volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Final control diagnosis > < Fault table
Mono Motronic injection and ignition system
Self-diagnosis
Erasing fault memory

Special tools, testers and auxiliary items

  • ◆ Fault reader V.A.G 1551 (or vehicle system tester V.A.G 1552) with
         ▸ 07.93: Cable V.A.G 1551/1
         08.93 ▸: Cable V.A.G 1551/3

Test conditions

  • ● Fault eliminated

Work sequence

  • ‒ Carry out road test of at least 10 minutes duration.
    When doing this
    • ‒ The coolant temperature must reach at least 80 °C,
    • ‒ The engine speed must be increased to at least 3000 rpm,
    • ‒ The accelerator pedal must be floored briefly.
  • ‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select engine electronics control unit (address word 01); selection is carried out with engine idling.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Input 02 for "Interrogate fault memory" function and confirm with Q.
 
→ Press ⇒key until all faults still stored have been displayed and the display reads:
Rapid data transfer     HELP
Select function XX
  • ‒ Input 05 for "Erase fault memory" function and confirm with Q.
  •  
    → Indicated on display:
    Rapid data transfer     ⇒
    Fault memory is erased!
    • ‒ Press ⇒ key.
     
    → Indicated on display:
    Rapid data transfer     HELP
    Select function XX
    • ‒ Input 06 for "End output" function and confirm with Q.
    • ‒ Carry out a further road test and interrogate fault memory again. No faults should be shown.

    Final control diagnosis > < Fault table