CAN Communication The adaptive cruise control (ACC) unit is on the F-CAN, and it communicates with other units via the F-CAN. If the adaptive cruise control (ACC) unit detects a communication error or a malfunction in another connected unit, the adaptive cruise control (ACC) system will not operate even though it is OK.
In this case, both the adaptive cruise control (ACC) indicator and the related unit indicator will come on and stay on.