Mitsubishi Outlander (2013+). Manual - part 184

GENERAL INFORMATION

KEYLESS OPERATION SYSTEM (KOS)

42B-4

Main components and functions

ACC00331

ACB05440

ACB05441

KEYLESS OPERATION
SYSTEM SERVICE
REQUIRED

AB

<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

AB

Lock switch

Unlock switch

Emergency key

Indicator lamp

Keyless operation key

Electric tailgate switch
<Vehicles with electric tailgate>

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GENERAL INFORMATION

KEYLESS OPERATION SYSTEM (KOS)

42B-5

Keyless operation key (incorporates 
emergency key)

• The keyless operation key receives signals sent from each 

interior/exterior transmitter antenna, certifies the key ID code, 
calculates the encrypted code, and sends the reply data signal 
to KOS-ECU. If the integrated battery is discharged, the keyless 
operation key receives signals sent from the key slot when it is 
inserted in the key slot. Then, it certifies the key ID code, 
calculates the encrypted code, and sends the reply data signal 
to KOS-ECU via the key slot. Also, when the lock/unlock switch 
on the keyless operation key is pressed, the corresponding 
signal is sent to KOS-ECU.

• If two or more keyless operation keys registered in KOS-ECU 

respond at the same time, their signals would interfere. To avoid 
this interference, each signal from KOS-ECU is given the 

priority

*

 data, and the keyless operation keys respond in 

accordance with this priority.

Lock/Unlock switch

Driver’s side

Locks/unlocks all the doors and tailgate when the driver carrying 
the keyless operation key presses the lock/unlock switch on the 
front door outside handle. 

Passenger’s 
side

Tailgate lock release handle

Unlocks all the doors and the tailgate when a driver carrying the 
keyless operation key presses the tailgate lock release handle. 

Tailgate lock switch

Locks all the doors and tailgate when the driver carrying the 
keyless operation key presses the lock switch on the tailgate lock 
release handle. 

Exterior transmitter 
antenna assembly

Driver’s side

Converts the data output from KOS-ECU via wire into a signal, and 
sends it to the keyless operation key (For more information on the 
transmission/reception area, refer to the door entry function valid 
area 

P.42B-8

).

Passenger’s 
side

Tailgate

Interior transmitter 
antenna assembly

Front

Converts the data output from KOS-ECU via wire into a signal, and 
sends it to the keyless operation key (For more information on the 
transmission/reception area, refer to the one-touch start system 
valid area 

P.42B-18

).

Rear

Outer buzzer

The outer buzzer sounds when:

• The doors are locked or unlocked by the door entry function.

• The keyless operation key is carried out of the vehicle when the 

power supply mode is other than OFF, and the door is closed.

• The lock/unlock switch on the front door outside handle is 

pressed when the power supply mode is other than OFF.

• The lock/unlock switch on the front door outside handle is 

pressed when the keyless operation key is still located inside 
the car.

• The lock/unlock switch on the front door outside handle is 

pressed when the door is ajar.

• With the driver's door kept open, the keyless operation key is 

not removed from the key slot located in the glove box.

Key slot

Converts the data output from KOS-ECU via wire into a signal, 
sends it to the keyless operation key, and then sends the reply 
data signal from keyless operation key to KOS-ECU.

Parts name

Functional description

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GENERAL INFORMATION

KEYLESS OPERATION SYSTEM (KOS)

42B-6

NOTE: 

*

: 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 engine switch 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.

OSS-ECU

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

• Input from the engine switch

• Input from stop lamp switch

• Input from P range detection switch

• Input of monitoring signal for actuator driving permission of 

electric steering lock via wire communication with KOS-ECU

• Output of KOS back-up power supply via wire communication 

with KOS-ECU

• Power supply output to electric steering lock unit

• CAN communication with KOS-ECU, ETACS-ECU, engine 

ECU, and combination meter

• LIN communication with electric steering lock

Engine switch

• Output of engine switch ON/OFF signal to OSS-ECU

• Input of LED signal from OSS-ECU

Combination meter (keyless operation 
alarm display)

Communicates with KOS-ECU and OSS-ECU via CAN. Receives 
the warning request or warning information from KOS-ECU and 
OSS-ECU, and displays the warning.

ETACS-ECU

• Communicates with KOS-ECU via CAN. By the door 

lock/unlock request or tailgate lock/unlock request from 
KOS-ECU, ETACS-ECU outputs the lock/unlock signal. When 
the door lock/unlock signal is output, the ETACS-ECU flashes 
or illuminates the turn-signal lamps and the room lamp to notify 
the driver that the doors are locked/unlocked. Furthermore, by 
the multi-mode function of keyless entry, the folding/unfolding of 
door mirrors is performed depending on the pattern of door 
lock/unlock request from KOS-ECU.

• Communicates with OSS-ECU via CAN, and outputs the door 

switch ON/OFF signal.

• Receives the ACC output signal or IG1 output signal sent from 

OSS-ECU via wire communication, and drives the ACC relay or 
supplies electrical current to the IG1 relay to drive the IG1 relay.

• Using the welcome light function, the headlamps and tail lamps 

are illuminated by the door unlock request from KOS-ECU.

Engine-ECU

Communicates with OSS-ECU through ETACS-ECU via CAN. 
Permits/inhibits the engine starting and controls the engine 
operation.

Parts name

Functional description

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GENERAL INFORMATION

KEYLESS OPERATION SYSTEM (KOS)

42B-7

System configuration

ACB05960

Electric steering lock

CPU

Receiver
antenna

OSS-ECU

Combination meter

KOS-ECU

Engine switch
(ON signal)

Engine switch
(LED indicator)

Selector lever assembly
 (P range detection switch)
Brake pedal
 (Stop lamp switch)

Lock/Unlock switch
(Driver's side/
Passenger's side)
Tailgate lock  switch
Tailgate lock release 
handle

Keyless operation key
(Lock/Unlock/Electric 
tailgate <Vehicles with 
electric tailgate>)

Key slot

Outer buzzer

ETACS-ECU

Door lock actuator
Tailgate lock actuator
Door mirrors
Room lamp
Turn-signal lamp
Tail lamp
Position lamp
Headlamp

Each door switch

CAN-C-Mid
communication

Engine-ECU

CAN-C
communication

LIN communication
(Local)

AB

Interior transmitter
antenna assembly
(Front/Rear)

Exterior transmitter
antenna 
(Driver's side/
Passenger's side/
Tailgate) 

Frequency
signal

Frequency
signal

Frequency
signal

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