Keyless Entry: Description and Operation

SYSTEM DIAGRAM

System Diagram:

SYSTEM DESCRIPTION
1. WIRELESS DOOR LOCK CONTROL SYSTEM
The wireless door lock control system functions to lock and unlock all the doors from a distance. The system is controlled by a hand-held transmitter which sends radio waves to the door control receiver. The multiplex network body ECU performs an ID code identification process and engages the door lock control.




2. FUNCTION OF MAIN COMPONENTS

Part 1:

Part 2:

3. SYSTEM FUNCTION
The door control transmitter has lock, unlock, panic and trunk opener switches. Operating these switches activates each function. The wireless door lock control system has the given functions:




4. TRANSMITTER RECOGNITION CODE REGISTRATION FUNCTION
The table shows the 4 ID registration function modes by which up to 4 different codes can be registered. The codes are electronically registered (written and stored) in the EEPROM that is contained in the multiplex network body ECU.

5. OPERATION OF INTERLOCK FUNCTION
a. Lock operation is not available when:
- Any of the doors is open.
- The key is inserted in the ignition switch.

b. Unlock operation is not available when:
- The key is inserted in the ignition switch.

c. Trunk opener operation is not available when:
- The key is inserted in the ignition switch.