Smart Key System (for Entry Function)
THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): SYSTEM DIAGRAM
SYSTEM DIAGRAM
THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): SYSTEM DESCRIPTION
SYSTEM DESCRIPTION
CAUTION: If using a pacemaker, be sure to read the manual of the pacemaker before using the key because the radio waves of the key may affect the pacemaker.
1. SMART KEY SYSTEM DESCRIPTION
(a) In addition to conventional mechanical key and wireless door lock control functions, the smart key system enables door locking/unlocking, steering lock releasing, engine starting, and luggage compartment door opening without operating the key. The only requirement is that the key is in the user's possession.
- This system is controlled by the certification ECU (smart key ECU assembly). When the certification ECU (smart key ECU assembly) detects the presence of a key in one of the detection areas, 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 6 electrical key oscillators (2 door electrical key oscillators, 3 indoor electrical key oscillators, and 1 outside electrical key oscillator).
2. DETECTION AREA
(a) Precautions for the entire system:
- Be sure to carry the key during inspection of the smart key system.
- As weak radio waves are used to detect the key, the key detection area may decrease, or the key may not be detected correctly in the following situations:
1 The key battery is depleted.
2 Any facilities that generate strong radio waves, such as a TV tower, power plant, broadcast station, or gas station, are located near the inspection site.
3 A wireless device, such as a cellular phone, is carried with the key.
4 The key is in contact with or covered with metal.
5 Another wireless door lock control function is operated near the vehicle.
6 The key is located near a device that generates high voltage or noise.
- The key may be difficult to operate for a 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 the 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 package tray, 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 smart key system does not operate in the following conditions:
1 The smart key system is canceled.
2 The key battery is completely depleted (the indicator does not blink when pushing any of the buttons on the key).
3. FUNCTION OF MAIN COMPONENTS
4. CONSTRUCTION AND OPERATION
(a) Key
The key consists of a mechanical key, a transmitter for the wireless door lock control, and a transceiver for the smart key system.
- The transceiver for the smart key system receives signals from the oscillators and sends the ID code to the tuner.
- The transmitter for the wireless door lock control has a LOCK switch, UNLOCK switch, LUGGAGE COMPARTMENT switch.
- This mechanical key works for the driver door, luggage compartment door, and glove box, but cannot start the engine.
A total of 4 keys can be registered.
(b) Electrical key oscillator (door electrical key oscillators, indoor electrical key oscillators (front, rear and luggage compartment) and outside electrical key oscillator (luggage compartment))
Each electrical key oscillator transmits the request signal received from the certification ECU (smart key ECU assembly), and forms a key detection area to detect the presence of a key. The detection area formed by the door electrical key oscillator and outside electrical key oscillator (luggage compartment) is approximately 0.7 to 1.0 m (2.3 to 3.3 ft.) from the outside handle of the door or the center of the rear bumper.
- The detection area of the door electrical key 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, the oscillator detects the proximity of a key. During entry lock, the detection area is formed with the lock switch on.
- The detection area of the outside electrical key oscillator (luggage compartment) is formed when the power luggage door open switch is on.
- The detection area of the indoor electrical key oscillator (front and rear) is formed when the driver door is opened or closed, during start ignition, when a warning is activated, or the lock switch is on.
- The detection area of the indoor electrical key oscillator (luggage compartment) is formed when the luggage compartment door is closed, or the luggage compartment opener outer switch is pressed.
5. ENTRY FUNCTION OPERATION
(a) The smart key system has the following functions:
6. WIRELESS DOOR LOCK AND UNLOCK AND LUGGAGE COMPARTMENT OPEN FUNCTION
Push the LOCK/UNLOCK/LUGGAGE COMPARTMENT switch on the key to operate each function. For details, Wireless Door Lock Control System (w/ Smart Key System).
7. ENTRY UNLOCK FUNCTION
(a) The detection area is formed by communication between a door electrical key oscillator and door control receiver 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 detection area around the vehicle, the matching of the ID codes for a door electrical key 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 sensing. If the outside handle is held (the back side of the handle is touched), the door unlock operation will be performed. At this time, the hazard warning light blinks twice and the wireless door lock buzzer sounds twice.
(d) If any of the doors are not opened after a door unlock operation, all doors will automatically lock after 60 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 (smart key ECU assembly) determines whether the key is located inside or outside the cabin based on the information from a door electrical key oscillator and indoor electrical key oscillator. Then matching of the ID codes is performed.
(c) When the matching result shows that the ID codes of the key and indoor antenna do not match and the ID codes of the key and door electrical key oscillator match, the door lock function will operate. At this time, the hazard warning lights blink once and the wireless door lock buzzer sounds once.
(d) If the key is located inside the cabin, the door lock function will not operate and the alarm buzzer (beep sound) will sound for 2 seconds.
9. ENTRY LUGGAGE COMPARTMENT OPEN FUNCTION
Stand in front of the luggage compartment with the key and push the power luggage compartment opener switch to start the matching of the ID codes for the outside electrical key oscillator (luggage compartment). If the ID codes match, luggage compartment door open operation will be performed.
10. KEY LOCK-IN PREVENTION 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.
11. WARNING FUNCTION
(a) General
When any of the situations below occur, the smart key system causes the certification ECU (smart key ECU assembly) to sound the buzzer in the combination meter and the wireless door lock buzzer in order to alert the driver.
(b) Situation A
There are 2 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 2 patterns for situation B.
Pattern 1: In situation B, the door is opened and the user tries to leave the vehicle.
Then the user holds the key and tries to move away from the vehicle.
Pattern 2: Then the user tries to use the entry lock and presses the lock switch.
In these situations, the following control is performed:
- Pattern 1
- Pattern 2
(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:
(h) Situation G
There are 2 patterns for situation G.
- Pattern 1: When the driver's door is open, the driver turns the engine switch on (ACC) and attempts to leave the vehicle.
- Pattern 2: When the driver's door is open, the driver turns the engine switch from on (IG) to off and attempts to leave the vehicle.
In these situations, the following control is performed:
Pattern 1 and Pattern 2
(i) Situation H
The lock switch on the door outside handle is pressed to perform entry lock with a door open. In this situation, the following control is performed:
(j) Situation I
The luggage compartment door is closed with the key left in the luggage compartment. In this situation, the following control is performed:
(k) Situation J
The steering lock cannot be released. In this situation, the following control is performed:
(l) Situation K
A malfunction of the steering lock ECU is detected. In this situation, the following control is performed:
(m) Situation L
A malfunction of the main body ECU (instrument panel junction block) is detected. In this situation, the following control is performed:
12. BATTERY SAVING
(a) Vehicle Battery Saving Function
In the smart key system, signals are emitted outside the vehicle at a prescribed interval (0.25 seconds) 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 carried out:
Reinstatement Conditions
- A wireless door lock control signal (lock, unlock) is input and the ID code matches.
- A user carries the key and pushes a lock switch on an 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 detection 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 control signal (lock, unlock) is input and the ID code matches.
- A user carries the key and pushes a lock switch on an outside door handle.
- A door is locked or unlocked by the mechanical key.