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.Data Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter
DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound data signal or image data
signal from a USB device to the navigation receiver assembly via this circuit.
WIRING DIAGRAM
PROCEDURE
1.
CHECK HARNESS AND CONNECTOR ( ...
Check Mode Procedure
CHECK MODE PROCEDURE
1. CHECK MODE (SIGNAL CHECK): DTC CHECK
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / SRS Ai ...
System Diagram
SYSTEM DIAGRAM
1. CAN AND DIRECT LINE SIGNALS
2. INPUT AND OUTPUT SIGNALS OF THE ACCESSORY METER ASSEMBLY
Warning light or indicator light
Communication Signal
Receiver
Communication Line
Sender
...