Door Lock - Smart Key System
DOOR LOCK: SMART KEY SYSTEM: SYSTEM DIAGRAM
SYSTEM DESCRIPTION
CAUTION:
If using a pacemaker, be sure to read the manual of the pacemaker before using the electrical key because the radio waves of the electrical 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 back door and glass hatch opening without operating the electrical key. The only requirement is that the electrical 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 an electrical 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 oscillators (2 door electrical key oscillators, 1 back door outside electrical key oscillator, and 3 indoor electrical key oscillators).
2. DETECTION AREA
(a) Precautions for the entire system:
* Be sure to carry the electrical key during inspection of the smart key system.
* As weak radio waves are used to detect the electrical key, the electrical key detection area may decrease, or the electrical key may not be detected correctly in the following situations:
a. The electrical key battery is depleted.
b. Any facilities that generate strong radio waves, such as a TV tower, power plant, broadcast station, or gas station, are located nearby.
c. A wireless device, such as a cellular phone, is carried with the electrical key.
d. The electrical key is in contact with or covered with metal.
e. Another wireless door lock control function is operated near the vehicle.
f. The electrical key is located near a device that generates high voltage or noise.
* The electrical key may be difficult to operate for a reason relating to the vehicle body shape.
* The electrical key may not be detected correctly if it is around the vehicle's windows, the door outside handle, or the center of the bumper even when it is in the detection area outside the vehicle.
* The electrical 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 electrical key may not operate if the electrical key is not held properly.
* The smart key system does not operate in the following conditions:
a. The smart key system is canceled.
b. The electrical key battery is completely depleted (the indicator does not blink when pushing any of the buttons on the electrical key).
3. FUNCTION OF MAIN COMPONENTS
4. CONSTRUCTION AND OPERATION
(a) Electrical Key
The electrical 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.
* This mechanical key works for the driver door, glove box, but cannot start the engine.
A total of 7 electrical keys can be registered.
(b) Oscillator (door electrical key oscillators, front, center and rear indoor electrical key oscillators, back door outside electrical key oscillator)
Each oscillator transmits the request signal received from the certification ECU (smart key ECU assembly), and forms an electrical key detection area to detect the presence of an electrical key. The detection area formed by the door electrical key oscillator and back door outside electrical key oscillator is approximately 0.7 to 1.0 m (2.3 to 3.3 ft.) from the door 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 power switch is off and each door is locked. In this way, it detects the proximity of an electrical key. During entry lock, the detection area is formed with the lock switch on.
* The detection area of the back door outside oscillator is formed when the back door opener switch, back door entry lock switch and glass hatch opener switch are on.
* The detection area of the indoor electrical key oscillator (front, center 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.
5. ENTRY FUNCTION OPERATION
(a) The smart key system has the following functions:
6. WIRELESS DOOR LOCK AND UNLOCK AND POWER BACK DOOR OPEN*1 FUNCTION
Push the Lock/Unlock/Power Back Door Open*1 switch on the electrical key to operate each function. For details, Operation Check.
HINT
*1: w/ Power Back Door 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 electrical key.
(b) When the person carrying the electrical key enters the detection area around the vehicle, the matching of the ID codes for a door electrical key oscillator and electrical 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 door outside handle starts sensing. If the door outside handle is held (the back side of the door outside 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 30 seconds.
8. ENTRY LOCK FUNCTION
(a) After leaving the vehicle carrying the electrical key, push the lock switch on the door outside handle and back door opener switch when all the doors are closed.
(b) The certification ECU (smart key ECU assembly) determines whether the electrical key is located inside or outside the cabin based on the information from a door electrical key oscillator and room oscillator. Then matching of the ID codes is performed.
(c) When the matching result shows that the ID codes of the electrical key and indoor antenna do not match and the ID codes of the electrical 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 electrical 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 BACK DOOR OPEN FUNCTION
Stand in front of the back door with the electrical key and push the back door opener switch to start the matching of the ID codes for the outside electrical key oscillator (back door). If the ID codes match, back door open operation will be performed.
10. ENTRY GLASS HATCH OPEN FUNCTION
Stand in front of the back door with the electrical key and push the glass hatch opener switch to start the matching of the ID codes for the outside electrical key oscillator (back door). If the ID codes match, glass hatch open operation will be performed.
11. ELECTRICAL KEY LOCK-IN PREVENTION FUNCTION
(a) If you attempt to lock the door through keyless operation (turn the lock knob to LOCK and then close the door) with the electrical key in the cabin, the system determines that the electrical key is located in the cabin and unlocks the door.
(b) If the glass hatch is closed with the electrical key in the luggage compartment, the alarm will sound and the glass hatch can be opened only when all the doors are locked in order to prevent electrical key confinement in the vehicle.
12. 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, and illuminate the combination meter's multi-information display in order to alert the driver.
(b) Situation A
There are 2 patterns for situation A.
Pattern 1: A door is opened and the user tries to leave the vehicle.
Pattern 2: Then the user holds the electrical 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: A door is opened and the user tries to leave the vehicle. Then the user holds the electrical 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 two patterns for situation G.
* Pattern 1: When the driver's door is open, the driver changes the power source mode to ON (ACC) and attempts to leave the vehicle.
* Pattern 2: When the driver's door is open, the driver changes the power source mode 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 glass hatch door is closed with the electrical 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:
(n) Situation M
A warning message appears on the meter when the driver does not follow the proper procedure to start the vehicle.
In this situation, the following control is performed:
13. 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 discharged 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 electrical key and presses the lock switch on a door outside handle.
* A door is locked or unlocked by the mechanical key.
(b) Electrical Key Battery and Vehicle Battery Saving Function
In the smart key system, if the electrical key is constantly located within the vehicle exterior detection area of the doors, the system maintains periodic communication with the electrical key. Therefore, if the vehicle remains parked in that state for a long time, the electrical key battery and the vehicle battery could be discharged. 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 electrical key and presses the lock switch on a door outside handle.
* A door is locked or unlocked by the mechanical key.