General Information

Automatic Transaxle

U0001 High Speed CAN Communication Bus off - General Information

Component Location





General Description

The TCM can either receive data from the Engine Control Module or ABS control module, or it can send data to the ECM and ABSECM by using CAN communication. The CAN communication is one of the vehicle communications method, which is now widely used to transfer the vehicle data.

DTC Description

When the TCM cannot read the data from the ECU through the CAN-BUS line, the TCM sets this code.
CAN-BUS circuit malfunctioning or ECU can be a possible cause of this DTC.

DTC Detecting Condition





Diagnostic Circuit Diagram





Monitor Scantool Data








Fig 1) Input element of CAN : low speed driving
Fig 2) Input element of CAN : high speed driving