Toyota Sienna 2010 Owner's Manual page 174

2-2. Instrument cluster and information display
Instrument panel light control
The brightness of the instrument panel lights can be adjusted.
NOTICE
To prevent damage to the engine and its components
■
Do not let the indicator needle of the tachometer enter the red zone, which
●
indicates the maximum engine speed.
The engine may be overheating if the engine coolant temperature gauge is
●
in the red zone (H). In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. (
176
Darker
Brighter
Optitron type meters only:
When the headlight switch is
turned on, the brightness will
be reduced slightly unless the
control button is turned fully
clockwise.
→
P. 536)