| Removing and installing onboard supply control unit |
| The onboard supply control unit -J519- is fastened to the rear of the relay carrier in the driver side footwell and performs the following functions in the vehicle. |
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| Electrical load management |
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| Transfer of dimming information on the CAN bus |
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| Windscreen wiper speeds I, II and intermittent wipe |
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| Reading in of sender unit button for emergency braking function |
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| Operation of hazard warning flasher, turning signals, emergency braking warning flasher |
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| Terminal detection, terminal 15; S-contact |
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| Rear lid release without central locking |
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| Terminal 30, interior light |
| The following functions can be adapted → Chapter: |
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| Adapting remote control key |
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| Checking remote control unit key |
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| Deactivating factory mode |
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| If the onboard supply control unit -J519- is to be renewed, the procedure for „replacing onboard supply control unit“ → Chapter must always be carried out for reading the codes stored in the control unit. |
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| The following illustrations show removal on a LHD model. Removal and installation of onboard supply control unit on an RHD vehicle are performed using the corresponding mirror-image procedure. |
| Replacement of onboard supply control unit: |
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| First of all, carry out the work involved in „replacing the onboard supply control unit“ → Chapter. |
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| Switch off ignition and all electrical loads, and pull out ignition key. |
Note | For reasons of space, the fuse holder has to be removed from the relay carrier but can remain connected. |
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| Remove fuse holder from relay carrier → Chapter. |
Note | The following illustration shows the installed onboard supply control unit on the rear of the relay carrier. |
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