The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Toyota dealer.

If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately.Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter
DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound signal from an external
device to the navigation receiver assembly via this circuit.
The sound signal that has been sent is amplified by the navigation receiver assembly
and then is sent ...
Horn
Components
COMPONENTS
ILLUSTRATION
Inspection
INSPECTION
PROCEDURE
1. INSPECT LOW PITCHED HORN ASSEMBLY
(a) Apply battery voltage and check the operation of the low pitched
horn assembly according to the table below.
OK:
...
Installation
INSTALLATION
PROCEDURE
1. INSTALL STEREO COMPONENT TUNER ASSEMBLY
2. INSTALL NAVIGATION WIRE
(a) Connect the 3 connectors to install the navigation wire.
3. INSTALL STEREO COMPONENT TUNER ASSEMBLY WITH WIRE
(a) Install the stereo component tuner assembly ...