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 & Limp Home | Possible Cause |
DTC Strategy | ● Range check | ● Open or Short in CAN communication harness ● Defective ECM ● Defective TCM |
Enable Conditions | ● IG switch on ● No actuator test from HI-SCAN ● No FAIL status of gear position 3 Hold ● No PG-A,B FAIL ● Power voltage ≥ 10V is detected for a series of 0.5 sec ● Engine STOP, no ( Input Sensor speed ＜100rpm) | |
Threshold Value | ● BUS OFF information is recived from CAN MI-COM | |
Diagnostic Time | ● 0.5sec | |
Fail Safe | ● Suspend transmission or receipt for TCU ● Prohibit INTELLIGENT SHIFT ● Prohibit learning for oil pressure control ● Prohibit Torque Retard requirement. ● Prohiblt direct connection control |
