The SCC is the shorten word of Smart Cruise Control system. This system has a radar sensor on a vehicle and the SCC ECU calculates the distance between cars going in the same direction by the radar sensor. So this SCC system enables a vehicle to drive with maintaining the constant distance from the car ahead or at a constant vehicle speed. The HECU exchanges signals with SCC ECU through CAN communication.
The HECU monitors CAN messages for a normal operation and if the invalid messages from TCM are detected, this DTC is set.
Item
Detecting Condition
Possible Cause
DTC Strategy
CAN message monitoring
A fault in the TCM system side
Poor connection of CAN communication circuit
Threshold valve
When an invalid message from TCM is detected
Fail-Safe
The SCC function is inhibited.