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List of selectable functions > < Connecting fault reader V.A.G 1551 and selecting functions

Leon Mk2

Automatic gearbox 099 4-speed self-diagnosis
Performing self-diagnosis
Automatic test sequence
  • The automatic test sequence interrogates all the fault memories of the control units.
  • ‒ Before selecting the gearbox control unit perform the automatic test sequence. Faults of other control units can influence the gearbox control unit. This is especially valid on vehicles with data bus.
  • ‒ Switch on ignition.
 
→ Indicated on display:
V.A.G - SELF-DIAGNOSIS    HELP
1 - Rapid data transfer1)
2 - Flash code output1)

1) Is displayed alternately

  • ‒ Press key -1- for "Rapid data transfer" operating mode.
  • ‒ Switch on printer with the Print key (indicator lamp in key lights up).
 
→ Indicated on display:
Rapid data transfer    HELP
Select function XX
  • ‒ Press key -0- twice; 00 enters the "Interrogate automatic test sequence" function.
  • ‒ Confirm entry with Q key.
  • Then all control unit identifications, together with entries which may be in fault memory, are displayed.
  • ‒ After test sequence, the V.A.G 1551 returns to the following start position:
 
→ Indicated on display:
V.A.G - SELF-DIAGNOSIS    HELP
1 - Rapid data transfer1)
2 - Flash code output1)

    1)    appears alternately

Select automatic gearbox control unit

  • ‒ Switch on ignition.
  • ‒ Switch on printer with the Print key (indicator lamp in key lights up).
  • ‒ Press key 1 for "Rapid data transfer" mode.
 
→ Indicated on display:
Rapid data transfer     HELP
Enter address word XX
  • ‒ Press keys 0 and 2. (Enter the address word "gearbox electronics" with 02.)
 
→ Indicated on display:
Rapid data transfer     Q
02 Gearbox electronics
  • ‒ Confirm entry with key Q.
 
→ Indicated on display:
099927733AN    AG4 gearbox 099    4762
Coding 00000    WSC 00000

The control unit identification, the coding and the dealership number of the V.A.G 1551 are displayed:

Control unit identification

Depending upon build level (programme level) the control unit can indicate a different control unit identification, to that shown in the example. Allocation of control unit => Parts catalogue.

  • ◆ 099 927 733AN: Part No.
  • ◆ AG4 Gearbox 099: 4-speed automatic gearbox 099
  • ◆ 4762: EPROM (Programme level)
  • ◆ Coding 00000: is not required at present.
  • ◆ WSC 00000: V.A.G 1551 dealership number with which the last coding was performed.
 
→ Indicated on display:
Rapid data transfer    HELP
Control unit does not answer!
  • ‒ By pressing the HELP key, a list of possible fault causes is printed out.
  • ‒ After eliminating the possible causes of faults, again enter the address word 02 for "gearbox electronics" and confirm.

If "Control unit does not answer!" again appears:
 
→ Indicated on display:
Rapid data transfer    HELP
Control unit does not answer!

Check control unit voltage supply.

  • ‒ Perform test step 1 , Electrical check.
  • ‒ Check wiring connections to diagnostic sockets

=> Current flow diagrams, Electrical fault finding and Fitting locations binder

  • ‒ => Fault table, page 01-41 under fault code 65535 control unit faulty!
  • ‒ Press ⇒ key.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ After the HELP key is pressed, a list of the possible functions is printed out.

List of selectable functions > < Connecting fault reader V.A.G 1551 and selecting functions