Last Modified: 11-29-2007 1.6 D
Service Category: Vehicle Interior Section: Door Lock
Model Year: 2008 Model: Sequoia Doc ID: RM0000011GD018X
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: SYSTEM DESCRIPTION (2008 Sequoia)

SYSTEM DESCRIPTION

1. POWER DOOR LOCK CONTROL SYSTEM DESCRIPTION

(a) The power door lock control system locks/unlocks all the doors.

The power window regulator master switch and the door control switch on the front 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 and back door using a mechanical key sends request signals to lock/unlock the doors to the main body ECU.

2. FUNCTION OF MAIN COMPONENT

Component

Function

Power window regulator master switch

Door control switch on power window regulator master switch locks/unlocks all doors.

Door control switch RH

Door control switch on front passenger side locks/unlocks all doors.

Door courtesy switch

Provided for each door. Detects door status (open or closed) and outputs data to main body ECU. Turns on when door is opened and turns off when door is closed.

Driver side door lock

  • Built-in motor locks/unlocks door.
  • Built-in door control switch (key-linked) detects door key operation's door status (locked or unlocked) and outputs data to main body ECU.
  • Built-in position 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.

Passenger side door lock

  • Built-in motor locks/unlocks door.
  • Built-in position 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 LH and RH door locks

  • Built-in motor locks/unlocks door.
  • Built-in position 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 lock

  • Built-in motor locks/unlocks back door.
  • Detects door status (open or closed) and outputs data to back door ECU. Turns on when door is opened and turns off when door is closed.

3. SYSTEM FUNCTION

(a) 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 of the vehicle has the following functions:

Function

Outline

Manual lock and unlock function

This function can lock or unlock all doors by the door lock control switch operation.

Key-linked lock and unlock function

This function, which is linked with the mechanical key cylinder, can lock or unlock all the doors when a lock or unlock operation is effected.

Manual unlock prohibition function

Performing the door lock operation with a mechanical key will prohibit the unlock operation by the door lock control switch.

Key lock-in prevention function

If driver's door lock operation is performed when the mechanical key is in the ignition key cylinder , all the doors will be unlocked.

Shift-linked automatic door lock function*1

When the conditions listed below are met consecutively, this function causes all the doors to be automatically locked.

  • Turn the ignition switch to ON.
  • All doors are closed.
  • The shift lever is moved out of P.
  • Any of the doors are unlocked.

Shift-linked automatic door unlock function

When the ignition switch is ON, and the shift lever is moved to P from any other position, all the doors will be automatically unlocked.

2-step unlock function

This function is provided to unlock the driver's door by turning the key cylinder once and to unlock the remaining doors by turning it twice.

Speed-sensitive automatic door lock

When conditions listed below are all met, this function causes all doors to automatically lock.

  • Vehicle speed is higher than approximately 20 km/h (13 mph).
  • All doors are closed.
  • The shift lever is moved to any position other than P or N.
  • Any one of the doors are unlocked.

Opening driver's door-linked automatic door unlock*1

All doors are unlocked automatically when the driver's door is opened within 10 seconds after the ignition switch is turned off from ON.

HINT:

  • *1: Default is OFF