Control unit for the onboard network - J519- : removal and fitting

Removing

• Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

• Remove ignition key, if fitted.

Vehicles with access and start authorisation system

• Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

• Remove driver's side footwell cover.
• Unplug connectors -1-, -2- and -3-.

• Unplug electrical connector by pressing catch -1- and moving retaining clip in direction of -arrow-; then detach connector.

• Release retaining springs -arrow-, swivel -onboard supply control unit- out of bracket -5- and remove downwards.

Installing

Installation takes place in reverse order.

Removing and installing bracket for onboard supply control unit - J519-

Removing

• With the ignition switched off, disconnect battery earth cable.
• Removing dash panel insert .
• Cut through cable tie -arrow-.
• Disengage fuse holder C and push to side .
• Remove front parking aid warning buzzer - H22-.
• Removing and installing onboard supply control unit - J519-

• Unscrew screws -2-, -3- and -6- .
• Push bracket -1- as far forward as possible out of the central well, until the centring dowels -4 and 5- hang out.
• Cut through cable ties -arrows-.
• Move electrical wiring harness clear at mounting.
• Take out bracket towards passenger compartment.

Installing

Installation takes place in reverse order.

Removing and installing data bus diagnostic interface - J533-

Removing

• Depending on the configuration, remove the knee airbag on driver's side .
• Remove footwell vent on driver's side .
• Unplug electrical connector -1- using a small screwdriver.
• Release catches -arrows- and pull data bus diagnostic interface - J533- -item 3- downwards off bracket -2-.

Note The exact assignment should be gleaned from the latest current flow diagram .

Installing

Installation takes place in reverse order.