Shift Interlock System
WARNING: This page does not describe the selected car, but rather 45 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sienna, 2002 Toyota Sequoia, and 2002 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
With ignition on and brake pedal depressed, an input signal is sent from brakelight switch to ECU. With gearshift lever in Park, an input signal from shift control switch is input to ECU, indicating gearshift lever is in Park. ECU then operates shift interlock solenoid, allowing gearshift lever movement from Park.