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Interrogating fault memory > < Technical data of self diagnosis

Passat (B3)

Mono-Motronic Injection and Ignition system
Self diagnosis
Connecting fault reader V.A.G 1551 and selecting engine electronics control unit
 
N29-0002
  • ● Battery voltage OK.
  • ● Fuse 22 OK.
  • ● Earth connections on engine and gearbox OK.
    (Earth connection engine: on cylinder head).
  • ‒ → Unclip cover for diagnostic connections.
  • ‒ Connect fault reader V.A.G 1551 with cable V.A.G 1551/3.
  • ‒ 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 01 for address word "Engine electronics" and confirm with Q.
 
→ The fault reader V.A.G 1551 display will show the control unit identification, e.g.:
8A0907311K     1.8 l R4     MONO 1.2.3     D51 ⇒
Coding 01
  • ◆ 8A0 907 311K = Part No. of the control unit (for up-to-date control unit versions see parts catalogue)
  • ◆ 1.8 ltr. = Engine capacity
  • ◆ R4 = Type of engine (4 Cyl. in-line engine)
  • ◆ MONO = Injection system (Mono-Motronic)
  • ◆ D51 = Control unit software version
  • ◆ Coding 01 = Coding variants (01 for manual gearbox)
  • ‒ Press ⇒ key.
 
→ Indicated on display:
Rapid data transfer     HELP
Select function XX
  • ‒ Further measures see repair procedures.
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Interrogating fault memory > < Technical data of self diagnosis