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.
The fail-safe function is probably cancelling cruise control system. In this case, checking the cruise control system, MFI system, CAN bus system and transaxle system diagnostic trouble codes. The scan tool (M.U.T.-III) can also be used to check if the circuits of each input switches are normal or not by checking the data list.
NOTE:
Press the cruise control switches one by one securely. Otherwise, the cruise control system may not be started.