Failing to investigate the cause of the following warnings may lead to the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Toyota dealer immediately.


Stop the vehicle immediately.
Follow the correction procedures.Precaution
PRECAUTION
1. PRECAUTION FOR DISCONNECTING BATTERY CABLE
NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize
the following systems after the cable is reconnected.
System
See Procedure
...
System Diagram
SYSTEM DIAGRAM
Communication Table
Transmitting ECU (Transmitter)
Receiving ECU (Receiver)
Signal
Line
Certification ECU
(Smart key ECU assembly)
Main body ECU
(Driver side junc ...
Lost Communication with Clearance Warning ECU (U1110)
DESCRIPTION
DTC Code
DTC Detection Condition
Trouble Area
U1110
No communication from the clearance warning ECU assembly continues.
Clearance warning ECU assembly branch wire o ...