Toyota 2013 Avalon Hybrid Owner's Manual page 71

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2. Instrument cluster
* 1
: These lights turn on when the power switch is turned to ON mode to indi-
cate that a system check is being performed. They will turn off after the
hybrid system is started, or after a few seconds. There may be a malfunc-
tion in a system if the lights do not come on, or do not turn off. Have the
vehicle inspected by your Toyota dealer.
* 2
: The light flashes to indicate a malfunction.
AVALON_HV_U (OM41451U)