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Home >> Toyota >> 2021 >> C-HR LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Wireless Door Lock Control System (W/O Smart Key) - Diagnostic Codes & Symptom Tests >> WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System) >> System Description [10/2017 - 12/2021] >> System Description [10/2017 - 12/2021]
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System Description [10/2017 - 12/2021]

  1. WIRELESS DOOR LOCK CONTROL SYSTEM 

    The wireless door lock control system can be used to lock and unlock all doors from a distance. The system is controlled by a door control transmitter assembly which sends radio waves to the door control and tire pressure monitoring system receiver assembly. The main body ECU (multiplex network body ECU) performs an ID code identification process and operates the door lock control.

  2. FUNCTION OF MAIN COMPONENTS 
    Component Function
    Door control transmitter assembly
    • Has the lock, unlock and panic*1 switches.
    • Transmits weak radio waves (recognition codes and function codes) to the door control and tire pressure monitoring system receiver assembly.
    Door control and tire pressure monitoring system receiver assembly Receives weak radio waves from the door control transmitter assembly and sends them to the main body ECU (multiplex network body ECU).
    • Door courtesy light switch assembly
    • Back door courtesy light switch
    • Turns on when a door is opened and turns off when it is closed.
    • Outputs door status signals (open or closed) to the main body ECU (multiplex network body ECU).
    Unlock warning switch assembly Detects if the key is inserted in the ignition key cylinder or not.
    Front door lock with motor assembly
    Rear door lock with motor assembly
    • The built-in motor locks or unlocks the door.
    • Transmits the door lock position of each door to the main body ECU (multiplex network body ECU).
    Main body ECU (multiplex network body ECU) Sends wireless door lock control signals in response to the code data from the door control and tire pressure monitoring system receiver assembly and signals from each switch.
    1. *1: w/ Toyota Safety Sense P
  3. SYSTEM FUNCTION 

    The door control transmitter assembly has the lock and unlock switches. Operating these switches activates each function.

    The wireless door lock control system has the following functions:

    HINT: 

    The default settings of the following functions are on. Part of these functions can be customized.

    Refer to CUSTOMIZE PARAMETERS [10/2017 - 05/2018] , or refer to CUSTOMIZE PARAMETERS [05/2018 - 09/2019] , or refer to CUSTOMIZE PARAMETERS [09/2019 - 12/2021] 

    Function Operation
    All door lock Pressing the lock switch locks all doors.
    All door unlock Pressing the unlock switch unlocks all of the doors.
    All door unlock
    (Unlock 2 operation)    		 Pressing the unlock switch twice within 5 seconds unlocks all of the doors after the driver door is unlocked.
    Automatic lock If none of the doors is opened within 60 seconds after they are unlocked by wireless door lock control, all doors will lock again automatically.
    Answer-back (Hazard warning light)
    • When the doors are locked by wireless operation, the hazard warning lights flash once.
    • When the doors are unlocked by wireless operation, the hazard warning lights flash twice.
    Answer-back (Wireless door lock buzzer) *1
    • When the doors are locked by wireless operation, the wireless door lock buzzer sounds once.
    • When the doors are unlocked by wireless operation, the wireless door lock buzzer sounds twice.
    Panic alarm*1 Pressing the panic switch of the door control transmitter assembly for longer than about 0.8 seconds causes the following alarms to activate:
    • Sounds the vehicle horns and security horn.
    • Blinks the headlights, hazard warning lights and taillights.
    • Illuminates the interior lights.

    While the panic alarm is operating, pressing any switch of the door control transmitter assembly cancels the alarm operation.
    Door ajar warning*1, *2 The buzzer sounds when the lock switch is pressed when any of the doors are ajar, and it sounds for 5 seconds continuously. The buzzer stops when all doors are closed or the unlock switch is pressed.
    Wireless reservation lock*1, *2 Pressing the lock button of the door control transmitter assembly while the door is open causes the door to lock when it is closed.
    Illuminated entry When all doors are locked, pressing the unlock switch causes the interior lights to come on simultaneously with the unlock operation.
    Self-diagnostic mode If the door control and tire pressure monitoring system receiver assembly receives normal radio waves from the door control transmitter assembly when the system is in diagnostic mode, it flashes the interior lights in a normal pattern that corresponds to the function of each switch.
    Transmitter recognition code registration Enables registration (writing and storing) of door control transmitter assembly recognition codes in the EEPROM that is contained in the door control and tire pressure monitoring system receiver assembly.
    1. *1: w/ Toyota Safety Sense P

    HINT: 

    *2: If the customize setting "Wireless Lock Function with Doors Open" is set to ON, "Open Door Warning" will no longer operate. If "Open Door Warning" is set to ON, "Wireless Lock Function with Doors Open" will no longer operate. If both settings are set to ON, "Wireless Lock Function with Doors Open" will be given priority.

  4. TRANSMITTER RECOGNITION CODE REGISTRATION FUNCTION 

    The chart below shows the 4 ID registration function modes. The codes are electronically registered (written and stored) in the EEPROM that is contained in the door control and tire pressure monitoring system receiver assembly.

    Mode Function
    Add mode Adds a newly received code while preserving any previously registered codes.
    This mode is used when adding a new door control transmitter assembly. If the maximum registration number is exceeded, the oldest one is cleared first.
    Rewrite mode Clears all previously registered codes and registers only newly input codes.
    Confirmation mode Confirms how many codes are currently registered. When adding a new code, this mode is used to check how many codes already exist.
    Prohibition mode Deletes all registered codes and disables the wireless door lock function.
    This mode is used when the door control transmitter assembly is lost.
  5. CONDITIONS THAT WIRELESS FUNCTIONS DO NOT OPERATE 
    1. The lock function will not operate when either of the following conditions is met:
      • Any of the doors is open.
      • The key is inserted in the ignition key cylinder.
    2. The unlock function will not operate when the following condition is met:
      • The key is inserted in the ignition key cylinder.
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