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Interrogating and erasing fault memory > < Technical data of self-diagnosis

A3 Mk1

Simos Injection and Ignition System (4-cylinder)
Self-odiagnosis
Connecting fault reader V.A.G 1551 and selecting engine electronics control unit
 
A01-0001

Note:

Vehicle system tester V.A.G 1552 can be used instead of fault reader V.A.G 1551. However, printouts cannot be made.

Test conditions

  • ● Battery voltage at least 11 V.
  • ● Earth connections on engine and gearbox OK.
  • ● Fuse OK.
  • ‒ → Unclip cover for diagnostic connections.
  • ‒ Connect fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3.
 
→ Display readout:
V.A.G - SELF-DIAGNOSIS    HELP
    1 - Rapid data transfer
    2 - Flash code output

Note:

If using V.A.G 1551 and test cards with program levels from -D/5.0- onwards the engine control unit can be selected directly via "Rapid data transfer". The self-diagnosis function can be used with program levels from -D/5.4- onwards.

Note:

If the display remains blank:

=> Fault reader operating instructions

Depending on the function required:

  • ‒ Switch the ignition on.
  • or
  • Start the engine , table "Available Functions".
  • ‒ Switch on printer with the Print button
    (warning lamp in button lights up).
  • ‒ Press key 1 for "Rapid data transfer".
 
→ Display readout:
Rapid data transfer     HELP
Enter address word    XX

 
→ Press keys 0 and 1 for address word "Engine electronics" and confirm entry by pressing the Q key.
Rapid data transfer     Q
01 - Engine electronics
 
→ If the display shows one of the messages reproduced here, run through the fault finding procedure as described in the Fault Finding Programme for diagnosis wiring.
Rapid data transfer     HELP
Control unit does not answer
 
=> Current Flow Diagrams, Electrical Fault Finding and Fitting Locations
Rapid data transfer     HELP
Fault in communication build up
 
Rapid data transfer     HELP
K wire not switching to earth
 
Rapid data transfer     HELP
K wire not switching to positive
 
→ The display on fault reader V.A.G 1551 will show one of the two possible control unit identification codes. For example:
06A906019D    SIMOS 2    HSXXXX⇒
Coding 0000    WSC XXXXX
  • ◆ 06A 906 019 D = Part No. of the control unit (for latest control unit version, see Parts List)
  • ◆ SIMOS 2 = system designation and version
  • ◆ HSXXXX = programme level number for manual gearbox
  • ◆ ATXXXX = programme level number for automatic gearbox
  • ◆ Coding 00000 = coding variant
  • ◆ WSC = workshop code
 
→ Or:
06A906019D    1.6l R4/2V SIMOS HS D01 ⇒
Coding 00000    WSC XXXXX
  • ◆ 06A 906 019 D = Part No. of the control unit (for latest control unit version, see Parts List)
  • ◆ 1.6 ltr. = engine capacity
  • ◆ R4/2V = engine type (in-line engine, 4-cyl., 2 valves per cylinder)
  • ◆ SIMOS = designation of injection and ignition system
  • ◆ HS = manual gearbox (hand shift)
    AT = automatic gearbox
  • ◆ D = data level (hardware and software versions) of control unit
  • ◆ Coding = coding variant of control unit
  • ◆ WSC = workshop code

If the coding differs from the vehicle version, then:

  • ‒ Check control unit coding => Page 01-57.
    Coding Simos control unit
  • ‒ Press the ⇒key.
 
→ Display readout:
Rapid data transfer     HELP
Select function XX

Note:

Press the HELP key to obtain a printout of the available functions.

Interrogating and erasing fault memory > < Technical data of self-diagnosis