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Mixture preparation system, electronic inj.,Gas > < Checking ignition transformer

Leon Mk1

Simos injection and ignition system
Self diagnosis
Interrogating and erasing fault memory

Special tools, testers and auxiliary items

  • ◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 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.

Work sequence

  • ‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and with the "Address word" 01 select the engine electronics control unit. When doing this the engine should be idling.
    (Connecting fault reader and selecting engine electronics control unit .)

Only when engine does not start:

  • ‒ Switch ignition on.
  • ‒ Switch on fault reader printer with the print key. The warning lamp in key must light up.
 
→ Indicated on display:
Rapid data transfer    HELP
Select function XX
  • ‒ Operate fault reader taking into account the information on the display:
  • ‒ Press keys 0 and 2 for function "Interrogate fault memory" and confirm entry with Q key.
 
→ The number of faults stored or "No fault recognised!" will be shown on the display.
X Faults recognised!

If one or more faults are stored:

The stored faults will be displayed and printed out one after the other.
 
→ After the stored faults have been printed out, the display will show:
Rapid data transfer    HELP
Select function XX
  • ‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
  • ‒ Eliminate the printed out faults using the appropriate fault table.
    => Page 01-12.
  • ‒ Interrogate the control unit fault memory again after rectifying faults.
  • ‒ Press keys 0 and 5 for the function "Erase fault memory" and confirm entry with Q key.

Note:

If the ignition is switched off between "Interrogate fault memory" and "Erase fault memory" the fault memory will not be erased.
 
→ Indicated on display:
Rapid data transfer    ⇒
Fault memory is erased!
  • ‒ Press the ⇒key.
  • ‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
  • ‒ Switch off ignition for at least 15 seconds.
  • ‒ Carry out road test of at least 5 minutes duration.
    When doing this
    • ‒ The coolant temperature must reach at least 60 °C,
    • ‒ The engine speed must be increased to at least 3000 rpm,
    • ‒ The accelerator pedal must be floored briefly.
  • ‒ Interrogate the control unit fault memory again. No faults should be displayed.

If no fault is stored:

  • ‒ Press the ⇒key.
 
→ Indicated on display:
Rapid data transfer    HELP
Select function XX
  • ‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.

Note:

If the self-diagnosis has not detected a fault, use the appropriate fault table in "Fault finding engine" binder for further fault finding.

Mixture preparation system, electronic inj.,Gas > < Checking ignition transformer