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Home >> Scion >> 2009 >> xB Automatic >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Lock Control System >> System Description

System Description

  1. POWER DOOR LOCK CONTROL SYSTEM DESCRIPTION 
    1. The power door lock system locks/unlocks all the doors. The master switch and the door control switch on the passenger door send lock/unlock request signals to the main body ECU. Then, the main body ECU sends these request signals to the lock motors in each door to lock/unlock all the doors at once in response to the inputs. Operating the driver's door lock using a mechanical key sends lock/unlock request signals to the main body ECU via the master switch. "2-step unlock function" is optional for the key-linked lock on the driver side door.
  2. BACK DOOR OPENER SYSTEM DESCRIPTION 
    1. The back opener is an electric type.
    2. The main body ECU activates the back door lock motor when the ON signal from the back door opener switch is received.
  3. FUNCTION OF MAIN COMPONENT 
    FUNCTION OF MAIN COMPONENT

    Components Function
    Power Window Regulator Master Switch Door control switch on master switch lock/unlocks all doors.
    Door Control Switch Door control switch on passenger side door locks/unlocks all doors
    Door Courtesy Light Switch Placed on each door Detects door status (open or closed) and outputs data to main body ECU Turns on when door is open and turns off when door is closed
    Front Door Lock Motor
    • Motor locks/unlocks door
    • Built-in door key lock and unlock switch (key-linked) detects door key operation's door status (locked or unlocked) and outputs data to main body ECU
    • Built-in detection switch detects door status (locked or unlocked) and outputs data to main body ECU This switch turns off when door is locked and turns on when door is unlocked
    Rear Door Lock Motor
    • Motor locks/unlocks door
    • Built-in detection switch detects door status (locked or unlocked) and outputs data to main body ECU This switch turns off when door is locked and turns on when door is unlocked
    Back Door Opener Switch Assembly When the switch is pushed, an opener switch ON signal is sent to the main body ECU
    Back Door Lock Motor Operates when signals from the main body ECU are received
    Back Door Courtesy Switch (built into back door lock motor) Detects the back door open/close condition signal to the main body ECU
  4. SYSTEM FUNCTION 

    HINT:

    The following functions' default settings are ON. Some of these functions can be customized (see CUSTOMIZE PARAMETERS  ).

    1. This system is controlled by the main body ECU. The main body ECU outputs signals to each door lock motor. The door lock control system in the vehicle has the following functions:
      FUNCTION OUTLINE

      Function Outline
      Manual Lock and Unlock Function Lock / unlocks all doors by door control switch's lock operation (manual operation)
      Back Door Open Function Open back door by back door opener switch ON
      One-motion Open When the door is locked, this function enables the door to be unlocked by merely pulling the inside handle lever of the door
      Key-linked Lock This function, which is linked with the key cylinder, can lock all the doors when a lock operation is effected
      Key Lock-in Prevention When the key is in the ignition key cylinder and a door lock operation is performed while the driver's door is open, all the doors will be unlocked