VW Passat & Audi A4 1990-2000

Clearing Codes

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The VAG1551/VAG1552 scan tool, with VAG1551/3 adapter cable, is required to erase the diagnostic trouble codes (DTCs) from the ECM memory.

  1. Connect the scan tool to the diagnostic connector and press buttons "0" and "1" to insert "Engine Electronics: Address Word 01" (engine running at idle).
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  3. Press buttons "0" and "2" to select "Check DTC Memory: Function 02".
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  5. Press the "Q" button to confirm input.
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  7. Press the button to advance through program sequence until all stored malfunctions have been displayed.
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  9. Press buttons "0" and "5" to select "Erase DTC Memory: Function 05".
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  11. Press the "Q" button to confirm input.
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  13. Press the button to advance through program sequence.
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  15. Press buttons "0" and "6" to select "End Output: Function 06".
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  17. Press the "Q" button to confirm input.
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  19. Road test the vehicle to ensure all problems have been repaired.
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  21. Initiate the "Automatic Test Sequence" by pressing the "0" button twice to insert "Address Word 00".
  22.  
  23. Check the readiness code. If the DTC memory has been erased, or ECM has been disconnected, generate a readiness code.
  24.  

 
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