The TCM can either receive data from the Engine Control Module or ABS control module, or it can send data to the ECM and ABSCM by using CAN communication. The CAN communicaton is one of the vehicle communications method, which is now widely used to transfer the vehicle data.
When the TCM cannot read the data from the ECM through the CAN-BUS line, the TCM sets this code..
CAN-BUS circuit malfunctioning or ECM can be a posssible cause of this DTC.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Monitoring ID from ECU
? Open or Short in CAN communication harness
? Faulty TCM
Enable Conditions
? 200msec passed after IG ON
Threshold Value
? No message from ems.
Diagnostic Time
? More than 0.2sec
Fail Safe
? INTELLIGENT SHIFT and learn control are inhibited.
? Torque reduction control is inhibited.