse order of installation; when

doing this, note the following:

Note

♦

After installing a new convenience system central control unit

it must be coded 

⇒ page 297

 .

♦

The connectors may only be placed and locked if the recesses

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

5.3.2

Coding convenience system central

control unit -J393-

– 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
♦ General Body Repairs
♦ 01 - On Board Diagnostic capable systems
♦ Comfort system
♦ Comfort system central control unit functions
♦ J393 - Coding convenience system central control unit

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5. Control units    

297

Adapting convenience system central

control unit -J393-

The following functions can be adapted:
♦ Activating and deactivating “single door opening”
♦ Activating and deactivating “automatic locking above >15 Km/

h”

♦ Activating and deactivating “automatic unlocking when ignition

key is removed”

♦ Activating and deactivating “country settings for intelligent

alarm horn”

♦ Activating and deactivating “battery monitoring system (soun‐

der)”

♦ Activating and deactivating “comfort operation via radio re‐

mote control unit”

♦ Activating and deactivating “anti-theft alarm system - alarm

delay when driver's door is opened”

♦ “Sensitivity of tilt angle sensor”
♦ “Sensitivity of interior monitoring system”
– 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
♦ General Body Repairs
♦ 01 - On Board Diagnostic capable systems
♦ Comfort system
♦ Comfort system central control unit functions
♦ J393 - Adapting convenience system central control unit

5.3.4

Convenience system central control unit

-J393- - Read alarm sources of anti-theft

alarm system

– 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
♦ General Body Repairs
♦ 01 - On Board Diagnostic capable systems
♦ Comfort system
♦ Comfort system central control unit functions
♦ J393 - Read alarm sources of anti-theft alarm system

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298

Trailer detector control unit -J345-

The trailer detector control unit -J345- -arrow- is located behind

the left side trim in the luggage compartment.

Note

Additional information:

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

tions
⇒  Operating instructions
General description:

Note

♦

The Golf currently features only control units manufactured by

Westfalia.

♦

To check the control unit use plug socket tester -V.A.G 1537/

A-

⇒ “5.4.3 Final control diagnosis trailer detector control unit

J345 ”, page 301

 .

The trailer detector control unit -J345- etects from a power draw

of minimum 5 W

4)

 the “trailer operation” and transfers this infor‐

mation to various control units via the CAN databus.
The trailer detector control unit -J345- is supplied with information

(light control) from the onboard supply control unit -J519- and

convenience system central control unit -J393- via the CAN.

4) At least the turn signal and brake light must be switched on, in order to detect

“trailer operation”.

Fault detection and fault display:
The trailer detector control unit -J345- is equipped with self-diag‐

nosis, 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.

5.4.1

Removing and installing trailer detector

control unit -J345-

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

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5. Control units    

299

ignition key.

– Remove left side panel trim in luggage compartment ⇒  Gen‐

ling load and luggage compartment trim; Trim, luggage

compartment, sidewards .

– Release connectors -2- and pull off trailer detector control unit

-J345- .

Note

The connector number on the trailer detector control unit -J345-

shown in the figure depends on vehicle equipment and may vary.

– Remove securing bolts -1- and take trailer detector control unit

-J345- with the bracket out of the vehicle.

– Remove securing bolts -arrows- and take trailer detector con‐

trol unit -J345- off bracket.

Installing:
Installation is performed in the reverse order of installation; when

doing this, note the following:
– Tighten threaded connections to specified torque settings

⇒ page 307

 .

Note

After installing a new trailer detector control unit -J345- it must be

coded 

⇒ page 300

 .

5.4.2

Coding trailer detector control unit -

J345-

– 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
♦ General Body Repairs
♦ 01 - On Board Diagnostic capable systems
♦ Trailer detector
♦ Function
♦ Coding trailer detector control unit

Jetta 2005 ➤ , Bora 2006 ➤

300