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Home >> Volvo >> 2021 >> XC40 T4 R-Design >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Transmission - Design >> Transmission Control Module >> Transmission Control Module (TCM) (4/28) [2019-2022, TG-81SC | 2018-2022, TG-81SC AWD] >> Connection And Communication
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Connection And Communication

The Transmission Control Module (TCM) on a TG-81 gearbox is a LIN master and a CAN slave. It is connected to both the Propulsion CAN and a private CAN, together with the Engine Control Module (ECM), for redundancy.

The TCM on an 8G gearbox is a CAN slave. It is connected to both Front 1 CAN and Front 3 CAN for redundancy.