Inspection Procedure
1: M.U.T.-III cannot communicate with ACC system is impossible.
COMMENTS ON TROUBLE SYMPTOM
When M.U.T.-III cannot communicate with the ACC system, the CAN bus lines, ACC/FCM-ECU power
supply circuit system, earth, or ACC/FCM-ECU may be faulty.
PROBABLE CAUSES
Damaged wiring harness and connectors
ACC/FCM-ECU malfunction
Wrong routing of M.U.T.-III harness
Abnormality in battery or alternator
Abnormality in power supply voltage to ACC/FCM-ECU