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Interrogating fault memory > < Technical data of self diagnosis

Golf 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
 
N29-0003
  • ● Battery voltage OK.
  • ● Fuse 21 OK.
  • ● Earth connections on engine and gearbox OK.

Work sequence

  • ‒ → Unclip cover for diagnostic connections.
  • ‒ Connect fault reader V.A.G 1551 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

  • ‒ Depending upon desired function:
    Switch on ignition
         or
    Start engine.
  • ‒ Operate fault reader taking into account the information on the display:
  • ‒ Input 1 for "Rapid data transfer".
  • ‒ Input 41 for address word "Diesel pump electronics" and confirm with Q key.
 
→ The fault reader V.A.G 1551 display will show the control unit identification, e.g.:
028906124B Turbo Diesel      V02 ⇒
Coding 00127     WSC0000
  • ◆ 028906124B = Part No. of the control unit (for up-to-date control unit versions see parts catalogue)
  • ◆ Turbo diesel = engine version
  • ◆ D40 = Control unit software version
  • ◆ Coding: 127 without air conditioner, 124 with air conditioner
  • ◆ WSC...Dealership number of the V.A.G dealer
  • ‒ Press ⇒ key.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Further measures see repair procedures.

Interrogating fault memory > < Technical data of self diagnosis