DTC U0101-00: Can Communication: Communication Error To TCM (At-Bus)

WARNING: <<High voltage>>

If the necessary measures are not taken before servicing an electric vehicle, it could cause electrical shock and result in serious injury or, in the worst case, death. Before servicing the electric vehicle, refer to [HIGH VOLTAGE SERVICE CAUTIONS ] in the general information and implement the necessary measures. (Refer to [HIGH VOLTAGE SERVICE CAUTIONS ] in service information).

U0101-00: (SGC2/DMCM (E-SKYACTIV PHEV)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	CAN communication: communication error to TCM (AT-bus)
Detection condition	Communication error between the TCM and drive motor control module continues.
Fail-safe	Not applicable
Possible cause	WARNING: <<High voltage>> If necessary measures such as wearing the correct protective gear are not taken when inspecting or removing/installing the high voltage parts, it could cause electrical shock and result in serious injury or, in the worst case, death. Before inspecting or removing/installing the high voltage parts, refer to [HIGH VOLTAGE SERVICE CAUTIONS ] in the general information and [High Voltage Part Inspection and Removal/Installation Notes] of the high voltage system service cautions and implement the necessary measures and preparations. (Refer to [HIGH VOLTAGE SERVICE CAUTIONS ] in service information). (Refer to [HIGH VOLTAGE SYSTEM SERVICE CAUTIONS ] in service information). Wear insulated gloves when working on a high voltage system. Malfunction in wiring harness (including connector/terminal) between TCM and drive motor control module (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) TCM malfunction (Refer to [CONTROL VALVE BODY REMOVAL/INSTALLATION ] in service information). Drive motor control module malfunction (Refer to [INVERTER REMOVAL/INSTALLATION ] in service information).
Repeatability verification procedure	Clear the DTC recorded in the memory. (See CLEARING DTC .) Switch the main power ON (READY on).
Courtesy of MAZDA MOTORS CORP.
1	Drive motor control module
2	TCM