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Interrogating fault memory > < Technical data of self diagnosis

Polo Mk3

Diesel injection and glow plug system
Self diagnosis
Connecting fault reader V.A.G 1551 and selecting engine electronics control unit

Special tools, testers and auxiliary items

  • ◆ Fault reader V.A.G 1551 with cable V.A.G 1551/3

Note:

The vehicle system tester V.A.G 1552 can be used instead of the fault reader V.A.G 1551, however a print-out is not possible.

Test conditions
 
N29-0013
  • ● Battery voltage OK.
  • ● Fuse 21 OK.
  • ● Earth connections on engine and gearbox OK.

Work sequence

  • ‒ → Fold down left shelf.
  • ‒ Connect fault reader (or vehicle system tester) with cable V.A.G 1551/3.
 
→ Indicated on display:
V.A.G - SELF DIAGNOSIS     HELP
     1 - Rapid data transfer*
     2 - Flash code output*

* Appears alternately

Note:

If the display remains blank:

=> Fault reader operating instructions

After the fault reader has been connected:

  • ‒ Depending upon desired function:
    Switch ignition on
         or
    Start engine , Table "Selectable functions".
  • ‒ Operate fault reader taking into account the information on the display:
  • ‒ Press key 1 for "Rapid data transfer".
  • ‒ Press keys 4 and 1 for address word "Diesel pump electronics" and confirm entry with Q key.
 
→ The fault reader V.A.G 1551 display will show the control unit identification, e.g.:
028906125A     N.A. Diesel FIA     V01     ⇒
  • ◆ 028906125A = Part No. of the control unit (for up-to-date control unit versions see parts catalogue)
  • ◆ N.A. Diesel FIA =Engine version
  • ◆ V01 = Control unit software version
  • ‒ Press the ⇒key.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Further measures see repair procedures.

Interrogating fault memory > < Technical data of self diagnosis