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.
This code is set when PCM detected that message is not received at communication line.
Item
Detecting Condition
Possible Cause
DTC Strategy
No message from ECM
Open or Short in CAN communication harness
PCM
Enable Conditions
Time after TCM turns on >0.5sec
Input speed > 400rpm
Threshold value
Message from ECM No message
Detecting Time
More than 2sec
Fail safe
Engine speed:3000rpm
Throttle : 50%
Engine torque : Max*0.7
* Inhibit TIME OUT happen at BUS OFF happen.
Fig 1) Wave form of "CAN COMMUNICATION"