Smart Entry System
SYSTEM DIAGRAMSystem Diagram - Overview Of Parts Layout Part 1:
System Diagram - Overview Of Parts Layout Part 2:
System Diagram - Overview Of Parts Layout Part 3:
OVERVIEW OF PARTS LAYOUT
SYSTEM DESCRIPTION
1. SMART ENTRY SYSTEM DESCRIPTION
- In addition to the mechanical key function and the wireless door lock remote control function, this system provides the smart key with a bi-directional communication function. This function enables the smart ECU to recognize the presence of the smart 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 smart key is in the user's possession.
- This system consists of a smart key ECU, power source control ECU, transponder key ECU, body ECU, smart key, 5 oscillators, 5 antennas, 2 touch sensors, 3 lock switches, and a wireless door lock receiver. The smart ECU controls the system.
- The smart entry system operates in cooperation with the push button start system, the immobilizer system and the wireless door lock remote control system.
Part 1:
Part 2:
2. FUNCTION OF MAIN COMPONENTS
3. SYSTEM FUNCTION
a. Smart unlock
- For the system to be able to detect the location of the smart 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 (approximately 0.7 to 1.0 m (2.3 to 3.3 ft) around each front outside door handle).
- When the smart 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 smart key assumes the unlock standby condition. In this condition, if the touch sensor on the outside door handle is touched, all doors unlock.
b. Smart back door unlock
- With all doors locked, if the back door opener switch is pressed with the smart key in the user's possession, the back door oscillator (outer) outputs a smart key detection signal and the smart ECU checks the ID code. After the check is completed, the smart ECU unlocks* the back door via the 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 smart unlock is set to individual door unlock mode, only the back door will be unlocked. If set to all door unlock mode, all doors will be unlocked.
NOTE: Handling Precaution for Smart Back Door Unlock Smart back door unlock function may not operate if the smart key is placed near the center of the rear bumper.
c. Smart lock
- When the smart key is located outside of the vehicle and all the doors are closed, if the user presses the lock switch on the outside door handle or the lock switch on the back door, the smart ECU will actuate all oscillators and start checking for the ID code of a smart key.
- At this time, if an oscillator outside of the vehicle (driver's/front passenger's door oscillator or back door outer oscillator) determines that the ID code of the smart key is legitimate, the smart ECU determines that the smart key has been taken outside the vehicle and locks the doors via the body ECU.
- A smart unlock operation will not be authorized for approximately 3 seconds* after the doors have been locked.
*: The setting of this duration can be changed using the customize function.
d. Smart ignition
OFF -> ON (ACC) -> ON (IG)
- If the driver presses the power switch once without depressing the brake pedal, the room oscillator, in accordance with the request signal received from the smart ECU, forms a smart key detection area inside the vehicle by emitting smart key detection signals. Accordingly, the smart key sends an ID code signal to the smart ECU via the wireless door lock receiver. The smart ECU checks the ID code of the smart 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 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) power mode.
- After the transition to the ON (ACC) power mode, 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) power mode.
OFF -> ON (READY)
- If the driver presses the power switch once while depressing the brake pedal, the room oscillator, in accordance with the request signal received from the smart ECU, forms a smart key detection area inside the vehicle by emitting smart key detection signals. Accordingly, the smart key sends an ID code signal to the smart ECU via the wireless door lock receiver.
- The smart ECU checks the ID code of the smart 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) power mode.
- After the indicator lamp 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 smart 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) mode.
e. Warning function
- General
The smart key system is equipped with a warning function to prevent problems resulting from errors in smart key usage. The smart key system works without any requirements from the driver other than having the key in one's possession. The driver, 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:
1. The driver is unaware that the key has been taken out of the vehicle by a passenger.
2. The driver exits the vehicle with the hybrid system running.
3. The driver exits the vehicle with the shift position in a position other than P.
If the above situations occur, the hybrid system may be unable to be started once it has been turned off, the vehicle may be stolen, or other problems may follow. Warning function descriptions for several smart key usage errors are below.
- Warning against the driver taking the smart key outside the vehicle with its shift position in P.
- Warning against the driver taking the smart key outside the vehicle while the shift position is in a position other than P.
- Warning against a passenger taking the smart key outside the vehicle.
- Warning against operating the smart lock while the hybrid system is in operation.
- Warning against operating the door lock while the smart key remains inside the vehicle.
- Warning against low battery of the smart key.
- Warning against operating the smart ignition outside the detection area of the room oscillator.
- Warning against operating the door lock while any of the doors is open.
Warning against the driver taking the smart key outside the vehicle with its shift position in P:
Warning against the driver taking the smart key outside the vehicle while the shift position is in a position other than P:
Warning against a passenger taking the smart key outside the vehicle:
Warning against operating the smart lock while the hybrid system is in operation:
Warning against operating the door lock while the smart key remains in the vehicle:
Warning against low battery of the smart key:
Warning against operating the smart ignition outside the detection area of the room oscillator:
Warning against operating the door lock while any of the doors is open:
f. Smart unlock mode selector function
- When the power switch is OFF, and the smart key's lock switch and panic switch remain pressed for approximately 5 seconds, the smart unlock mode can be changed between the following : individual door unlock, driver's door unlock, all door unlock and individual door unlock.
- The wireless door lock buzzer informs the user of the smart unlock mode, Refer to the chart.
NOTE:
- This function only changes the unlocking modes of the smart entry system. It does not affect to the wireless door lock remote control system.
- When changing modes, be sure to push the LOCK switch firmly or the panic alarm may active.
g. Power saving function
- When the doors are locked, the door oscillators emit signals to the outside of the vehicle at default intervals of 300 msec. To avoid depleting the auxiliary battery, the system has a battery saving function whereby: 1) after 5 days without a response from the smart key, the system extends door oscillator signal intervals to 600msec.; and 2) after 14 days without a response from the smart key, the system deactivates the smart entry system.
- When the doors are locked and the smart key is located within the vehicle exterior detection area, the smart key and door oscillators are maintaining communication and using power. To avoid depleting the smart key battery and auxiliary battery, if the smart key is located within the vehicle exterior detection area for longer than 10 minutes, the system deactivates the smart entry system. Refer to the chart for information on how to reinstate the smart entry system.
4. SMART ENTRY SYSTEM OPERATION PRECAUTIONS
a. General smart functions:
1. Functions and operating ranges:
The functions will not operate if the smart key is not present within the detection areas described below. Furthermore, the functions may not operate or their operating range may decrease if the battery is depleted or in the presence of strong radiowaves or noise. There are also areas in which the functions may not operate properly due to the shape of the vehicle body.
- Smart lock and smart unlock:
Applicable within approximately 0.7 to 1.0 m (2.3 to 3.3 feet) radius of each front door handle. However, this function may not operate near the windows or door handles.
- Smart ignition:
Applicable within vehicle interior. This function may not operate if the smart key is placed on the instrument panel, on the rear tray, in the glove box, or on the floor. If the smart key is placed outside of the vehicle, this function may not operate if the smart key is placed near a window.
- Smart back door unlock:
Applicable within approximately 0.7 to 1.0 m (2.3 to 3.3 feet) radius of the back door opener switch. However, this function may not operate if the smart key is placed near the center of the rear bumper.
2. The smart entry system uses very weak radiowaves:
The smart functions and the wireless door lock remote control functions may not operate properly (unable to operate the smart lock, unlock, ignition, and back door unlock functions, or a false alarm is issued) in the situations described below. In this case, use the enclosed mechanical key to lock or unlock the driver's door and insert the smart key to start the hybrid system.
- The presence of a facility that generates strong radiowaves nearby, such as a TV tower, electric power plant, or broadcasting station.
- The user has a wireless communication device such as a wireless transmitter or portable telephone along with the smart key.
- The smart key is covered with a metal object or is placed near a metal object.
- A radiowave type wireless door lock remote control is being used in the vicinity.
- When placing the smart key near electrical appliances.
b. Smart entry system inoperative conditions:
The smart function will not operate under the conditions listed below.
- The smart cancel switch provided below the driver's side instrument panel is turned on.
- The smart key is inserted into the key slot.
- The smart key has no battery (the indicator light does not flash even if the buttons on the smart key are pressed).