Door Lock - Smart Key System

DOOR LOCK: SMART KEY SYSTEM:

SYSTEM DIAGRAM

1. OVERVIEW OF PARTS LAYOUT














SYSTEM DESCRIPTION

1. SMART KEY SYSTEM DESCRIPTION

- In addition to the mechanical key function and the wireless door lock control function, this system provides the key with a bi-directional communication function. This function enables the certification ECU to recognize the presence of the key within several detection areas. The system can lock or unlock the doors, or start the hybrid system without key operation as long as the key is in the user's possession.
- This system consists of a certification ECU, power source control ECU, transponder key ECU, multiplex network body ECU, key, 5 oscillators, 5 antennas, 2 touch sensors, 3 trigger switches and a door control receiver. The certification ECU controls the system.
- The smart key system (for door lock) operates in conjunction with the smart key system (for starting), the immobiliser system and the wireless door lock control system.

2. FUNCTION OF MAIN COMPONENTS










3. SYSTEM FUNCTION
(a) Entry unlock
- For the system to be able to detect the location of the key, the vehicle doors must be locked. The door oscillators transmit key detection signals at prescribed intervals in order to form vehicle exterior detection areas (0.7 to 1.0 m (2.3 to 3.3 ft.)).
- When the key is brought into a detection area, the system automatically checks the key's ID code. When this is completed, the door that has detected the key enters the unlock standby condition in accordance with the prescribed unlock mode. In this condition, if the touch sensor on the outside door handle is touched, all doors unlock.





HINT: *: This is the default setting. The entry unlock mode can be changed by pressing the LOCK and PANIC switches on the key for approximately 5 seconds. For details, see CUSTOMIZE PARAMETERS Customize Parameters.





(b) Back door entry unlock
- With all doors locked, if the back door opener switch is pressed with the key in the user's possession, the luggage electrical key oscillator (outer) outputs a key detection signal and the certification ECU checks the ID code. After the check is completed, the certification ECU unlocks* the back door via the main body ECU. At this time, if the user continues to press the back door opener switch, the back door lock latch will be released.
HINT: *: If entry unlock is set to individual door unlock mode, only the back door will be unlocked. If set to all door unlock mode or driver's door unlock mode (default setting), all doors will be unlocked.




HINT: Handling precaution for back door entry unlock:
Back door entry unlock function may not operate if the key is placed near the center of the rear bumper.

(c) Entry lock
- When the key is located outside the vehicle and all doors are closed, if the user presses the lock switch on the outside door handle or the lock switch on the back door, the certification ECU will actuate all oscillators and start checking for the ID code of a key.
- At this time, if an oscillator outside the vehicle (driver's/front passenger's door electrical key oscillator or luggage electrical key oscillator (outer)) determines that the key ID code is legitimate, the certification ECU determines that the key has been taken outside the vehicle and locks all doors via the main body ECU.
- An entry unlock operation will not be authorized for approximately 3 seconds* after the doors have been locked.
HINT: *: The setting of this duration can be changed using the customize function. For details, see CUSTOMIZE PARAMETERS Customize Parameters.





(d) Entry ignition
OFF , ON (ACC) , ON (IG)
- If the driver presses the power switch once without depressing the brake pedal, the indoor electrical key oscillator, in accordance with the request signal received from the certification ECU, forms a key detection area inside the vehicle by emitting key detection signals. Accordingly, the key sends an ID code signal to the certification ECU via the door control receiver. The certification ECU checks the ID code of the key and transmits the check results to the transponder key ECU.
- The transponder key ECU transmits the check results to the power source control ECU. If the check results show that the ID code is legitimate, the power source control ECU will turn on the ACC relay and start the ACC power supply. At this time, the power source control ECU illuminates a green indicator light on the power switch in order to inform the driver of the ON (ACC) status.
- After the transition to the ON (ACC) status, if the driver presses the power switch again, the power source control ECU will turn on the IG1 and IG2 relays and start the IG power supply. At this time, the power source control ECU illuminates an amber indicator light on the power switch in order to inform the driver of the ON (IG) status.




OFF , ON (READY)
- If the driver presses the power switch once while depressing the brake pedal, the indoor electrical key oscillator, in accordance with the request signal received from the certification ECU, forms a key detection area inside the vehicle by emitting key detection signals. Accordingly, the key sends an ID code signal to the certification ECU via the door control receiver.
- The certification ECU checks the ID code of the key and transmits the check results to the transponder key ECU.
- The transponder key ECU transmits the check results to the power source control ECU. If the check results reveal that the ID code is legitimate, the power source control ECU will turn on the ACC, IG1 and IG2 relays and start the ACC and IG power supply.
- At this time, the power source control ECU illuminates an amber indicator light on the power switch in order to inform the driver of the ON (IG) status.
- After the indicator light has illuminated, the power source control ECU transmits a hybrid system start request signal to the hybrid vehicle control ECU.
- Upon receiving this signal, the hybrid vehicle control ECU verifies the check results of the key ID code provided by the transponder key ECU.
- If the check results reveal that the ID code is legitimate, the hybrid vehicle control ECU starts the hybrid system.
- At this time, the power source control ECU will turn off the indicator light on the power switch in order to inform the driver of the ON (READY) status.





(e) Warning function
- General
The smart key system is equipped with a warning function to prevent problems resulting from errors in key usage. The smart key system works without any requirements other than having the key in the user's possession. The user, as a result, may become unaware of the presence or location of the key and make errors (listed below) that could lead to serious problems.

EXAMPLES:
- The driver is unaware that the key has been taken out of the vehicle by a passenger.
- The driver exits the vehicle with the hybrid system running.
- The driver exits the vehicle with the shift position not on P.
If the above situations occur, the hybrid system may be unable to be started after it has been turned off, the vehicle may be stolen, or other problems may result. Warning function descriptions for several key usage errors are below.
(1) Warning against the driver taking the key outside the vehicle with the shift position on P:





(2) Warning against the driver taking the key outside the vehicle while the shift position is not on P:





(3) Warning against a passenger taking the key outside the vehicle:





(4) Warning against operating the entry lock with the hybrid system operating:





(5) Warning against operating the door lock while the key remains in the vehicle:





(6) Warning against low battery of the key:





(7) Warning against operating the entry ignition outside the detection area of the indoor electrical key oscillator:





(8) Warning against operating the door lock while any of the doors is open:






(f) Entry unlock mode selector function
- When the power switch is OFF, and the key's LOCK switch and PANIC switch remain pressed for approximately 5 seconds, the entry unlock mode can be changed between the following: individual door unlock, driver's door unlock, all doors unlock and individual door unlock.
- The wireless door lock buzzer informs the user of the entry unlock mode. Refer to the chart below.




NOTICE:
- This function only changes the unlocking modes of the smart key system. It does not affect the wireless door lock control system.
- When changing modes, be sure to push the LOCK switch and PANIC switch firmly, or the panic alarm may activate.

(g) Power saving function
- When the doors are locked, the door electrical key oscillators emit signals to the outside of the vehicle at default intervals. To avoid depleting the auxiliary battery, the system has a power saving function whereby: 1) after 5 days without a response from the key, the system extends door electrical key oscillator signal intervals; and 2) after 14 days without a response from the key, the system deactivates the smart key system.
- When the doors are locked and the key is located within the vehicle exterior detection area, the key and door electrical key oscillators are maintaining communication and using power. To avoid depleting the key battery and auxiliary battery, if the key is located within the vehicle exterior detection area for longer than 10 minutes, the system deactivates the smart key system.
Refer to the chart below for information on how to reinstate the smart key system.