Door Lock - Smart Key System
DOOR LOCK: SMART KEY SYSTEM: SYSTEM DIAGRAM
ENTRY FUNCTION
WIRELESS DOOR CONTROL FUNCTION
START FUNCTION
ENGINE IMMOBILIZER FUNCTION
START KEY SYSTEM
SYSTEM DESCRIPTION
1. SMART KEY SYSTEM DESCRIPTION
(a) In addition to conventional mechanical key and wireless door lock remote control functions, the smart key system enables door to lock / unlock, steering lock to release, engine to start and luggage compartment to open without operating the key. The only requirement is that the key be in the driver's possession.
* This system is controlled by the certification ECU. When the certification ECU detects the presence of the smart key system in one of the action area, it identifies and checks the ID code, and outputs operation signals to the related ECU in accordance with their functions.
* The detection areas are formed by 8 oscillators (4 door oscillators, 2 luggage compartment oscillators, and 2 cabin oscillators).
2. ACTION AREA
(a) Precautions for the entire system:
* Be sure to carry the key during inspection of the smart key system.
* The key detection area may become small, or the key may not be detected correctly, in the following conditions (As weak radio waves are used to detect the key).
a. The battery is dead.
b. Any facilities that generate strong radio waves, such as a TV tower, power plant or broadcast station, are located near the inspection site.
c. Any wireless applications such as a cellular phone are carried with the key.
d. The key is in contact or covered with metal.
e. A radio wave keyless entry system is operated near the inspection site.
f. The key is located near the device that generates high voltage or noise.
* The key may be difficult to operate for some reason relating to the vehicle body shape.
* The key may not be detected correctly if it is around the vehicle's windows, the door handle or center of the bumper even when it is in the detection area outside the vehicle.
* The key may not be detected correctly if it is on the instrument panel, rear tray or floor, or in the glove box even when it is in the detection area inside the vehicle.
* The engine cannot be started even when the key is in the detection area inside the luggage compartment.
* The key may not operate if the key is not held properly.
* The key emits a weak radio wave. If using a pacemaker, be sure to read the manual of the pacemaker before using the key because this radio wave may affect it.
* The smart key system does not operate in the following conditions:
a. The smart key system is cancelled (For detail, Customize Parameters).
b. The key battery is completely dead (The indicator does not blink by pushing any of the buttons on the key) (For details, Testing and Inspection).
3. FUNCTION OF MAIN COMPONENTS
4. CONSTRUCTION AND OPERATION
(a) Key
The key consists of a mechanical key, a transmitter function for the wireless door lock remote control and a transceiver for the smart key system, and a transponder chip for the engine immobilizer control.
* The transceiver function for the smart key system receives the signals from the oscillators and returns the ID code to the tuner.
* The transmitter function for the wireless door lock remote control has a LOCK button, UNLOCK button, LUGGAGE OPEN button, PANIC button.
* The transponder chip for the engine immobilizer control returns to the engine switch the radio wave response it received from the engine switch.
* This mechanical key works for the driver door, luggage compartment storage extension and glove box, but cannot start the engine.
A total of four keys can be registered. For details, Registration.
(b) Oscillator (Each Door, Front and Rear Cabins, Luggage compartment Inner, luggage compartment Outer)
Each oscillator transmits the request signal received from the certification ECU, and forms a key actuation area to detect the presence of a key.
The actuation area formed by each door oscillator and luggage compartment outer oscillator is approximately 0.7 to 1.0 m (2.3 to 3.3 ft.) from the outside handle of each door, or the center of the rear bumper.
* The actuation area of each door oscillator is formed by transmitting a request signal every 0.25 seconds while the engine switch is off and each door is locked. In this way it detects the proximity of a key. During entry lock, the actuation area is formed with the lock switch on.
* The actuation area of the luggage compartment outer oscillator is formed when the luggage compartment open switch is on. It is formed twice until the key can be verified.
* The actuation area of the front and rear cabin oscillator is formed when the driver door is opened or closed, during start ignition, when a warning is activated, or when the lock switch is on.
* The actuation area of the luggage compartment inner oscillator forms when the luggage compartment lid is closed or the luggage compartment open switch is pressed, and is formed twice until the key can be verified.
5. ENTRY FUNCTION OPERATION
(a) The smart key system has the following functions.
*1: "Prevention of key confinement" function activates only when all the doors are locked.
6. Wireless door lock and unlock and luggage compartment open function
Push the LOCK / UNLOCK / PANIC / LUGGAGE COMPARTMENT button on the key to operate each function.
7. Entry unlock function
(a) The action area is formed by regular communication between the door oscillator and tuner when the door is locked in order to detect access of the person carrying the key.
(b) When the person carrying the key enters the action area around the vehicle, the matching of the ID codes for the door oscillator and key will automatically be performed. After the matching is completed, the door will enter unlock standby mode.
(c) In unlock standby mode, the antenna built into the outside handle starts. If the outside handle is held (the back side of the handle is touched), the door unlock operation will be performed. (If the ID codes do not match, the door unlock operation for that door can not be done by holding the outside handle.) At this time, the hazard warning light blinks twice and the wireless door lock buzzer sounds twice.
(d) If any of the doors is not opened after door unlock operation, all doors will automatically lock after 30 seconds.
8. Entry lock function
(a) After leaving the vehicle carrying the key, push the lock switch on the outside handle when all the doors are closed.
(b) The certification ECU determines whether the key is located inside or outside of the cabin based on the information of the door oscillator and cabin oscillator. The matching of the ID codes is performed.
(c) When the matching result shows that the ID codes of the key and cabin oscillator do not match and those of the key and door oscillator match, the door lock function will operate. As this time, the hazard warning light blinks once and the wireless door lock buzzer sounds once.
(d) If the key is located inside of the cabin, the door lock function will not operate and the alarm buzzer (peep sound) will sound for 2 seconds.
9. Push button start function
(a) When all the power sources of the vehicle are off, get in the vehicle carrying the key. Push the engine switch with the brake pedal released to perform matching of the ID codes inside of the cabin. If the codes match, the engine switch will light up in amber. The engine switch will change between ACC, IG, and OFF every time the engine switch is pushed. If the engine switch is pushed when the engine switch is ON (IG) with the shift lever in a position other than P and N, the engine switch will change to ON (ACC), not to OFF.
(b) When all the power source of the vehicle are off, get in the vehicle carrying the key. When the brake pedal is depressed with the shift lever in the P or N position, the matching of the ID codes will be performed inside the cabin. If the ID codes match, the indicator of the engine switch will light up in green. While the indicator lights up in green, push the engine switch to start the engine.
10. Push button start function (Key battery is dead)
(a) Get in the vehicle carrying the key (Use the mechanical key built into the key to unlock the door). Depress the brake pedal and hold the ornament face of the key to the engine switch so that the distance between them is 10 mm or less.
Release the brake pedal and push the engine switch within 5 seconds after a pip buzzer sounds. The engine switch will light up in amber. The engine switch will change between ACC, IG, and OFF every time the engine switch is pushed If the engine switch is pushed when the engine switch is ON (IG) with the shift lever in a position other than P and N, the engine switch will change to ON (ACC), not OFF.
(b) Get in the vehicle carrying the key (Use the mechanical key built into the key to unlock the door). Depress the brake pedal with the shift lever in the P or N position and hold the ornament face of the key to the engine switch so that the distance between them is 10 mm or less.
The indicator of the engine switch lights up in green after a pip buzzer sounds. Push the engine switch with the brake pedal depressed within 5 seconds of the buzzer sound.
11. Engine stop - Steering lock function / Engine immobilizer set function
If the engine switch is pushed after the vehicle stops, the engine and all the power sources will turn off. If the engine switch is pushed when the vehicle stops with the shift lever in a position other than P and N, the engine switch will change to ON (ACC), not to OFF.
If the driver's door is opened with the shift lever in the P position, steering lock will operate.
12. Entry luggage compartment open function
Stand in front of the luggage compartment with the key and push the luggage compartment open switch to start the matching of the ID codes for the luggage compartment oscillator (outer). If the ID codes match, luggage compartment open operation will be performed.
13. Prevention of key confinement function
(a) If you attempt to lock the door through keyless operation (move the lock knob to the lock position and then close the door) with the key in the cabin, the system determines that the key is located in the cabin and unlocks the door.
(b) If the luggage compartment is closed with the key in it, the alarm will sound and the luggage compartment can be opened only when all the doors are locked in order to prevent key confinement in the vehicle.
HINT
"Prevention of key confinement" function activates only when all the doors are locked.
14. Entry illumination function
(a) When a person carrying the key enters the action area, the door will enter unlock standby mode and the front dome light and door mirror foot light will light up.
HINT
The smart illumination function operates when the key enters the detection area from out of the detection area outside of the cabin (for 3 seconds or more). If the key remains in the detection area, the illumination function does not operate.
15. Memory call function
When the driver's door is opened or the engine switch is turned ON (ACC, IG), the seat position, etc. will automatically be restored to the state that has been set for the key code.
For the procedures of key registration Registration and cancellation Customize Parameters.
16. Warning Function
(a) General
When any of the situation below occurs, the smart key system causes certification ECU to sound the buzzer in the combination meter and the wireless door lock buzzer, and illuminate the key warning light in order to alert the driver.
(1) An exit warning if the shift lever is in a position other than "P" and the power source is a mode other than "OFF".
(2) An exit warning if the shift lever is in "P" and the power source is a mode other than "OFF".
(3) A warning if the occupant leaves with the key.
(4) A warning if the engine switch is operated while the key is outside the actuation area.
(5) A warning if the entry lock is operated while the key is inside the vehicle.
(6) A warning if the key battery is weak.
(b) Situation: A
There are two patterns for situation A.
Pattern 1. In situation a), the door is opened and the user tries to leave the vehicle.
Pattern 2. Then the user holds the key and tries to move away from the vehicle.
In these situations the following control is performed.
Pattern 1.
Pattern 2.
(c) Situation: B
There are three patterns for situation B.
Pattern 1. In situation b), the door is opened and the user tries to leave the vehicle.
Pattern 2. Then the user holds the key and tries to move away from the vehicle.
Pattern 3. Then the user tires to use the entry lock and presses the lock switch.
In these situations the following control is performed.
Pattern 1.
Pattern 2.
Pattern 3.
(d) Situation: C
In this situation the following control is performed.
(e) Situation: D
In this situation the following control is performed.
(f) Situation: E
In this situation the following control is performed.
(g) Situation: F
In this situation the following control is performed.
17. Battery Saving
(a) Vehicle Battery Saving Function
In the smart key system, signals are emitted outside of the vehicle at a prescribed interval (300 ms) when the doors are locked. Therefore, the vehicle battery could be drained if the vehicle remains parked for a long time. For this reason, the controls listed below are effected.
Reinstatement Conditions
* A wireless door lock remote control signal (lock, unlock, or luggage compartment lid open) is input and the ID matches.
* A user carries the key and pushes a lock switch signal for the outside door handle.
* A door is locked or unlocked by the mechanical key.
(b) Key Battery and Vehicle Battery Saving Function
In the smart key system, if the key is constantly located within the vehicle exterior actuation area of the doors, the system maintains periodic communication with the key. Therefore, if the vehicle remains parked in that state for a long time, the key battery and the vehicle battery could be drained. For this reason, if this state continues longer than 10 minutes, the smart key system automatically becomes deactivated.
Reinstatement Conditions
* A wireless door lock remote control signal (lock, unlock, or luggage compartment lid open) is input and the ID matches.
* A user carries the key and pushes a lock switch signal for the outside handle.
* A door is locked or unlocked by the mechanical key.