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Bosch MED17.1 and MED17.1.x (Audi, Volkswagen, Porsche, Bentley, Lamborghini): bench and BSL connections

Strumenti Interface Classic Hardware / Connections Advanced ⏱ 30-60 min 7 steps

The diagrams for the MED17.1 petrol ECUs of the VAG group, from Audi and Volkswagen units with TC1796 through to Porsche, Bentley and Lamborghini with TC1797 and the Audi MED17.1.61/1.62 MASTER TC1793.

Required licences

  • —

Hardware / cables

  • AVDI
⚠ WarningUnder the same MED17.1.1 designation the manual covers two different ECUs: MED17.1.1 TC1796 (Audi, Volkswagen), which comes in no fewer than three board layouts (Version 1, 2 and 3), and MED17.1.1 TC1797 (Audi, Bentley, Lamborghini, Porsche), with its own diagram. Identify the microcontroller and the board version before you connect anything.

Procedure

  1. Note the designation and make from the label, then find the entry in the manual: MED17.1 TC1796 (Volkswagen, Audi), MED17.1.1 TC1796 (Audi, Volkswagen), MED17.1.1 TC1797 (Audi, Bentley, Lamborghini, Porsche), MED17.1.6 TC1797 (Audi, Porsche, Volkswagen), MED17.1.10 TC1793 (Audi), MED17.1.11 TC1797 (Porsche), MED17.1.21 TC1793 (Audi, Volkswagen), MED17.1.27, MED17.1.61 MASTER TC1793 (Audi), MED17.1.62 MASTER TC1793 (Audi).
  2. Read the microcontroller straight off the Tricore chip on the board and compare it with the one named in the entry heading.
  3. If you have a MED17.1.1 TC1796, compare the PCB against the Version 1, Version 2 and Version 3 drawings and pick the matching one; the same section also holds the "BSL connection" diagram for boot mode.
  4. Build the loom following the chosen drawing exactly: pin numbering and wire colours as per the manual.
  5. On MED17.1.61 and MED17.1.62 make sure you are working on the MASTER section indicated by the manual, not on another processor on the same board.
  6. Power the ECU on the bench with a stable supply and connect the AVDI.
  7. Start the read from the software, save the original file and archive it before any write.

Reference screenshots

Bosch MED17.1 and MED17.1.x (Audi, Volkswagen, Porsche, Bentley, Lamborghini): bench and BSL connections — 1Bosch MED17.1 and MED17.1.x (Audi, Volkswagen, Porsche, Bentley, Lamborghini): bench and BSL connections — 2Bosch MED17.1 and MED17.1.x (Audi, Volkswagen, Porsche, Bentley, Lamborghini): bench and BSL connections — 3Bosch MED17.1 and MED17.1.x (Audi, Volkswagen, Porsche, Bentley, Lamborghini): bench and BSL connections — 4Bosch MED17.1 and MED17.1.x (Audi, Volkswagen, Porsche, Bentley, Lamborghini): bench and BSL connections — 5
Source: Manuale ECU Programming Tool, parte 2 di 3, sezioni BOSCH MED17.1.x (p.92-96) · ⏱ estimated time 30-60 min
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