Wireless Door Lock Control System (W/O Smart Key System)

System Diagram:

SYSTEM DESCRIPTION

1. WIRELESS DOOR CONTROL SYSTEM DESCRIPTION

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

2. FUNCTION OF MAIN COMPONENT

3. SYSTEM FUNCTION

a. Door lock/unlock operation
1. With no key in the ignition key cylinder (KSW OFF) and all door courtesy lamp switches OFF, press the door control transmitter LOCK or UNLOCK switch. The door control 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 door control transmitter door LOCK/UNLOCK switch signals through the serial communication line. It sends door LOCK/UNLOCK control signals to each seat's door ECU through the multiplex communication line.

When each seat's door ECU receives a door LOCK/UNLOCK control signal, the door's lock position switch will change to ON or OFF.

b. Luggage compartment door open operation
1. With the unlock warning switch OFF, press the door control transmitter's LUGGAGE OPEN switch. Similar to door LOCK/UNLOCK operation, the following occurs: 1) the theft warning ECU receives the TRUNK OPEN switch signals through the serial communication line. It sends luggage compartment door open control signals to the luggage room J/B ECU through the multiplex communication line. Then the luggage compartment door closer will open the luggage compartment door. Also, the luggage compartment door courtesy lamp turns on.

c. 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 lamp output control signal to the driver side J/B ECU and starts blinking the hazard warning lamps.

d. Panic alarm operation
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. Similar to door LOCK/UNLOCK operation, 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 lamps, vehicle horn, headlamps and taillamps are sent to each control ECU, starting the theft deterrent alarm.

e. The wireless door lock control system has the given functions.