AutoVEI – D2351S0060 – MB CPC4 Read / Write by OBD, DC, BSL (TC1796)

Automotive ECUs like the Infineon TC1796 can be accessed in several ways, depending on the security and the tool support:

🔹 1. OBD (On‑Board Diagnostics) Port

• Standard diagnostic interface (usually pin‑connector in car)

• Allowed for reading generic data and authorized flash if the ECU permits it

• Used by commercial tuning tools (with proper security protocols)

• Not all ECUs allow full read/write via OBD without security unlock

🔹 2. DC (Diagnostic Connector)

• A manufacturer diagnostic mode used by OEM tools

• Provides deeper access than generic OBD

• May require dealer software and login credentials

• Access level depends on security/authentication

🔹 3. BSL (Boot‑Strap Loader)

• Physical low‑level interface directly on the board

• Often requires opening the ECU and connecting to test pads

• Allows full flash read/write regardless of on‑vehicle security

• Used when OBD access is locked or blocked

• Requires soldering/programmer hardware