Toyota Yaris Owner's Manual page 104

Service reminder indicators and warning buzzer
If the indicator or buzzer comes on...
(a)
(b)
(Indicator and buzzer)
(c)
(Indicator and buzzer)
(d)
(e)
(f)
If parking brake is off, stop immediately and contact Toyota dealer.
Fasten driver's seat belt.
Fasten front passenger's seat belt.
Stop immediately and contact Toyota dealer.
Stop and check.
Take vehicle to Toyota dealer.
Do this.
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