TCM (Transmission Control Module)
Hardware
transmission control computer — Manages automatic/DSG transmission shift logic. Separate from ECU but communicates via CAN. DaVinci has limited TCM tuning (DSG shift points, lockup).
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ECU (Engine Control Unit)
main engine computerDSG (Direct-Shift Gearbox)
VAG dual-clutch automatic transmissionTricore
Infineon microcontroller family used in Bosch ECUsSPI (Serial Peripheral Interface)
low-level chip-to-chip protocolEEPROM
small persistent memory chipTCU (Transmission Control Unit)
transmission control module
main engine computerDSG (Direct-Shift Gearbox)
VAG dual-clutch automatic transmissionTricore
Infineon microcontroller family used in Bosch ECUsSPI (Serial Peripheral Interface)
low-level chip-to-chip protocolEEPROM
small persistent memory chipTCU (Transmission Control Unit)
transmission control module