Toyota 4Runner: System Description

Door control transmitter

Door control receiver

Receives weak electric waves (recognition codes and function codes) from the door control transmitter via the electrical key antenna and changes the waves to code data.

Front door courtesy light switch

Rear door courtesy light switch

Back door courtesy light switch

Turns on when the door is opened and off when the door is closed. Outputs the door status (open or closed) to the main body ECU.

Door lock position switch

Transmits the door lock positions of each door to the main body ECU.

Wireless door lock buzzer

Sounds when the door ajar warning function is operating.

Certification ECU

Matches the code data with the registered code and outputs the code data to the main body ECU.

All door lock function

Pressing the lock switch locks all the doors.

All door unlock (Unlock 2 operation)

Pressing the unlock switch twice within 3 seconds unlocks all the doors after the driver door is unlocked.

Chattering prevention function

If a switch is pressed, the corresponding switch operation is performed once. If a switch is held down, the corresponding switch operation occurs only once and does not repeatedly activate. When pressing a switch at 1 second intervals, the corresponding operation activates once for every press of the switch.

Answer-back function

Automatic lock function

If no doors are opened within 60 seconds after they are unlocked by the door control transmitter, all the doors lock again automatically.

Illuminated entry function

Door ajar warning function

If any door is open or ajar, pressing the lock switch causes the wireless door lock buzzer to sound for approximately 5 seconds.

Panic alarm function

Pressing the panic switch of the transmitter for more than approximately 0.8 seconds causes the following alarms to activate:

While the panic alarm is operating, pressing any switch of the transmitter cancels the alarm operation.