DTC C1638-08: ACC/SCC Communication Error: General Description

The AVSM (Advanced Vehicle Stability Management) is a safety function which prevents vehicle from crashing. In case of crashing it reduces damage from it through The ABS/ESP controlling braking force with SCC (Smart Cruise Control) system.

When a driver's vehicle is about to crash, SCC measures the distance from the car ahead and makes a decision accordingly.

The ABS/ESP stands by braking when collision hazard against the car next ahead is detected.

If collision is expected, The ABS/ESP brakes the vehicle even thought the driver doesn't press brake pedal by actuating motor to reduce damage of crash.

The ABS/ESP exchanges signals with ECM, TCM, SCC via CAN line in order to control AVSM properly.