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/TCM 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/TCM |
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"
