Brake System Warning Light - Toyota 4Runner 2003 Operating Manual

If the indicator or buzzer comes on...
(h)
or
(i)
(j)
(k)
(l)
(m)
116
'03 4Runner_U (L/O 0211)
Replace engine oil.
Take vehicle to Toyota dealer. If brake system warning light is also on, stop
immediately and contact Toyota dealer.
Take vehicle to Toyota dealer.
Close all side doors and back door.
Take vehicle to Toyota dealer immediately.
Stop and check.
2003 4RUNNER from Oct. '02 Prod. (OM35804U)
Do this.