KEYLESS ENTRY SYSTEM

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Outline

Function

Remote transmitter authorization function

•  When the following operation is performed, the body control module (BCM) verifies the remote transmitter ID data.

―  Locking/unlocking using a remote transmitter

Auto re-lock function

•  After unlocking, if any door or the liftgate is not opened and a period of time according to the personalization setting has elapsed, all doors are automatically locked.

Remote transmitter pause function

•  In case of an unauthorized entry into the vehicle, all functions of the remote transmitter left inside the vehicle are temporarily suspended except for the door lock to prevent unauthorized engine starting using the remote transmitter left inside the vehicle.

Remote transmitter left-in-vehicle prevention function

•  When the lock operation is performed with the remote transmitter in the vehicle, all the doors are unlocked automatically to prevent the remote transmitter from being locked in the vehicle.

―  When the lock operation is performed outside the vehicle using a remote transmitter separate from the remote transmitter in the vehicle, all the doors are not unlocked automatically. (because all doors can be unlocked again)

Alert function

•  The user is warned using any of the following if there is a malfunction in the keyless entry system or it is operated incorrectly which results in a problem occurring.

―  Notification and warning speaker

―  Indicator light/warning light/indication on LCD in instrument cluster

Remote transmitter battery voltage low indication function

•  This function signals the user from the instrument panel that the battery voltage of the remote transmitter is low.

Structural View

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System Wiring Diagram

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Operation

Lock/unlock operation using remote transmitter

Note

•  When the lock/unlock button on the remote transmitter is pressed with the main power switched OFF, all the doors are locked/unlocked.

1.  When the lock button or unlock button on the remote transmitter is pressed, the remote transmitter sends the ID data and button operation information (1) using radio waves.

2.  The keyless receiver sends (2) the received ID data and button operation information to the LF control unit via serial communication.

3.  When the LF control unit verifies and matches the ID data, it sends a lock/unlock request signal (3) to the body control module (BCM) via serial communication.

4.  The body control module (BCM) sends the lock/unlock request signal (4) to the following parts via CAN communication.

•  Door-electrical supply unit (driver's side)

•  Door-electrical supply unit (passenger’s side)

•  Electrical supply unit (ESU)

•  Charging port electrical supply unit

5.  When the door-electrical supply unit (driver's side) and the door-electrical supply unit (passenger’s side) receive the lock/unlock request signal (4), they operate (5) the motors of the door lock actuators to lock/unlock the doors.

6.  When the electrical supply unit (ESU) receives the lock/unlock request signal (4), it operates (5) the motor of the liftgate latch and lock actuator to lock/unlock the liftgate.

7.  When the charging port electrical supply unit receives the lock/unlock request signal (4), it operates (5) the charge lid lock actuator to lock/unlock the charging port lid.

8.  The body control module (BCM) sends a hazard light flash request signal (4) to the following parts via CAN communication at the same time the door is locked/unlocked.

•  Instrument cluster

•  Door-electrical supply unit (driver's side)

•  Door-electrical supply unit (passenger’s side)

•  Electrical supply unit (ESU)

•  Charging port electrical supply unit

9.  When the instrument cluster receives the hazard light flash request signal (4), it flashes^*1 (5) the hazard warning lights.

10.  When the front combination lights receive the hazard light flash request signal (4), they flash the front turn lights^*1 (5).

11.  When the door-electrical supply unit (driver’s side) and the door-electrical supply unit (passenger’s side) receive the hazard light flash request signal (4), they flash^*1 (5) the side turn lights.

12.  When the electrical supply unit (ESU) receives the hazard light flash request signal (4), it flashes^*1 (5) the rear turn lights.

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Auto re-lock function operation

•  After the body control module (BCM) sends an unlock request signal to the door-electrical supply unit (driver’s side) and door-electrical supply unit (passenger’s side), if any of the following operations is not performed in 30 sec^*1, it sends a lock request signal to the door-electrical supply unit (driver’s side) and door-electrical supply unit (passenger’s side) to lock the front/rear doors.

―  A door or the liftgate is opened

―  A lock/unlock operation is performed using the remote transmitter.

―  The main power is switched to a position other than OFF

Remote transmitter pause function operation

When door locking is performed

1.  If a lock signal is input with a remote transmitter detected inside the vehicle, the body control module (BCM) sends a request signal using the outside/inside keyless antennas connected to LF control unit.

2.  When the remote transmitter inside the vehicle sends the ID data to the keyless receiver, the keyless receiver transmits the received ID data to the body control module (BCM) via LF control unit.

3.  The body control module (BCM) receives the ID data, and after approx. 32 sec, it suspends the functions of the transmitter inside the vehicle. It also operates the keyless beeper for 10 sec.

When the liftgate is closed

1.  When the liftgate is closed with all the following conditions met, the body control module (BCM) sends a request signal using the interior keyless antennas connected to LF control unit.

―  All doors are locked.

―  The liftgate is opened.

―  The body control module (BCM) identifies a remote transmitter inside the vehicle.

2.  When the remote transmitter inside the vehicle sends the ID data to the keyless receiver, the keyless receiver transmits the received ID data to the body control module (BCM) via the LF control unit.

3.  The body control module (BCM) receives the ID data, and after approx. 32 sec, it suspends the functions of the transmitter inside the vehicle.

Remote transmitter pause cancel operation

•  The functions of the paused remote transmitter are restored when any one of the following conditions is met:

―  A remote transmitter with which the engine can be started is brought inside the vehicle.

―  The lock/unlock button on the paused remote transmitter is pressed.

Remote transmitter left-in-vehicle prevention function operation

1.  The body control module (BCM) sounds the horn and unlocks the doors when all of the following conditions are met and all the doors are closed with the remote transmitter in the vehicle.

―  Driver’s door is locked from unlock with any other door open

―  The liftgate is closed.

―  Main power is switched OFF

Caution

•  If the doors are closed with the main power is switched ON (READY off), the doors are locked with the remote transmitter in the vehicle.

Note

•  When 1.2 s have elapsed since the horn sounded, the horn stops sounding.

Alert function operation

•  Under the conditions in the table below, the body control module (BCM) sends a security warning request signal via CAN communication to the instrument cluster.

•  When the instrument cluster receives the security warning request signal, it displays the warning indicator in the multi-information display or it flashes the KEY warning light.

Condition	Notification and warning speaker	Instrument cluster
	Keyless warning alarm	KEY warning light (red)	Multi-information display
Keyless entry system malfunction	―	On
Driver’s door is opened with main power switched to ACC	ON	―
Remote transmitter cannot be detected in vehicle when all doors are closed with main power switched to position other than OFF	ON	Flash

Remote transmitter battery voltage low indication function operation

•  When the main power is switched from ON (READY off or on) to OFF under the condition indicated in the table, the body control module (BCM) sends a battery voltage low indication request signal to the instrument cluster via CAN communication.

•  When the instrument cluster receives the battery voltage depletion display request signal, it performs the remote transmitter battery voltage low indication in the multi-information display or it flashes the KEY indicator light.

Condition	Instrument cluster
	KEY indicator light (green)	Multi-information display
Body control module (BCM) receives code for low remote transmitter battery voltage*	Flash (for approx. 30 sec after main power is switched OFF)