System Description

This system lock/ unlocks the doors remotely. The wireless door lock control system has the following features:

• The certification ECU performs the code identification process and the multiplex network body ECU controls the door lock. A serial data link is provided for communication between the certification ECU and multiplex network body ECU.
• A key-integrated type transmitter is used and it contains the following 4 switches: LOCK switch, UNLOCK switch, LUGGAGE switch and PANIC switch.
• An LED is mounted on the transmitter to show if the battery is depleted.

1. FUNCTION OF MAIN COMPONENTS 
   MAIN COMPONENTS FUNCTION CHART
   
   

   Component	Function
   Door control transmitter	Contains LOCK, UNLOCK, LUGGAGE switch 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, changes waves to code data
   Front door courtesy light switch assembly Rear door courtesy light switch assembly	Turns on when door is open and off when door is closed. Outputs door status (open or closed) to multiplex network body ECU
   Door lock position switch	Transmits door lock positions of each door to multiplex network body ECU
   Certification ECU	Matches code data with registered code and outputs code data to multiplex network body ECU

2. SYSTEM FUNCTION 
   1. Door locks/unlock function:

      With the engine switch 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, which are then input to the door control receiver. The door control receiver converts these waves into code data (recognition codes and function codes) in its internal high frequency circuit, and outputs its evaluation results to the multiplex network body ECU. Upon receiving a door lock/unlock request signal, the multiplex network body ECU outputs a door lock/unlock control signal to each door ECU. Each door ECU outputs a door lock/unlock control signal to each door lock motor. Each door lock assembly then locks/unlocks its door and turn on/off its lock position switch according to the signals.

   2. Answer-back function:

      The multiplex network body ECU receives the door unlock detection switch's on/off signals and uses these signals to confirm if door control operation has completed. The multiplex network body ECU then outputs a hazard warning light output control signal and the hazard warning lights start flashing.

   3. Panic alarm function:

      With the engine switch off or on (ACC), press and hold the door control transmitter PANIC switch for 1 second or more. The following occurs: 1) the multiplex network body ECU activates an interior relay and the security horn sounds, and 2) the alarm control signals of the hazard warning light, vehicle horn, headlights and taillights are sent to each control ECU, starting the theft deterrent alarm.

   4. The wireless door lock control system has the following functions.
   SYSTEM FUNCTION CHART
   
   

   Function	Outline
   All doors lock function	Pressing LOCK switch locks all doors
   All doors unlock (2-step unlock function)	Pressing UNLOCK switch twice within 3 seconds unlocks all doors after driver side door is unlocked
   Luggage compartment door open function	Pressing TRUNK switch for 0.8 seconds or more opens luggage compartment door
   Power window and sliding roof open function	Pressing UNLOCK switch for 0.5 seconds or more opens all power windows
   Power window and sliding roof close function	Pressing LOCK switch 2.5 seconds or more closes all power windows
   Answer-back function	When doors are locked, hazard warning lights flash once. When doors are unlocked, hazard warning lights flash twice and wireless warning buzzer sounds twice When transmitter is used for opening luggage compartment door or power windows, this function causes the buzzer to sound to indicate that operation has been completed
   Automatic lock function	If no doors are opened within 60 seconds after they are unlocked by wireless door lock remote control, all doors will lock again automatically
   Panic alarm function	Holding down the PANIC switch for longer than 1 second sets off theft deterrent alarm (security horn sounds, headlights, and taillights flash)
   Door ajar warning function	If any door is open or ajar, pressing LOCK switch will cause wireless door buzzer to sound for about 10 seconds
   Transmitter recognition code registration function	Enables 7 modes for registering (writing and storing) transmitter recognition codes in EEPROM