General Information

Automatic Transaxle
U0100 Lost Communication With ECM/PCM \'A\' - General Information

Component Location





General Description

Vehicle electonic control need many informations of each module to reduce exhaust and increase convenience/safety by optimum control. 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 communicaton is one of the vehicle communications method, which is now widely used to transfer the vehicle data.

DTC Description

This code is set when PCM/TCM detected that message is not received at communication line.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data




Fig 1) Wave form of "CAN COMMUNICATION"