Keyless Entry: Description and Operation

DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: SYSTEM DIAGRAM

SYSTEM DIAGRAM









Communication table:





DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM: SYSTEM DESCRIPTION

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 main body ECU RH controls the door lock. A serial data link is provided for communication between the certification ECU and main body ECU RH.
- 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






2. SYSTEM FUNCTION
(a) Door lock / unlock function:
With the power 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 main body ECU RH. Upon receiving a door locks / unlock request signal, the main body ECU RH 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 then locks /unlocks its door and turn on/off its lock position switch according to the signals.
(b) Answer-back function:
The main body ECU RH 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 RH then outputs a turn signal light output control signal and the turn signal lights start flashing.
(c) Panic alarm function:
With the power switch OFF or ON (ACC), press and hold the door control transmitter PANIC switch for 1 second or more. The following occurs: 1) the main body ECU RH 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.
(d) The wireless door lock control system has the following functions.