Comments On Trouble Symptom
WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
When scan tool (M.U.T.-III) cannot communicate with the ACC system, the CAN bus lines, ACC/FCM-ECU power supply circuit system, ground, or ACC/FCM-ECU may be faulty.