Keyless Entry: Description and Operation
The wireless door lock control system is used to lock and unlock all the doors at a distance, transmitting a weak radio wave from a transmitter contained in the master ignition key.The weak radio wave (coded differently for each key) is sent to the receiver via the rear window defogger wiring from which signal is sent to the theft deterrent ECU.
1. WIRELESS DOOR LOCK OR UNLOCK NORMAL OPERATION
With the Ignition Key not inserted into the Ignition Key Cylinder (unlock warning switch OFF) and all the doors completely closed, the switch (Transmitter) on the Ignition Key depressed, the wireless door lock ECU receives the electrical waves from the Ignition Key (Transmitter), causing it to operate.
As a result, the ECU judges whether the door is locked or unlocked based on the signal from the Door Lock Motor. It sends a signal to the door lock ECU to switch the condition from lock to unlock or vice versa, causing the Door Lock Motor to operate.
2. AUTO LOCK OPERATION
After pushing the Ignition Key switch (Transmitter) to unlock all the doors, if a door is not opened within 30 seconds, all of the doors are automatically locked again.
3. WIRELESS DOOR LOCK STOP FUNCTION
If a door is open (Door Courtesy switch ON), a signal is input from the Door Courtesy switch to the Wireless Door Lock ECU, stopping wireless door lock or unlock.
If the Ignition Key is in the Ignition Key Cylinder (unlock Warning switch ON), the unlock warning switch inputs a signal to the Wireless Door Lock ECU - stopping wireless door lock or unlock.
4. DOOR LOCK MOTOR PROTECTIVE FUNCTION
If the door lock or unlock condition does not change after wireless door lock or unlock operation - the door lock ECU sends current ten times to the Door Lock Motor. If the door lock condition still has not changed as a result the wireless door lock ECU stops reception and stops door lock and unlock function.
By manually operating the door lock or unlock, the stop condition of the wireless door lock function is released.