Toyota Highlander Owners Manual: Maintenance and care

Maintenance and care

...

Cleaning and protecting the vehicle exterior

Perform the following to protect the vehicle and maintain it in prime condition: Working from top to bottom, liberally apply water to the vehicle body, wheel wells and underside of the vehicle ...

More about Toyota Highlander:

If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights comes on or flashes. If a light comes on or flashes, but then goes off, this does not necessarily indicate a malfunction in the system. However, if this continues to occur, have the vehicle inspected by your toyota dealer. Warnin ...