Audi Workshop Service and Repair Manuals

Renewing diesel direct injection system control unit -J248- Removing   Note When the engine control unit is disconnected, the learnt values are erased but the contents of the fault memory remain intact. –  Connect fault reader and select engine electronics control unit with “address word” 01. When doing this, the ignition must be switched on.

The fault reader display shows the control unit identification and the coding -2-. –  Always start by displaying the control unit identification and printing it out. –  Switch off ignition and remove ignition key. –  Detach rubber seal from plenum chamber cover in direction of -arrow-.

–  Detach plenum chamber cover -1- towards the front. –  Lever off both cover caps -3- with a screwdriver. –  Loosen hexagon nuts -4- several turns.

–  Loosen wiper arms -2- from wiper shafts by tilting slightly. –  Completely remove hexagon nuts and take off wiper arms.

–  Pull off retaining clips -1- and detach cowl panel grille -5-.

–  Remove cover of protective housing for control units -arrows-.

–  Carefully lever out retaining strap from engine control unit using a screwdriver -arrow-.

–  Release retaining tabs -arrows- and unplug connectors -1- and -2- from engine control unit. –  Remove engine control unit. –  Release catches and unplug control unit connectors. After installing a new engine control unit, the following operations must be performed: Installation is performed in the reverse sequence. –  Activate engine control unit in “Guided Functions” mode, “Renew engine control unit” → Vehicle diagnosis, testing and information system VAS 5051.