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Fault table > < Coding control unit

Passat (B3)

Motronic fuel injection and ignition system ä 07.95
Self-diagnosis
Interrogating fault memory
  • ‒ Connect fault reader V.A.G 1551 and select engine electronics control unit (address word 01); selection is carried out with engine idling.

Only when engine does not start:

  • ‒ Operate starter for approx. 6 seconds and then do not switch off the ignition.
  • ‒ Switch on printer with the Print button
    (Warning lamp in button lights up).
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Input 02 for "Interrogate fault memory" function and confirm with Q.
 
→ The number of faults stored or "No fault recognised!" will be shown on the display.
X Faults recognised!

Note:

If something different is indicated on the display:

=> Fault reader operating instructions

If one or more faults are stored:

The faults stored will be displayed and printed out one after the other.
Then the display will show:

If no fault is stored:

  • ‒ Press ⇒ key.
  • ‒ Input 06 for "End output" function and confirm with Q.
  • ‒ Locate and eliminate faults printed out as per fault table => Page 01-10 .
  • ‒ Erasing fault memory => Page 01-34

Note:

If a fault is present which is not recognised by the self diagnosis, carry out further fault finding using the fault table in "Engine fault finding" binder.

Fault table > < Coding control unit