Tacoma PreRunner Dbl Cab 2WD V6-3.4L (5VZ-FE) (2001)
Seat Belt Reminder Lamp: Component Tests and General Diagnostics
INSPECT SEAT BELT WARNING LIGHT
a. Remove the body ECU connector from the No.1 J/B.
b. Ground terminal 19 on the wire harness side connector.
c. Turn the ignition switch ON and check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire harness.