The emergency flashers are used to warn other drivers when the vehicle has to be stopped in the road due to a breakdown, etc.
Operating instructions
Press the switch.
All the turn signal lights will flash.
To turn them off, press the switch once again.

â– Emergency flashers
The emergency flashers will turn off automatically after operating for approximately 20 minutes. To manually turn the emergency flashers off, press the switch twice. (The emergency flashers may not turn on automatically depending on the force of the impact and conditions of the collision.)
If your vehicle has to be stopped in an emergencyDisposal
Hint:
When scrapping a vehicle equipped with srs or disposing of
the front seat side airbag, be sure to deploy the airbag first in
accordance with the procedure described below. If any
abnormality occurs with the airbag deployment, contact the
service dept. Of toyota motor sales, u.S.A., Inc.
...
Installation
Install knock sensor
Install the sensor with the nut.
Torque: 20 n*m (205 kgf*cm, 15 ft.*Lbf)
Notice:
Make sure that the knock sensor is in the
correct position.
Connect the sensor connector.
Install intake manifold insulator
install the intake manifold insulat ...
Transmission fluid temperature sensor "A" circuit
Description
The automatic transmission fluid (atf) temperature sensor converts the atf
temperature into a
resistance value which is input into the ecm.
The ecm applies a voltage to the temperature sensor through ecm terminal tho1.
The sensor resistance changes with the atf temperature. ...