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Home › Infiniti › 2009 › M45 Base › Repair and Diagnosis › External Pages › Different car › Section 43 (Door Lock) › Wireless Door Lock Control System › System Description

System Description

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  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-holder type transmitter is used and it contains the following 3 switches: the door lock switch, door unlock switch and panic alarm switch.
  2. FUNCTION OF MAIN COMPONENTS 
    WIRELESS DOOR CONTROL SYSTEM 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.
    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 unlock detection switch) Transmits door lock conditions of each door to main body ECU.
    Unlock warning switch Detects if key is in ignition key cylinder.
    Front 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.
    Rear door courtesy light switch*1, *2 Turns ON when door is open and turns OFF when door is closed. Outputs door status (open or closed) to main body ECU.
    Wireless door lock buzzer Emits beep (answer-back) when doors are locked or unlocked by wireless operation.
    HINT:
    • *1: for Double Cab
    • *2: for CrewMax
  3. SYSTEM FUNCTION 
    1. The wireless door lock control system has the following functions.
      WIRELESS DOOR LOCK CONTROL FUNCTION CHART

      Function Outline
      All door lock function Pressing LOCK switch locks all doors.
      Only driver side door unlock operation function Pressing UNLOCK switch once unlocks only driver side door.
      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 and door mirror turn indicators 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 30 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, map light, room light, foot light and door mirror foot 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 ACC or ON.
      • No operations or actions are performed within 15 seconds.
      Panic function Holding down PANIC switch for more than 1 second sounds security horn and vehicle horns, blinks hazard warning lights, headlights, taillights and door mirror turn indicators, and illuminates map light and room light.
      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.
      HINT:
      • 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 electrical waves to the door control receiver.
      • *:except Extended Type
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