Trailer detector control unitJ345

Make

Volkswagen

Model

Polo Mk5

Section

Wiring › Control units › Trailer detector control unitJ345

Vehicle electricsTrailer detector control unitJ345

Trailer detector control unit -J345- The trailer detection control unit -J345- is located behind the right side panel trim in the luggage compartment.   Note Additional information: → Current flow diagrams, Electrical fault finding and Fitting locations → Operating manual General description: The trailer detection control unit -J345- only detects „Trailer operation“ as of a power decrease of at least 5 W → Remark. It passes this information on to diverse control units via the CAN data bus. 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 data bus. 1)  „Trailer operation“ can only be detected if at least turn signal indicators or side marker lights are switched on. Fault detection and fault display: The trailer detector control unit -J345- features self-diagnosis to facilitate fault finding. To localise faults, refer to chapter entitled „Vehicle diagnosis, testing and information system“ and use „Guided fault finding“ function.   Note For checking control unit, use socket tester -V.A.G 1537/A- or trailer socket tester -VAS 5800-. Special tools and workshop equipment required

t  Trailer socket tester -VAS 5800-

t  Socket tester -V.A.G 1537/A-

03 General