Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Stop light switch circuit / Circuit description
Toyota Corolla (E120): Circuit description
This signal is used to detect that the brakes have been applied. The stp signal voltage is the same as the one supplied to the stop lights.
The stp signal is used mainly to control the fuel cut–off engine speed (the fuel cut–off engine speed is reduced slightly when the vehicle is braking.).
Wiring diagram

Other materials:
Fastening and releasing
the seat belt
To fasten the seat belt, push
the plate into the buckle until
a click sound is heard.
To release the seat belt,
press the release button A.
■Emergency locking retractor
(ELR)
The retractor will lock the belt during
a sudden stop or on impact. It may
also lock if you lean forward too
quickl ...
Fuel pump shut off system
To minimize the risk of fuel leakage when the engine stalls or when an airbag
inflates upon collision, the fuel pump shut off system stops the supply of fuel
to the engine.
Follow the procedure below to restart the engine after the system is activated.
► Vehicles without a smart key syst ...
Brake fluid
■ Checking fluid level
The brake fluid level should be between the “MAX” and “MIN” lines on the tank.
■ Adding fluid
Make sure to check the fluid type and prepare the necessary item.
1 Slide and lift up the rubber strip to partially remove it as shown.
2 Disconnect the ...


