audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Components not located in passenger compartment (all models) > < Checking gap between pulley and clutch plate

A4 Mk3

Components for control and regulation of air conditioner not located in passenger compartment
Components for control and regulation of air conditioner not located in passenger compartment
  Note
t  In the event of a fault in the air conditioner, start by reading out the event recorder of the air conditioner operating and display unit, Climatronic control unit -J255- → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051. If the display indicates that the event recorder of another control unit is to be read out, read out the event recorder of this control unit as well (e.g. onboard supply control unit -J519-, convenience system central control unit -J393-). Certain air conditioner components (e.g. air conditioner compressor regulating valve -N280-, refrigerant pressure and temperature sender -G395-) are no longer actuated directly by the air conditioner operating and display unit, Climatronic control unit -J255- or their measured values are no longer evaluated directly by the air conditioner operating and display unit, Climatronic control unit -J255-.
t  If no fault is displayed, read out the measured value block of the air conditioner operating and display unit, Climatronic control unit -J255- and actuate any problematic component by way of the „Final control diagnosis“ function → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
t  The „Electrical checks“ function is not described in this Workshop Manual. When implementing electrical checks by way of the „Guided fault-finding“ function, information is given on the functions to be checked. → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
t  The temperature-sensitive resistance values for the various temperature sensors are listed in tables which can be called up via the „Guided fault-finding“ function. → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
t  Electrical checking of the various control motors is described in the guided fault-finding routine → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
t  Refrigerant circuit servicing work is described as of → Chapter.
t  Perform the following operations on completion of repair work:
–  Interrogate the event recorder of the air conditioner operating and display unit, Climatronic control unit -J255- and erase any faults displayed → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
–  Check the encoding of the air conditioner operating and display unit, Climatronic control unit -J255- → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
–  Check the adaption of the air conditioner operating and display unit, Climatronic control unit -J255- → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
–  Perform air conditioner basic setting → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
t  Components not located in passenger compartment → Chapter
t  Components not located in the passenger compartment and only fitted on vehicles with a high-voltage system (hybrid vehicles) or differing from those in vehicles with no high-voltage system → Chapter „Components not located in passenger compartment on vehicles with a high-voltage system“
  Note
Components which are identical on vehicles both with and without a high-voltage system → Chapter
   

Components not located in passenger compartment (all models) > < Checking gap between pulley and clutch plate