The keyless operation system (KOS) enables the
driver to lock or unlock all the doors (including the
tailgate) by just operating the lock/unlock switch on
the front door outside handles or operating the tail-
gate lock release handle (tailgate open switch, tail-
gate lock switch), without taking the keyless
operation 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 (Door
entry function). The KOS also allows the driver to
start the engine without using the conventional
mechanical key (engine start function). Moreover, the
KOS incorporates the keyless entry function with
which, like the conventional keyless entry system, a
driver can perform the remote operation (open-
ing/closing of all the doors and the tailgate) by using
the lock/unlock switch of the keyless operation key
and the immobilizer function that prohibits the start-
ing of engine by using an unauthorised key. The
KOS has the following features:

• Each vehicle is provided with two keyless opera-

tion keys, and up to four keyless operation keys
can be registered in the vehicle's KOS-ECU.

• The keyless operation key also incorporates an

indicator lamp that enables the driver to check if
the signal is transmitted correctly or if the battery
in the key is discharged (Refer to

P.42B-14

• The keyless operation key incorporates an emer-

gency key to lock/unlock the front doors in case
the battery in the keyless operation key is dis-
charged or the keyless operation system is not
working normally.

NOTE: If the immobilizer related system failure

occurs, the engine may not start.

• The driver can customise KOS; enabling/disa-

bling all the system functions, enabling the door
locking/unlocking function only, or enabling the
engine starting function only (Refer to

P.42B-31

• Engine start function: The system has been

changed to the engine start system that supports
OSS (one-touch start system).

NOTE: OSS (one-touch start system): System that

has the electrically actuated steering lock, and
that allows the engine to be started and the vehi-
cle power to be switched via the operation of
engine switch.

• Engine starting method when keyless operation

key battery is discharged: A change has been
made to the control that does not use the emer-
gency key and performs the control with the dis-
charged keyless operation key inserted in the key
slot.

GENERAL INFORMATION

KEYLESS OPERATION SYSTEM (KOS)

42B-3

CONSTRUCTION DIAGRAM

ACC00329

ACB05528

ACB05578

ACB05671

Engine-ECU

Exterior transmitter
antenna assembly
(Driver's side)

Exterior transmitter
antenna assembly
(Tailgate)

KOS-ECU

ETACS-ECU

Lock/Unlock switch
(Passenger's side)

Lock/Unlock switch
(Driver's side)

Exterior transmitter
antenna assembly
(Passenger's side)

Interior transmitter
antenna assembly
(Rear)

Interior transmitter
antenna assembly
(Front)

Combination meter

OSS-ECU

Brake pedal
(Stop lamp switch)

Selector lever assembly
(P range detection switch)

Outer buzzer

Key slot

Electric
steering lock

Lock/Unlock switch

Tailgate
lock release handle

Tailgate lock
release handle

Lock switch

Engine switch

Lock/Unlock switch

(

Driver's side

)

GENERAL INFORMATION

KEYLESS OPERATION SYSTEM (KOS)

42B-4

Main components and functions

ACC00331

ACB05440

ACB05441

KEYLESS OPERATION
SYSTEM SERVICE
REQUIRED

<High contrast meter>

<Standard meter>

Combination meter

Keyless operation
system indicator

Immobilizer/electric
steering lock warning lamp

Multi information display

Parts name

Functional description

KOS-ECU

Controls KOS by using the following inputs/outputs and
communications.

• Input of front door lock/unlock switch, input of tailgate lock

release handle, and input of tailgate lock switch

• Communications with ETACS-ECU, OSS-ECU and

combination meter via CAN

• Wireless communication of keyless operation key via the

interior and exterior transmitter antennas as well as via the key
slot integrated antenna

• Output to the outer buzzer

• Output of actuator driving permission signal to electric steering

lock

Electric steering lock (incorporates
electric steering lock unit)

The steering lock mechanism incorporates a mechanism that can
electrically unlock the lock. When the lock is unlocked electrically,
the steering lock is unlocked approximately for 30 seconds by the
certification communication with OSS-ECU via LIN
communication, the power supply permission signal obtained via
wire communication, and the actuator driving permission signal
received via wire communication from KOS-ECU.

ACB05931

AC703227

Lock switch

Unlock switch

Emergency key

Indicator lamp

Keyless operation key

Electric tailgate switch
<Vehicles with electric tailgate>

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