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Measured value blocks > < Readiness code

Leon Mk1

Motronic injection and ignition system (1.8 l engine)
Fault memory
Automatic test sequence

During test and assembly work faults can be recognised from other control units like e.g. plug disconnected. Therefore on completion the fault memories of all control units must be interrogated and erased. To do this:

  • ‒ Press key 0 twice for address word "Automatic test sequence" and confirm entry with Q key. The V.A.G 1551 transmits all known address words one after the other.

When a control unit answers with its identification the number of stored faults appears on the display or "No fault recognised".

Any system faults that are stored will be displayed one after the other and printed out. The V.A.G 1551 will then transmit the next address word.
 
→ The automatic test sequence has ended when following is indicated on display:
V.A.G SELF-DIAGNOSIS    HELP
1 - Rapid data transfer*
2 - Flash code output*
  • ‒ Erase all fault memories and then carry out a road test.
  • During the road test the following operating conditions must be fulfilled:
    • ‒ The coolant temperature must exceed 80 °C .
    • ‒ When the temperature is reached, the operating conditions
          Idling
          Part throttle
          Full throttle
          Overrun
      must be attained several times.
    • ‒ At full throttle the speed must exceed 3500 rpm.
  • ‒ Again interrogate the fault memories of all control units using the "automatic test sequence".

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 function "End output" and confirm entry with the Q key.

Measured value blocks > < Readiness code