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.
When the TCM cannot read the data from theECU through the CAN-BUS line, the TCM sets this code.
CAN-BUS circuit malfunctioning or ECU can be a posssible cause of this DTC.
Item
Detecting Condition
Possible Cause
DTC Strategy
Check the communication
Short or Open in CAN communication circuit
Faulty in ECU
Enable Conditions
IG ON
10.2V < Battery voltage < 15.5V
No fail in system
Threshold Value
Detccting abnormal information.
Diagnostic Time
More than 0.5sec
Fail Safe
No self learning control
Engine speed = 7000rpm
Accel = 0%
Engine torque = maximum torque
Fixed at 3rd gear
Kick-down = "OFF"
Brake switch = "ON"
Wheel speed sensor = Output speed sensor
Engine coolant temperature = 80?
Fig 1) Input element of CAN : low speed driving
Fig 2) Input element of CAN : high speed driving