Mitsubishi Evolution X. Manual — part 90

SYSTEM OPERATION

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-9

When a driver carrying a keyless operation key
presses the lock switch and the unlock sensor (door
outside handle) on the driver's/passenger's door out-
side handle or the trunk lid opener switch, the key-
less operation key and KOS-ECU communicate to
certify* the keyless operation key. When KOS-ECU
certifies the registered keyless operation key within
70 cm (28 inches) in radius from the outer side of the
vehicle, it requests ETACS-ECU to lock/unlock the
doors (Even within this range, the key may not be
certified when it is positioned too high or too low).
NOTE: *: In the communication for certification of the
keyless operation key, KOS-ECU judges if the key-
less operation key ID (specified to keyless operation
key) contained in the response data from the keyless
operation key coincides with the ID that has been
stored in ECU by registration operation. The keyless
operation key sends the response to KOS-ECU only
when the KOS ID (specific to KOS-ECU) contained
in the received data coincided with the stored ID. In
the beginning of the communication for certification,

KOS-ECU creates an encrypted code calculation
factor in random number, and sends it to the keyless
operation key together with the transmit data. The
keyless operation key calculates the code by using
the received factor, and sends the result to
KOS-ECU together with the response data.
KOS-ECU determines that the communication is
established only when the code calculation results of
both parties coincided.

.

UNLOCKING OPERATION OF DOOR
ENTRY FUNCTION

The keyless operation key and KOS-ECU communi-
cate to certify the keyless operation key when the
unlock sensor on the driver-side/front passen-
ger-side door outside handle or the trunk lid opener
switch is turned ON. When KOS-ECU certifies the
registered keyless operation key on the outer side of
the vehicle, it requests ETACS-ECU to unlock the
doors.

.

CONTROL OF UNLOCKING OPERATION

AC500829AD

ON

OFF

CAN

b

d

c

e

f

h

g

g

g

g

a

The unlock sensor of door outside handle
(driver's side, passenger's side) or the
trunk lid opener switch

Transmission

Communication

Un-communicating

Un-transmitting

Response

Un-answering

Transmission

Un-transmitting

Transmission

Un-transmitting

Keyless operation key
1 to 4 response

Exterior transmitter antenna
assembly opposite side

Interior transmitter antenna
assembly

Exterior transmitter antenna
assembly operation side

a: Exterior data transmitting start: 0.015 to 0.04 sec
b: Interior data transmitting start: 0.03 to 0.05 sec
c: Keyless operation key 1 response time of
onset 0.035 to 0.06 sec
d: Keyless operation key 2 response time of
onset 0.08 to 0.115 sec

e: Keyless operation key 3 response time of onset 0.135 to 0.18 sec
d: Keyless operation key 2 response time of onset 0.205 to 0.26 sec

g: CAN communication time of onset: to 0.3 sec
h: Retry time: It is variable by the registration number
(at the time of 4 pieces registration 3.1 sec).

If there is no keyless operation key

response, retry is performed once.

Jamming is not transmitted at

the time of trunk lid operation.

SYSTEM OPERATION

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-10

1. When KOS-ECU detects that the unlock sensor

on the driver-side/front passenger-side door
outside handle or the trunk lid opener switch is
turned ON, it transmits the exterior data from the
exterior transmitter antenna assembly on the
operation side. At the same time, KOS-ECU
transmits the interfering radio wave* (reversal
code) from the exterior transmitter antenna
assembly on the other side (The interfering radio
wave will be transmitted from the front
passenger-side antenna assembly when the
driver-side door outside handle is operated, and
vice versa. It will not be transmitted when the
trunk lid opener switch is operated).
NOTE: *: The interfering radio wave is transmitted
to disable the door lock operation by a person
without the keyless operation key while a user
with the keyless operation key is operating the
door lock from the opposite side of the vehicle.

2. After the exterior data is transmitted from the

exterior transmitter antenna assembly, the interior
data is transmitted from the interior transmitter
antenna assembly (front, rear).

3. For the specified time period (varies with the

number of the keyless operation keys registered
in KOS-ECU), KOS-ECU monitors the response
from the keyless operation key that meets the
unlock conditions.

• When the keyless operation key receives the

exterior data only, KOS-ECU transmits the unlock
request (request to unlock the applicable posi-
tion) to ETACS-ECU.

• When KOS-ECU received no response that

enables the unlocking after the specified time
period has passed, it performs the retry cycle
once (When no response after the retry,
KOS-ECU terminates the unlocking operation).

.

UNLOCKING OPERATION INHIBITION
TIME

Considering the customer pulls the door outer handle
to make sure the doors are locked, unlocking opera-
tion is inhibited for three seconds after the doors are
locked by the lock switches on the driver-side/front
passenger-side door outside handle or on the trunk
lid opener switch. This duration can be selected from
zero, three seconds, and five seconds, and can be
switched using a customization function (Refer to

P.42B-28

). The initial setting at factory is 3 seconds.

.

UNLOCKING OPERATION INHIBITION
CONDITIONS

The door unlocking operation is inhibited when:

• The emergency key is in the ignition switch.

• The push switch in the steering lock is ON.

• The IG knob is in other than LOCK (OFF) posi-

tion.

• During the unlocking operation inhibition time

.

LOCKING OPERATION OF DOOR ENTRY
FUNCTION

The keyless operation key and KOS-ECU communi-
cate to certify the keyless operation key when the
lock switch on the driver-side/front passenger-side
door outside handle is turned ON. When KOS-ECU
certifies the registered keyless operation key only on
the outer side of the vehicle, it requests ETACS-ECU
to lock all the doors.

.

SYSTEM OPERATION

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-11

CONTROL OF LOCKING OPERATION

1. When KOS-ECU detects that the lock switch on

the driver-side/front passenger-side door outside
handle is turned ON, it transmits the exterior data
from the exterior transmitter antenna assembly on
the operation side. At the same time, KOS-ECU
transmits the interfering radio wave (reversal
code) from the exterior transmitter antenna
assembly on the other side. (The interfering radio
wave will be transmitted from the front
passenger-side antenna assembly when the
driver-side door outside handle is operated, and
vice versa.)

2. After the exterior data is transmitted from the

exterior transmitter antenna assembly, the interior
data is transmitted from the interior transmitter
antenna assembly (front, rear).

3. After the specified time period (varies with the

number of the keyless operation keys registered
in KOS-ECU) has passed, confirm that there is no
keyless operation key in the interior.

• When KOS-ECU receives the response from the

keyless operation keys that received the interior
data, KOS-ECU cancels the locking operation.

4. KOS-ECU transmits the interior data from the

interior transmitter antenna assembly (Front).

5. After the specified time period (varies with the

number of the keyless operation keys registered
in KOS-ECU) has passed, confirm that the lock
conditions are met.

• When KOS-ECU receives the response from the

keyless operation keys that received the interior
data, KOS-ECU cancels the locking operation.

• When all the responding keyless operation keys

receive the exterior data only, KOS-ECU trans-
mits the lock request to ETACS-ECU.

• If there is no response from the keyless operation

keys, perform step 6 once.

AC607100AB

ON

OFF

b

d

c

e

f

h

g

g

a

CAN

The lock switch of door

outside handle (driver's

side, passenger's side)

Transmission

Communication

Un-communicating

Un-transmitting

Response

Un-answering

Transmission

Un-transmitting

Transmission

Un-transmitting

Keyless operation key

1 to 4 response

Exterior transmitter

antenna assembly

opposite side

Interior transmitter

antenna assembly

Exterior transmitter

antenna assembly

operation side

a: Exterior data transmitting start: 0.03 to 0.04 sec
b: Interior data transmitting start: 0.03 to 0.05 sec
c: Keyless operation key 1 response time of
onset 0.035 to 0.06 sec
d: Keyless operation key 2 response time of
onset 0.08 to 0.115 sec

e: Keyless operation key 3 response time of onset 0.135 to 0.18 sec
d: Keyless operation key 2 response time of onset 0.205 to 0.26 sec

g: Retry time: It is variable by the registration number
(at the time of 4 pieces registration 0.31 sec).
h: CAN communication time of onset: to 0.65 sec

If there is no keyless operation key response,

retry that keyless operation key located outside.

SYSTEM OPERATION

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-12

6. KOS-ECU transmits the exterior data from the

exterior transmitter antenna assembly on the
operation side. At the same time, KOS-ECU
transmits the interfering radio wave (reversal
code) from the exterior transmitter antenna
assembly on the other side. (The interfering radio
wave will be transmitted from the front
passenger-side antenna assembly when the
driver-side door outside handle is operated, and
vice versa.)

7. After the specified time period (varies with the

number of the keyless operation keys registered
in KOS-ECU) has passed, confirm that the lock
conditions are met.

• When the responded keyless operation keys after

the retry receives the exterior data only,
KOS-ECU transmits the lock request (request to
lock the actuated position) to ETACS-ECU.

.

LOCKING OPERATION INHIBITION
CONDITIONS

In the following cases, the door locking operation is
inhibited.

• Any door is open/ajar (door switch is ON).

(including door ajar)

• The emergency key is in the ignition switch.

• The push switch in the steering lock is ON.

• The IG knob is in other than LOCK (OFF) posi-

tion.

.

ANSWERBACK FUNCTIONS

When KOS-ECU sends a signal to ETACS-ECU,
ETACS-ECU outputs the lock/unlock signal and acti-
vates the hazard warning light and the outer tone
alarm to notify the driver the doors are
locked/unlocked.

.

KOS TIMER LOCK FUNCTION

When none of the doors are opened within 30 sec-
onds after the doors are unlocked by KOS,
ETACS-ECU automatically outputs the door lock sig-
nal to lock the doors. This function prevents the
doors from being unlocked accidentally.

Item

Lock signal received

Unlock signal received

ETACS-ECU

Lock signal output

Unlock signal output

Hazard warning light

Flashes once

Flashes twice

Outer tone alarm

Sounds once (initial setting) or none Sounds twice (initial setting) or none