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.Removal
REMOVAL
CAUTION / NOTICE / HINT
NOTICE:
Do not replace the spiral cable with the battery connected and the ignition
switch ON.
Do not rotate the spiral cable without the steering wheel with the battery
connected and the ignition switch O ...
Poor Sound Quality in All Modes (Low Volume)
PROCEDURE
1.
CHECK AUDIO SETTINGS
(a) Set treble, middle and bass to the initial values and check that the sound
is normal.
OK:
The sound returns to normal.
HINT:
Sound quality adjustment measures vary according to the ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
The main body ECU (driver side junction block assembly) and certification ECU
(smart key ECU assembly) control the LIN communication system. LIN communication
system data and Diagnostic Trouble Codes (DTCs) can be read thr ...