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.
The TCM reads data on the CAN-BUS line and checks whether the data is equal to the data which the TCM sentbefore. If the data is not the same the TCM decides that either the CAN-BUS line or TCM are malfuncting and sets this code.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Message Check |
•
Open or short in CAN line
•
Faulty ECM
•
Faulty TCM |
Enable Conditions |
•
IG "ON"
•
Battery Voltage > 10V
•
Input Speed > 300rpm | |
Threshold Value |
•
BUS OFF | |
Diagnostic Time |
•
More than 2sec. | |
Fail Safe |
•
Default value |
Fig 1) "CAN Communication"
