Volkswagen Golf Service & Repair Manual: Engine control unit

Removing and installing lambda probe 1 before catalytic converter -GX10-/lambda probe 1 after catalytic converter -GX7-

Lambda probe 1 before catalytic converter -GX10- consists of Lambda probe -G39- Lambda probe heater -Z19- ...

Removing and installing engine control unit -J623- (with metal locking plate)

Special tools and workshop equipment required     Hot air blower -VAS 1978/14A--1- with nozzle -2- fr ...

Other materials:

Removing and installing control unit for electronic steering column lock -J764-
  Note When renewing control unit, select Renewal function for respective control unit in “Guided fault finding” or “Guided functions” using → Vehicle diagnostic tester. Special tools and workshop equipmen ...

Overview of fitting locations - operating and display unit, air conditioning system with electric/manual controls
  Note A warning lamp in the instrument panel controls will indicate that the selected function is active. If the warning lamp does not light up after the AC button is pressed, a fault may be stored in the control ...

Overview - navigation system
The navigation system is available as Discover Media and Discover Pro version with navigation. The navigation function is integrated in control unit 1 for information electronics -J794-. For Discover Media version, the n ...