Hello! Fault code U0073 Indicates that the communication bus of the control module is disconnected. The condition for generating a fault code is that the control module attempts to establish communication on the serial data circuit for more than three times within 5s. The causes of the fault are as follows: The TCM (Gateway receiving transmission) power supply or the rail is suddenly interrupted during running, resulting in the TCM control module stops working.
When the CAN communication enabling line of TCM control module is suddenly disconnected or the voltage is too low, the CAN BUS communication of TCM control module is interrupted. The TCM control module is faulty. Procedure