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Vehicle information, measurement and diagnostic system VAS?5051 : connecting and selecting the engine electronics control unit > < Test the exhaust warning lamp

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Fault reader V.A.G 1551: connecting and selecting the engine control unit
Fault reader -V.A.G 1551-: connecting and selecting the engine control unit
Special tools and workshop equipment required
   
t  Fault reader -V.A.G 1551-
  Note!
t  Instead of fault reader -V.A.G 1551-, vehicle systems checker -V.A.G 1552- can also be used, but the results cannot be printed out.
t  AAll functions of the -V.A.G 1551/1552- can also be carried out with the new diagnostic unit -VAS 5051-. Connect the -VAS 5051- → Chapter.
  W00-0459
t  Lead -V.A.G 1551/3B-
Test conditions
  W00-0047
l  Fuses 15, 18, 20 and 21, OK.
l  Battery voltage, 11.5 V minimum
l  Earth connections between the engine (at the gearbox housing) and bodywork (next to the battery), OK.
l  Earth connections on the water tank, OK.
l  On vehicles with air conditioner, the AC must be off.
l  All electrical consumers, for example lights and heated rear window, must be off.
Work sequence
  E01-0119
–  Remove the driver side parcel tray.
–  Connect fault reader -V.A.G 1551- (V.A.G. 1552) with lead -V.A.G 1551/3B-.
Once connected the fault reader:
–  According to the function desired, switch on the ignition or start the engine: → Chapter, “Selectable functions” table.
  Note!
t  If no message appears on the display, test the voltage supply to the diagnostic connector according to the fault finding program: → Current flow diagrams, Electrical fault finding and Fitting locations.
t  If the messages shown with the operation sequence do not appear on the display: → Instructions for use of fault reader.
t  If, due to a keypad error, the message “Error in data transmission” appears, unplug the fault reader lead, plug it in again and repeat the operations sequence.
–  Operate the fault reader bearing in mind the message on the display:
  E01-0120
The display reads:
  
V.A.G. - SELF-DIAGNOSIS             HELP
  1 - Rapid data transmission*
or
* appears alternately.
–  Press 1 for “Rapid Data Transmission”.
  
V.A.G. - SELF-DIAGNOSIS             HELP
  2 - Emission of intermittent codes*
The display reads:
–  Press 0 and 1 for address code “Engine electronics” and press Q to confirm the entry.
  
Rapid data transmission             HELP
Enter address code XX
The display shows the control unit identification and encoding, for example:
t  6K0 906 032K = control unit reference (see Parts Microfiche for current control unit version)
t  ME 7.5.10 = system and version designation
t  S134 = program version
t  Encoding 00001 = control unit encoding
t  WSC xxxxx = identification of shop of the -V.A.G 1551- with which last encoding was carried out. (So long as the factory encoding is not modified, WSC 00000 will appear.)
  Note!
t  If the control unit version corresponding to the vehicle is not displayed, replace the control unit → Chapter.
t  Incorrect engine control unit encoding causes:
t  Faulty driving performance (rough gear changes, abrupt downshifting, etc.)
t  Increased fuel consumption
t  Increased exhaust emissions
t  Nonexistent faults stored in the fault memory
t  Certain functions are not carried out (lambda regulation, activated charcoal filter system activation, etc.)
–  Press →.
  
6K0 906 032K;ME 7.5.10                  
Encoding 00001                 WSC XXXXX
The display reads:
–  Carry on according to the repair descriptions.
  
Rapid data transmission             HELP
Select function XX

Vehicle information, measurement and diagnostic system VAS?5051 : connecting and selecting the engine electronics control unit > < Test the exhaust warning lamp