| Trailer detector control unit -J345- |
| The trailer detector control unit -J345- is located behind the left side panel trim in the luggage compartment. |
Note | The trailer detector control unit -J345- detects from a power draw of minimum 5 W → Remark the „trailer operation“ and transmits this information to various control units via the CAN data bus. |
| The onboard network control unit -J519- sends information (light control) to the trailer detection unit -J345- via the CAN-Bus 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. |
| For fault location, use the „Guided fault location“ function for one of the systems described in the chapter Vehicle Diagnosis, Testing and Information System -VAS 505X- → Chapter. |
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