STEP 2. Check whether the DTC is set again.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
Is DTC U1015 set?
Replace the ACC/FCM-ECU [Refer to GROUP 17 - Adaptive Cruise Control System (ACC) ] and then go to Step 3. The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).