The TJA1051T/3/1J CAN transceiver is a crucial component in vehicle and industrial applications for communication between electronic control units (ECUs). However, like any advanced technology, signal loss in the CAN transceiver can occur, leading to system malfunction and communication errors. This article explores the causes of signal loss in the TJA1051T/3/1J CAN transceiver and outlines effective diagnosis and repair methods to ensure optimal functionality.