System Description

WIRELESS DOOR CONTROL SYSTEM DESCRIPTION
1. This system locks and unlocks the vehicle's doors remotely. The wireless control system has the following features:
  1. The door control receiver performs the code identification process and the theft warning ECU (theft warning ECU) operates the door lock control. A serial data link is provided for communication between the door control receiver and the theft warning ECU.
  2. A key-integrated type transmitter is used and it has a door lock switch, door unlock switch and luggage open switch.
  3. An LED is mounted on the transmitter to show if the battery is depleted.

FUNCTION OF MAIN COMPONENTS

FUNCTION OF MAIN COMPONENTS CHART

Component	Outline
Door control transmitter	Has LOCK, UNLOCK and LUGGAGE switches Sends faint electric waves (ID codes, function codes) to door control receiver When sending codes, indicator light illuminates
Luggage compartment door lock	Built-in luggage door opener motor rotates and luggage compartment door opens
Door control receiver	Receives faint electric waves (ID codes, function codes) from door control transmitter, changes waves to code data, and outputs data to theft warning ECU
Unlock warning switch	Detects if key is in ignition key cylinder
Front door courtesy light switch Luggage compartment door courtesy light switch	Turns on when door is open, turns off when door is closed. Outputs door status to each multiplex network door ECU front.
Wireless door lock buzzer	Emits beep (answer-back) when doors are locked or unlocked

SYSTEM FUNCTION

Door lock / unlock operation
1. With no key in the ignition key cylinder (KSW OFF) and all door courtesy light switches OFF, press the transmitter LOCK or UNLOCK switch. The transmitter will send a faint electrical wave to the door control receiver. The high frequency circuit built into the door control receiver changes the wave into code data, which is then output to the theft warning ECU.
  The theft warning ECU receives transmitter LOCK / UNLOCK switch signals through the serial communication line. The ECU then sends LOCK / UNLOCK signals to each seat's door ECU through the multiplex communication line. When each seat's door ECU receives a LOCK / UNLOCK signal, the door's lock position switch will change to ON or OFF.
Luggage compartment door open operation
1. With the unlock warning switch OFF, press the door control transmitter's LUGGAGE switch. Similar to the door lock /unlock operation, the following occurs: 1) the theft warning ECU receives the LUGGAGE switch signals through the serial communication line; 2) it sends the luggage compartment door open control signals to the luggage room junction block ECU through the multiplex communication line; and 3) the luggage door opener motor will open the luggage compartment door. Also, the luggage compartment door courtesy light turns on.
Answer-back operation
1. The door unlock detection switch changes from ON to OFF based on operational control signals. The theft warning ECU receives the ON and OFF status of the door unlock detection switch. Once the theft warning ECU receives confirmation that an operation has finished, the ECU: 1) sounds the wireless door lock buzzer, or 2) through the multiplex communication line, sends a hazard warning light output control signal to the driver side junction block ECU to blink the hazard warning lights.
Remote panic function
1. With no key in the ignition key cylinder (KSW OFF) and all door courtesy switches OFF, press and hold the door control transmitter LOCK (PANIC) switch for over 3 seconds. The following occurs: 1) the theft warning ECU activates an interior relay and the security horn sounds, and 2) the alarm control signals of the hazard warning lights, vehicle horns, security horn, headlights and taillights are sent to each control ECU, starting the theft deterrent alarm.

The wireless door lock control system has the following functions:

FUNCTION CHART

Function	Outline
All door lock operation	Pressing LOCK switch locks all doors
Luggage door open operation	Holding down LUGGAGE switch for longer than about 0.8 seconds opens luggage compartment door
Power window open operation	Holding down UNLOCK switch for longer than 2.5 seconds opens all power windows
Answer-back operation	Hazard warning lights flash once when doors are locked and flash twice when doors are unlocked to inform 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 When transmitter is used for opening luggage compartment door or power windows, this function causes buzzer to sound to inform that operation has been completed
Remote panic function	Holding down LOCK (PANIC) switch for longer than 3 seconds sets off theft deterrent alarm (security horn and vehicle horns sound, headlights, taillights and hazard warning lights flash)
Automatic lock function	If no doors are opened within 30 seconds after they are unlocked by transmitter, all doors will lock again automatically
Repeat function	if door is not locked in response to locking operation of transmitter, theft warning ECU will output lock signal after 1 second
Illuminated entry function	With all doors locked, pressing UNLOCK switch will cause simultaneous occurrence of: 1) map light illumination and 2) all door unlock operation
Security function	Sends operation signal as rolling code
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 registering (writing and storing) of 4 transmitter recognition codes in EEPROM that is built into theft warning ECU
Self-diagnosis	If system has malfunction, theft warning ECU sets DTC in its memory