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List of selectable functions > < Test prerequisites for self-diagnosis

Passat (B3)

Running gear self-diagnosis
Executing self diagnosis
Connecting fault reader V.A.G 1551 and selecting function
  • ● Test prerequisites .

Notes:

  • ◆ The ABS function is switched off in the control unit during the self diagnosis.
  • ◆ The fault memory can only be erased after successful interrogation and repair.
  • ‒ Remove cover for diagnostic sockets on right in front of dash panel.
 
N29-0002
  • ‒ → With ignition switched off connect V.A.G 1551 with cable V.A.G 1551/3 to diagnostic sockets.
 
→ Indicated on display
V.A.G self diagnosis     HELP
1-Rapid data transfer 1)
2-Flash code output*

1) Is displayed alternately

Note:

If the display remains blank, check self diagnosis connector, Electrical check, => Page 01-43 , Test step 42.
 
N29-0002

Notes:

  • ◆ Depending on the programme, additional operating information can be printed out by pressing the HELP key of V.A.G 1551.
  • ◆ The ⇒key is used for moving forward within the programme
  • ‒ Switch on ignition.
  • ‒ Switch on printer with the Print key (indicator lamp in key lights up).
  • ‒ Press key -1- for "Rapid data transfer" operating mode.
 
→ Indicated on display
Rapid data transfer     HELP
Enter address word XX
  • ‒ Press keys -0- and -3-;
    03 inputs the address word of the system to be tested "Brakes electronics".
 
→ Indicated on display
Rapid data transfer     Q
03 Brakes electronics
  • ‒ Confirm input with Q key.
 
→ and then e.g. appears in the display:
1H0 907 379 A     ABS + EDL Teves 04

The control unit identification number is displayed.

Allocation of control unit

=> Parts list

Note:
     
    → If the adjacent fault information appears in the display, the possible causes of the fault can be printed out by pressing the HELP key.
    Rapid data transfer     HELP
    Control unit does not answer!
     
    → (Ignition must be switched on!)
    Rapid data transfer     HELP
    K-wire not switching to positive!
       
      → Faults have occurred at the start or during the programme (external interference?)
      Rapid data transfer          ⇒
      No signal from control unit!
       
      Rapid data transfer          ⇒
      Fault in communication build-up
      • ‒ Check diagnostic wires and also voltage supply and earth connection near the ABS control unit (J104), Electrical test, , Test steps 42 and 43.
      • ‒ After rectifying the possible causes of the fault, again enter the address word 03 for "Brake electronics" and confirm with Q key.
       
      → Indicated on display after entering the address word 03
      Rapid data transfer          
      Tester sends address word 03
       
      → And then the following appears on the display:
      1H0 907 397 A     ABS + EDL Teves 04

      The control unit identification number is displayed.

      • ‒ Press ⇒key.
       
      → Indicated on display
      Rapid data transfer     HELP
      Select function XX

      List of selectable functions > < Test prerequisites for self-diagnosis