Keyless Entry: Description and Operation

GENERAL INFORMATION

NOTE:
In this manual, F.A.S.T.-key (Free-hand Advanced Security Transmitter) is described as Keyless Operation System (KOS). (KOS is indicated as F.A.S.T. in the scan tool display.)

The keyless operation system (KOS) enables the driver to unlock all the doors and the trunk lid by just pulling the front door outside handle or operating the trunk lid open switch, without taking the key out from his/her pocket or bag when he/she is carrying a keyless operation key that is registered to the vehicle's KOS-ECU. (When the driver's front door outside handle is operated, only the driver's door is unlocked.) KOS also allows the driver to lock all the doors by pressing the lock/unlock switch on the front door outside handle (door entry function), and start the engine without using the conventional mechanical key (engine start function). Moreover, KOS incorporates the keyless entry function with which, like the conventional keyless entry system, a driver can perform the remote operation (opening/closing of all the doors, opening of the trunk lid, warning function to warn a person who intends to damage the vehicle*) by operating the lock/unlock button, trunk lid button, and panic button on the keyless operation key. The system also incorporates the immobilizer function that prohibits the starting of engine by using an unauthorized key as well as the tire pressure monitoring system (TPMS) that issues a warning to a driver by illuminating or flashing the warning light if an abnormality to the tire pressure or the system error is detected. KOS has the following features:

- Each vehicle is provided with two keyless operation keys, and up to four keyless operation keys can be equipped.
- The keyless operation key also incorporates an indicator light that enables the driver to check if the signal is transmitted correctly or if the battery in the key is discharged.
- The keyless operation key incorporates an emergency key to lock/unlock the front doors when the battery in the keyless operation key is discharged or the keyless operation system is not working normally. Also by using it simultaneously with the keyless operation key (insert the emergency key into the keyless operation key in the inverted direction), the engine can be started.
NOTE:
If the immobilizer related system failure occurs, the engine may not start.

- The driver can customize KOS; enabling the door entry/engine start function, disabling the door entry/engine start function, enabling the door locking/unlocking function only, or enabling the engine starting function only.

NOTE:
*: Horn sounds and the headlight flashes.

CONSTRUCTION DIAGRAM













Main components and functions









NOTE:
*1: When registering the keyless operation keys, KOS-ECU numbers each key (1 to 4) in the order they are registered (initial priority). This priority is renewed each time the doors are locked/unlocked and the IG knob is pressed. For example, when only keys 1 and 3 have responded to the signal sent from KOS-ECU, the new priority of the keys would be 1-3-2-4. When keys 3 and 4 have responded, then the priority of the keys becomes 3-4-1-2.

NOTE:
*2: Illuminates for tire pressure warning. Flashes for about 1 minute and then continuously illuminated for TPMS malfunction warning.

System configuration