Toyota Prius 2011 Manual page 630

What to do if...
■ Warning lights
Master warning light
Charging system 
warning light
Malfunction indicator
lamp
or
Brake system warning
light (red indicator)
or
Brake system warning
light (yellow indicator)
Automatic headlight 
leveling system 
warning light
Open door warning 
light
SRS warning light
ABS warning light
or
*
: The light flashes to indicate a malfunction.
630
P. 509
P. 507
P. 507
P. 506
P. 507
P. 507
P. 509
P. 507
Front passenger's seat
belt reminder light
P. 507
Tire pressure warning
light
P. 509
Electric power steering
warning light
P. 507
Pre-collision system
*
warning light
P. 507
Slip indicator light
P. 507
*
"LKA" indicator light
P. 243
Cruise control indicator
*
light
P. 507
Radar cruise control 
*
indicator light P. 221
High coolant temperature
warning light P. 509
Low fuel level warning
light
P. 509
Driver's seat belt reminder 
light
P. 509
P. 509