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Home >> Toyota >> 2011 >> RAV4 Base, 2.5 F, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Wireless Door Lock Control System (W/O Smart Key) (Diagnostics - Introduction) >> WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System) >> System Description >> System Description
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System Description

  1. WIRELESS DOOR CONTROL SYSTEM DESCRIPTION 
    1. This system locks and unlocks the vehicle's doors remotely. The wireless control system has the following features:
      • The door control receiver performs the code identification procedure and the main body ECU operates the door lock control. A serial data link is provided for communication between the receiver and main body ECU.
      • A key-integrated type transmitter is used and it contains the following 3 switches: the door lock switch, door unlock switch and panic alarm switch.
      • An LED is built into the transmitter so that the battery status can be checked.
  2. FUNCTION OF MAIN COMPONENTS 
    Components Functions
    Door control transmitter
    • Contains LOCK, UNLOCK and PANIC switches
    • Transmits weak electric waves (recognition codes and function codes) to door control receiver
    • Illuminates indicator light (LED) during transmission
    Door control receiver Receives weak electric waves (recognition codes and function codes) from door control transmitter, and changes waves to code data
    Door lock (door lock position switch) Transmits door lock conditions of each door to main body ECU
    Unlock warning switch Detects if key is in ignition key cylinder
    Door courtesy light switch Turns ON when door is open and turns OFF when door is closed. Outputs door status (open or closed) to main body ECU.
  3. SYSTEM FUNCTION 
    1. Door lock / unlock function:
      • With no key in the ignition key cylinder (unlock warning switch is OFF) and all door courtesy light switches OFF, pressing the door control transmitter's LOCK / UNLOCK switch causes the transmitter to output weak electric waves. The transmitter sends a weak electrical wave to the door control receiver. The high frequency circuit built into the door control receiver demodulates the wave into code data, computes the data, and compares the data with previously registered ID codes. If the data is verified, a door lock / unlock request signal is output to the main body ECU. When the request signal is received, the main body ECU outputs a door lock / unlock control signal to each door lock. Each door lock then locks / unlocks its respective door and turns ON / OFF its door lock position switch in accordance with the signal.
    2. Answer-back function:
      • The main body ECU receives the door unlock detection switch's ON / OFF signals and uses these signals to confirm if the door control operation has been completed. The main body ECU then outputs the hazard warning light control signals to flash the hazard warning lights as an answer-back indication and wireless door lock buzzer signals to cause the wireless door buzzer to sound as an answer-back.
    3. Panic function:

      When the door control transmitter's PANIC switch is pressed, the main body ECU receives the code data (recognition codes and function codes) from the door control transmitter in the same way as when the LOCK / UNLOCK switch is pressed. Upon receiving a theft deterrent alarm control signal, the ECU transmits several kinds of warning control signals (hazard warning light control signal, headlight control signal, taillight control signal, vehicle horn warning control signal, and room light control signal) in order to output a theft deterrent alarm.

    4. The wireless door lock control system has the following functions.
      Function Outline
      All door lock function Pressing LOCK switch locks all doors
      All door unlock operation (2 step unlock operation) function Pressing UNLOCK switch twice within 3 seconds unlocks all doors after driver side door is unlocked
      Answer-back function
      • Hazard warning lights flash once when doors are locked, and flash twice when doors are unlocked to indicate that operation has been completed
      • Wireless door lock buzzer sounds once when doors are locked and sounds twice when doors are unlocked to inform that operation has been completed
      Automatic locking function If no doors are opened within 60 seconds after being unlocked by wireless transmitter, all doors are locked again automatically
      Door ajar warning function If any door is open or ajar, pressing LOCK switch will cause wireless door lock buzzer to sound for about 10 seconds
      Illuminated entry function If locked doors are unlocked through wireless operation, ignition key cylinder light and room light illuminate. If one of following situations occurs, lights fade out:
      • Within 15 seconds, doors are not opened and doors are locked through wireless operation
      • Within 15 seconds, key is inserted into ignition key cylinder and ignition switch is turned ON
      • No operations or actions are performed within 15 seconds
      Panic function Pressing PANIC switch for more than 1 second sounds horn
      Security function Sends signal as rolling code
      Transmitter recognition code registration function Enables 4 modes for registering (writing and storing) transmitter recognition codes in EEPROM, built into door control receiver
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