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 sent before. 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 & 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 | ● In case of no ECU information.(ID 316,329,545) | |
Diagnostic Time | ● 1.5sec | |
Fail Safe | ● It is possible for TCU to receive message. ● Prohibit INTELLIGENT SHIFT ● Prohibit learning for oil pressure control ● Prohibit Torque Retard requirement. ● Prohiblt direct connection control |
