Volkswagen Jetta 2005 Workshop Manual page 309

5.4.3 Final control diagnosis trailer detector
control unit -J345-
Note
The trailer detector control unit -J345- detects from a power
♦
draw of minimum 5 W
To check use plug socket tester -V.A.G 1537/A- .
♦
Special tools and workshop equipment required
♦ Plug socket tester -V.A.G 1537/A-
5) After a few minutes the plug socket tester -V.A.G 1537/A- gets to hot and
switches off automatically. After a cooling period the plug socket tester -V.A.G
1537/A- works again perfectly.
– Connect the plug socket tester -V.A.G 1537/A- .
– 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
♦ Trailer detector control unit - Final control diagnosis
the "trailer operation".
4)
5)
.
Jetta 2005 ➤ , Bora 2006 ➤
Electrical System - Edition 05.2005
301
5. Control units