Wireless Door Lock Control System (w/ Smart Key System)

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System):

SYSTEM DIAGRAM






SYSTEM DESCRIPTION

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

2. FUNCTION OF MAIN COMPONENTS






3. SYSTEM FUNCTION
(a) Door lock/unlock function:
With no key in the key slot (halfway switch is off) and all courtesy light switches off, pressing the door control transmitter's LOCK/UNLOCK switch causes the transmitter to output electric waves which are input to the door control receiver. The door control receiver converts these waves into code data in its internal high frequency circuit, and outputs the code data to the main body ECU. The door control receiver and certification ECU evaluate the code data (recognition codes and function codes) and output the evaluation results to the main body ECU. Upon receiving a door lock/unlock request signal, the main body ECU outputs a door lock/unlock control signal to each door lock. Each door lock then locks/unlocks its respective door and turns on/off its door lock position switch according to the signal.
(b) Answer-back function:
The main 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 main body ECU then outputs the hazard warning light's output control signal to flash the hazard warning light as an answer-back and wireless door lock buzzer signals to cause the wireless door buzzer to sound as an answer-back.
(c) Panic function:
When the door control transmitter's PANIC switch is pressed, the door control receiver and certification ECU evaluate the code data (recognition codes and function codes) from the door control transmitter in the same way as when the LOCK/UNLOCK switch is pressed. Upon receiving a theft deterrent alarm control signal from the certification ECU, the main body ECU actuates a built-in relay to causer the security horn to sound, as well as transmit several kinds of warning signals (hazard warning light control signal, vehicle horn warning control signal, headlight warning signal and taillight warning signal) in order to output a theft deterrent alarm.
(d) The wireless door lock control system has the following functions.