Keyless Entry: Description and Operation

GENERAL INFORMATION

NOTE: In this manual, F.A's.T.-key (Free-hand Advanced Security Transmitter) is described as Key- less Operation System (KOS). (KOS is indicated as F.A's.T. in the scan tool screen.)
The keyless operation system (KOS) is an integrated system of the following functions: the door entry function which enables the driver to unlock the door (only the driver's door when the driver's door outside handle is operated, and all the doors when the front passenger's door outside handle is operated) by gripping the front door outside handle without taking the key out from his/her pocket or bag when he/she is carrying a keyless operation key which has been registered in the vehicle's KOS-ECU. It also allows the driver to unlock the trunk lid by operating the trunk opener switch and to lock all the doors by pressing the lock switch on the front door outside handle or to lock the trunk lid just by closing; the engine start function which starts the engine without using the conventional mechanical key; and the tire pressure monitoring system (TPMS) which warns the driver of low tire pressure by illuminating the warning light. The KOS has the following features:
- The keyless operation key incorporates a lock/unlock button, trunk lid button, and panic button, and can be operated by remote control in the same manner as the conventional keyless entry system. 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 the immobilizer function that inhibits the engine start-up by using an unauthorized key.
- Two keyless operation keys are provided for each vehicle, and up to four keyless operation keys can be registered.
- The keyless operation key incorporates an emergency key to lock/unlock the doors and start the engine when the battery in the keyless operation key is discharged or the keyless operation system malfunction occurs.
- The driver can customize KOS; enabling/disabling all the system functions, enabling the door locking/unlocking function only, or enabling the engine starting function only.
- The incorporated TPMS function monitors the air pressure of all the tires (except spre tire).

Construction Diagram (Part 1):

Construction Diagram (Part 2):

System Configuration: