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Checking CO2 content in exhaust gas of auxiliary heater > < Test requirements

A4 Mk2

Preparation
Preparation
   
–  With the ignition switched off, connect up vehicle diagnostic, testing and information system -VAS 5051A- using, for example, diagnostic wire -VAS 5051/5A- and K-wire adapter -VAS 6017B- (or K-wire adapter -VAS 6017A-) to the 16-pin diagnostic socket in the vehicle.
  Note
On vehicles as of chassis number “400000” in Model Year 2005 (Saloon and Avant; gradual introduction for the Cabrio in week 46/04 with no prior specification of any particular chassis number → Parts List) and depending on the vehicle equipment, certain control units will no longer be connected to the K / L-wire of the 16-pin diagnostic socket in the vehicle (e.g. engine control unit -J623-, automatic gearbox control unit -J217- and airbag control unit -J234-) → Current flow diagrams, Electrical fault finding and Fitting locations. These control units use “CAN signal wires” to exchange information for example with the vehicle diagnostic, testing and information system -VAS 5051A-. As the K-wire adapter -VAS 6017A- is not provided with these connections, the K-wire adapter -VAS 6017B- is required for the self-diagnosis of these control units.
–  Switch on ignition.
  A01-0119
–  Select “Vehicle self-diagnosis” function on vehicle diagnostic, testing and information system -VAS 5051A-.
  Note
t  Vehicle system selection prompt appears in display zone -1-.
t  “Scrolling” the screen display with the bar -2- permits display of vehicle systems (for all vehicle models and equipment levels) which are intended for self-diagnosis but are not currently visible on the screen.
  A87-0312
–  Select the following vehicle systems and read out fault memory of these systems:
–  17 - Dash panel insert
–  08 - Air conditioner/heater electronics
–  18 - Supplementary/auxiliary heater
–  Eliminate cause of any faults displayed in these vehicle systems and erase fault memory.
  A87-0313

Checking CO2 content in exhaust gas of auxiliary heater > < Test requirements