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Bosch EDC17C42, C45, C84 and ME17.9.20 (Renault, Dacia, Nissan, Smart): BSL connections and boot-mode-only ECUs

Connection diagrams for the Bosch ECUs of the Renault-Nissan camp and its Dacia, Smart and Renault trucks derivatives. This group includes one ECU that the manual lists as boot-mode only.

Procedure

1. Read the label and find the entry: EDC17C42 TC1767 (Renault, Dacia, Mercedes-Benz, Nissan, Opel, Renault trucks), EDC17C45 TC1767 BSL only (Renault, Nissan), EDC17C84 TC1782 Old and new (Dacia, FIAT, Nissan, Opel, Renault), ME17.9.20 TC1782 (Dacia, Renault, Smart).
2. If you have an EDC17C45, set the job up for boot mode straight away: the manual gives no other route for this ECU.
3. For the EDC17C42 use the base diagram and, for boot mode, the "BSL connection" given on the same page.
4. For the EDC17C84 compare the board against the Old version and new version drawings and pick the matching one.
5. Build the loom following the pins and colours in the drawing, then re-check every wire with the ECU unpowered.
6. Power the ECU on the bench, connect the AVDI and start the read from the software.
7. Save the file you read out as the original and keep it before any write.

Reference screenshots