Hint:

Initialization
Terminals of ecuFootwell light
On-vehicle inspection
Inspect footwell light
Connect the battery's positive (+) lead to terminal 2
and the negative (-) lead to terminal 1, then check
that the light comes on.
Ok:
light comes on.
If the result is not as specified, replace the light. ...
Light bulbs
You may replace the following bulbs by yourself. The difficulty
level of replacement varies depending on the bulb. If necessary
bulb replacement seems difficult to perform, contact your
toyota dealer.
For more information about replacing other light bulbs, contact
your toyota dealer.
Prepari ...
Driving in vehicle-to-vehicle distance control mode
This mode employs a radar to detect the presence of vehicles up to
approximately 328 ft. (100 m) ahead, determines the current vehicle-to-
vehicle following distance, and operates to maintain a suitable following
distance from the vehicle ahead. The desired vehicle-to-vehicle
distance can also be se ...