Inspection Procedure
1: M.U.T.-III cannot Communicate with FCM System.
caution
When the ACC/FCM-ECU is replaced,
calibrate the radar (refer to ).
COMMENTS ON TROUBLE SYMPTOM
When M.U.T.-III cannot communicate with the FCM 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
Malfunction of the ACC/FCM-ECU
Wrong routing of M.U.T.-III harness
Abnormality in battery or alternator
Abnormality in power supply voltage to ACC/FCM-ECU
).